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shaft fracture</title> <meta name="description" content="Search results for: humerus shaft fracture"> <meta name="keywords" content="humerus shaft fracture"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="humerus shaft fracture"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 810</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: humerus shaft fracture</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">810</span> A Systematic Review of Patient-Reported Outcomes and Return to Work after Surgical vs. Non-surgical Midshaft Humerus Fracture</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jamal%20Alasiri">Jamal Alasiri</a>, <a href="https://publications.waset.org/abstracts/search?q=Naif%20Hakeem"> Naif Hakeem</a>, <a href="https://publications.waset.org/abstracts/search?q=Saoud%20Almaslmani"> Saoud Almaslmani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: Patients with humeral shaft fractures have two different treatment options. Surgical therapy has lesser risks of non-union, mal-union, and re-intervention than non-surgical therapy. These positive clinical outcomes of the surgical approach make it a preferable treatment option despite the risks of radial nerve palsy and additional surgery-related risk. We aimed to evaluate patients’ outcomes and return to work after surgical vs. non-surgical management of shaft humeral fracture. Methods: We used databases, including PubMed, Medline, and Cochrane Register of Controlled Trials, from 2010 to January 2022 to search for potential randomised controlled trials (RCTs) and cohort studies comparing the patients’ related outcome measures and return to work between surgical and non-surgical management of humerus fracture. Results: After carefully evaluating 1352 articles, we included three RCTs (232 patients) and one cohort study (39 patients). The surgical intervention used plate/nail fixation, while the non-surgical intervention used a splint or brace procedure to manage shaft humeral fracture. The pooled DASH effects of all three RCTs at six (M.D: -7.5 [-13.20, -1.89], P: 0.009) I2:44%) and 12 months (M.D: -1.32 [-3.82, 1.17], p:0.29, I2: 0%) were higher in patients treated surgically than in non-surgical procedures. The pooled constant Murley score at six (M.D: 7.945[2.77,13.10], P: 0.003) I2: 0%) and 12 months (M.D: 1.78 [-1.52, 5.09], P: 0.29, I2: 0%) were higher in patients who received non-surgical than surgical therapy. However, pooled analysis for patients returning to work for both groups remained inconclusive. Conclusion: Altogether, we found no significant evidence supporting the clinical benefits of surgical over non-surgical therapy. Thus, the non-surgical approach remains the preferred therapeutic choice for managing shaft humeral fractures due to its lesser side effects. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=shaft%20humeral%20fracture" title="shaft humeral fracture">shaft humeral fracture</a>, <a href="https://publications.waset.org/abstracts/search?q=surgical%20treatment" title=" surgical treatment"> surgical treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=Patient-related%20outcomes" title=" Patient-related outcomes"> Patient-related outcomes</a>, <a href="https://publications.waset.org/abstracts/search?q=return%20to%20work" title=" return to work"> return to work</a>, <a href="https://publications.waset.org/abstracts/search?q=DASH" title=" DASH"> DASH</a> </p> <a href="https://publications.waset.org/abstracts/149651/a-systematic-review-of-patient-reported-outcomes-and-return-to-work-after-surgical-vs-non-surgical-midshaft-humerus-fracture" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/149651.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">98</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">809</span> Posterior Thigh Compartment Syndrome Associated with Hamstring Avulsion and Antiplatelet Therapy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Andrea%20Gatti">Andrea Gatti</a>, <a href="https://publications.waset.org/abstracts/search?q=Federica%20Coppotelli"> Federica Coppotelli</a>, <a href="https://publications.waset.org/abstracts/search?q=Ma%20Primavera"> Ma Primavera</a>, <a href="https://publications.waset.org/abstracts/search?q=Laura%20Palmieri"> Laura Palmieri</a>, <a href="https://publications.waset.org/abstracts/search?q=Umberto%20Tarantino"> Umberto Tarantino</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Aim of study: Scientific literature is scarce of studies and reviews valuing the pros and cons of the paratricipital approach for the treatment of humeral shaft fractures; the lateral paratricipital approach is a valid alternative to the classical posterior approach to the humeral shaft as it preserves both the triceps muscle and the elbow extensor mechanisms; based on our experience, this retrospective analysis aims at analyzing outcome, risks and benefits of the lateral paratricipital approach for humeral shaft fractures. Methods: Our study includes 14 patients treated between 2018 and 2019 for unilateral humeral shaft fractures: 13 with a B1 or B2 and a patient with a C fracture type (according to the AO/ATO Classification); 6 of our patients identified as male while 8 as female; age average was 57.8 years old (range 21-73 years old). A lateral paratricipital approach was performed on all 14 patients, sparing the triceps muscle by avoiding the olecranon osteotomy and by assessing the integrity and the preservation of the radial nerve; the humeral shaft fracture osteosynthesis was performed by means of plates and screws. After surgery all patients have started elbow functional rehabilitation with acceptable pain management. Post-operative follow-up has been carried out by assessing radiographs, MEPS (Mayo Elbow Performance Score) and DASH (Disability of Arm Shoulder and Hand) functional assessment and ROM of the affected joint. Results: All 14 patients had an optimal post-operative follow-up with an adequate osteosynthesis and functional rehabilitations by entirely preserving the operated elbow joint; the mean elbow ROM was 0-118.6 degree (range of 0-130) while the average MEPS score was 86 (range75-100) and 79.9 for the DASH (range 21.7-86.1). Just 2 patients suffered of temporary radial nerve apraxia, healed in the subsequent follow-ups. CONCLUSION: The lateral paratricipital approach preserve both the integrity of the triceps muscle and the elbow biomechanism but we do strongly recommend additional studies to be carried out to highlight differences between it and the classical posterior approach in treating humeral shaft fractures. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=paratricepital%20approach" title="paratricepital approach">paratricepital approach</a>, <a href="https://publications.waset.org/abstracts/search?q=humerus%20shaft%20fracture" title=" humerus shaft fracture"> humerus shaft fracture</a>, <a href="https://publications.waset.org/abstracts/search?q=posterior%20approach%20humeral%20shaft" title=" posterior approach humeral shaft"> posterior approach humeral shaft</a>, <a href="https://publications.waset.org/abstracts/search?q=paratricipital%20postero-lateral%20approach" title=" paratricipital postero-lateral approach "> paratricipital postero-lateral approach </a> </p> <a href="https://publications.waset.org/abstracts/123570/posterior-thigh-compartment-syndrome-associated-with-hamstring-avulsion-and-antiplatelet-therapy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/123570.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">129</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">808</span> Comparative Study in Treatment of Distal Humerus Fracture with Lateral Column Plate Percutaneous Medial Screw and Intercondylar Screw</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sameer%20Gupta">Sameer Gupta</a>, <a href="https://publications.waset.org/abstracts/search?q=Prant%20Gupta"> Prant Gupta</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Context: Fractures in the distal humerus are complex and challenging injuries for orthopaedic surgeons that can be effectively treated with open reduction and internal fixation. Aims: The study analyses clinical outcomes in patients with intra-articular distal humerus fractures (AO type 13 C3 excluded) treated using a different method of fixation ( LCPMS). Subject and Methods: A study was performed, and the author's personal experiences were reported. Thirty patients were treated using an intercondylar screw with lateral column plating and percutaneous medial column screw fixation. Detailed analysis was done for functional outcomes (average arc of motion, union rate, and complications). Statistical Analysis Used: SPSS software version 22.0 was used for statistical analysis. Results: In our study, at the end of 6 months, Overall good to excellent results were achieved in 28 patients out of 30 after analysis on the basis of MEP score. The majority of patients regained full arc of motion, achieved fracture union without any major complications, and were able to perform almost all activities of daily living (which required good elbow joint movements and functions). Conclusion: We concluded that this novel method provides adequate stability and anatomical reconstruction with an early union rate observed at the end of 6 months. Excellent functional outcome was observed in almost all the patients because of less operating time and initiation of early physiotherapy, as most of the patients experienced mild nature of pain post-surgery. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=intra%20arricular%20distal%20humerus%20fracture" title="intra arricular distal humerus fracture">intra arricular distal humerus fracture</a>, <a href="https://publications.waset.org/abstracts/search?q=percutaneous%20medial%20screw" title=" percutaneous medial screw"> percutaneous medial screw</a>, <a href="https://publications.waset.org/abstracts/search?q=lateral%20column%20plate" title=" lateral column plate"> lateral column plate</a>, <a href="https://publications.waset.org/abstracts/search?q=arc%20of%20motion" title=" arc of motion"> arc of motion</a> </p> <a href="https://publications.waset.org/abstracts/182202/comparative-study-in-treatment-of-distal-humerus-fracture-with-lateral-column-plate-percutaneous-medial-screw-and-intercondylar-screw" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/182202.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">60</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">807</span> Inverse Mode Shape Problem of Hand-Arm Vibration (Humerus Bone) for Bio-Dynamic Response Using Varying Boundary Conditions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ajay%20R">Ajay R</a>, <a href="https://publications.waset.org/abstracts/search?q=Rammohan%20B"> Rammohan B</a>, <a href="https://publications.waset.org/abstracts/search?q=Sridhar%20K%20S%20S"> Sridhar K S S</a>, <a href="https://publications.waset.org/abstracts/search?q=Gurusharan%20%20N"> Gurusharan N</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of the work is to develop a numerical method to solve the inverse mode shape problem by determining the cross-sectional area of a structure for the desired mode shape via the vibration response study of the humerus bone, which is in the form of a cantilever beam with anisotropic material properties. The humerus bone is the long bone in the arm that connects the shoulder to the elbow. The mode shape is assumed to be a higher-order polynomial satisfying a prescribed set of boundary conditions to converge the numerical algorithm. The natural frequency and the mode shapes are calculated for different boundary conditions to find the cross-sectional area of humerus bone from Eigenmode shape with the aid of the inverse mode shape algorithm. The cross-sectional area of humerus bone validates the mode shapes of specific boundary conditions. The numerical method to solve the inverse mode shape problem is validated in the biomedical application by finding the cross-sectional area of a humerus bone in the human arm. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cross-sectional%20area" title="Cross-sectional area">Cross-sectional area</a>, <a href="https://publications.waset.org/abstracts/search?q=Humerus%20bone" title=" Humerus bone"> Humerus bone</a>, <a href="https://publications.waset.org/abstracts/search?q=Inverse%20mode%20shape%20problem" title=" Inverse mode shape problem"> Inverse mode shape problem</a>, <a href="https://publications.waset.org/abstracts/search?q=Mode%20shape" title=" Mode shape"> Mode shape</a> </p> <a href="https://publications.waset.org/abstracts/125654/inverse-mode-shape-problem-of-hand-arm-vibration-humerus-bone-for-bio-dynamic-response-using-varying-boundary-conditions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/125654.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">127</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">806</span> Dependence of Shaft Stiffness on the Crack Location</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20M.%20Mobarak">H. M. Mobarak</a>, <a href="https://publications.waset.org/abstracts/search?q=Helen%20Wu"> Helen Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Chunhui%20Yang"> Chunhui Yang </a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, an analytical model is developed to study crack breathing behavior under the effect of crack location and unbalance force. Crack breathing behavior is determined using effectual bending angle by studying the transient change in closed area of the crack. The status of the crack of a balanced shaft is symmetrical about shaft rotational angle and the duration of each crack status remains unchanged. The global stiffness of the balanced shaft is independent of crack location. Different crack breathing behavior for the unbalanced shaft has been observed. The influence of crack location on the unbalanced shaft stiffness can be divided into three regions. When the crack is located between 0.3L and 0.8335L, where L is the total length of the shaft, the unbalanced shaft is less stiff and when located outside this region it is stiffer than the balanced shaft. It was also found that unbalanced shaft stiffness has a maximum value with a crack at 0.1946L, a minimum value at 0.8053L and same value as balanced shaft at 0.3L and 0.8335L. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cracked%20shaft" title="cracked shaft">cracked shaft</a>, <a href="https://publications.waset.org/abstracts/search?q=crack%20location" title=" crack location"> crack location</a>, <a href="https://publications.waset.org/abstracts/search?q=shaft%20stiffness" title=" shaft stiffness"> shaft stiffness</a>, <a href="https://publications.waset.org/abstracts/search?q=unbalanced%20force" title=" unbalanced force"> unbalanced force</a> </p> <a href="https://publications.waset.org/abstracts/58562/dependence-of-shaft-stiffness-on-the-crack-location" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/58562.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">307</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">805</span> Effectiveness of Centromedullary Fixation by Metaizeau Technique in Challenging Pediatric Fractures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Arshad%20Ikram">Mohammad Arshad Ikram</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We report three cases of challenging fractures in children treated by intramedullary fixation using the Metaizeau method and achieved anatomical reduction with excellent clinical results. Jean-Paul Metaizeau described the centromedullary fixation for the radial neck in 1980 using K-wires Radial neck fractures are uncommon in children. Treatment of severely displaced fractures is always challenging. Closed reduction techniques are more popular as compared to open reduction due to the low risk of complications. Metaizeau technique of closed reduction with centromedullary pinning is a commonly preferred method of treatment. We present two cases with a severely displaced radial neck fracture, treated by this method and achieved sound union; anatomical position of the radial head and full function were observed two months after surgery. Proximal humerus fractures are another uncommon injury in children accounting for less than 5% of all pediatric fractures. Most of these injuries occur through the growth plate because of its relative weakness. Salter-Harris type I is commonly seen in the younger age group, whereas type II & III occurs in older children and adolescents. In contrast to adults, traumatic glenohumeral dislocation is an infrequently observed condition among children. A combination of proximal humerus fracture and glenohumeral dislocation is extremely rare and occurs in less than 2% of the pediatric population. The management of this injury is always challenging. Treatment ranged from closed reduction with and without internal fixation and open reduction with internal fixation. The children who had closed reduction with centromedullary fixation by the Metaizeau method showed excellent results with the return of full movements at the shoulder in a short time without any complication. We present the case of a child with anterior dislocation of the shoulder associated with a complete displaced proximal humerus metaphyseal fracture. The fracture was managed by closed reduction and then fixation by two centromedullary K-wires using the Metaizeau method, achieving the anatomical reduction of the fracture and dislocation. This method of treatment enables us to achieve excellent radiological and clinical results in a short time. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=glenohumeral" title="glenohumeral">glenohumeral</a>, <a href="https://publications.waset.org/abstracts/search?q=Metaizeau%20method" title=" Metaizeau method"> Metaizeau method</a>, <a href="https://publications.waset.org/abstracts/search?q=pediatric%20fractures" title=" pediatric fractures"> pediatric fractures</a>, <a href="https://publications.waset.org/abstracts/search?q=radial%20neck" title=" radial neck"> radial neck</a> </p> <a href="https://publications.waset.org/abstracts/150084/effectiveness-of-centromedullary-fixation-by-metaizeau-technique-in-challenging-pediatric-fractures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/150084.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">105</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">804</span> Orthopedic Trauma in Newborn Babies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Joanna%20Maj">Joanna Maj</a>, <a href="https://publications.waset.org/abstracts/search?q=Awais%20Hussain"> Awais Hussain</a>, <a href="https://publications.waset.org/abstracts/search?q=Lyndsey%20Vu"> Lyndsey Vu</a>, <a href="https://publications.waset.org/abstracts/search?q=Catherine%20Roxas"> Catherine Roxas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: Bone injuries in babies are common conditions that arise during delivery. Fractures of the clavicle, humerus, femur, and skull are the most common neonatal bone injuries sustained from labor and delivery. During operative deliveries, zealous tractions, ineffective delivery techniques, improper uterine incision, and inadequate relaxation of the uterus can lead to bone fractures in the newborn. Neonatal anatomy is unique. Just as children are not mini-adults, newborns are not mini children. A newborn’s anatomy and physiology are significantly different from a pediatric patient's. In this paper, we describe common orthopedic trauma in newborn babies. We provide a comprehensive overview of the different types of bone injuries in newborns. We hypothesize that the rate of bone fractures sustained at birth is higher in cases of operative deliveries. Methods: Relevant literature was selected by using the PubMed database. Search terms included orthopedic conditions in newborns, neonatal anatomy, and bone fractures in neonates during operative deliveries. Inclusion criteria included age, gender, race, type of bone injury and progression of bone injury. Exclusion criteria were limited in the medical history of cases reviewed and comorbidities. Results: This review finds that a clavicle fracture is the most common type of neonatal orthopedic injury sustained at birth in both operative and non-operative deliveries. We confirm the hypothesis that infants born via operative deliveries have a significantly higher rate of bone fractures than non-cesarean section deliveries. Conclusion: Newborn babies born via operative deliveries have a higher rate of bone fractures of the clavicle, humerus, and femur. A clavicle bone fracture in newborns is most common during emergency operative deliveries in new mothers. We conclude that infants born via an operative delivery sustained more bone injuries than infants born via non-cesarean section deliveries. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=clavicle%20fracture" title="clavicle fracture">clavicle fracture</a>, <a href="https://publications.waset.org/abstracts/search?q=humerus%20fracture" title=" humerus fracture"> humerus fracture</a>, <a href="https://publications.waset.org/abstracts/search?q=neonates" title=" neonates"> neonates</a>, <a href="https://publications.waset.org/abstracts/search?q=newborn%20orthopedics" title=" newborn orthopedics"> newborn orthopedics</a>, <a href="https://publications.waset.org/abstracts/search?q=orthopedic%20surgery" title=" orthopedic surgery"> orthopedic surgery</a>, <a href="https://publications.waset.org/abstracts/search?q=pediatrics" title=" pediatrics"> pediatrics</a>, <a href="https://publications.waset.org/abstracts/search?q=orthopedic%20trauma" title=" orthopedic trauma"> orthopedic trauma</a>, <a href="https://publications.waset.org/abstracts/search?q=orthopedic%20trauma%20during%20delivery" title=" orthopedic trauma during delivery"> orthopedic trauma during delivery</a>, <a href="https://publications.waset.org/abstracts/search?q=cesarean%20section" title=" cesarean section"> cesarean section</a>, <a href="https://publications.waset.org/abstracts/search?q=obstetrics" title=" obstetrics"> obstetrics</a>, <a href="https://publications.waset.org/abstracts/search?q=neonatal%20anatomy" title=" neonatal anatomy"> neonatal anatomy</a>, <a href="https://publications.waset.org/abstracts/search?q=neonatal%20fractures" title=" neonatal fractures"> neonatal fractures</a>, <a href="https://publications.waset.org/abstracts/search?q=operative%20deliveries" title=" operative deliveries"> operative deliveries</a>, <a href="https://publications.waset.org/abstracts/search?q=labor%20and%20delivery" title=" labor and delivery"> labor and delivery</a>, <a href="https://publications.waset.org/abstracts/search?q=bone%20injuries%20in%20neonates" title=" bone injuries in neonates"> bone injuries in neonates</a> </p> <a href="https://publications.waset.org/abstracts/158766/orthopedic-trauma-in-newborn-babies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/158766.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">101</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">803</span> Influence of Angular Position of Unbalanced Force on Crack Breathing Mechanism</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Roselyn%20Zaman">Roselyn Zaman</a>, <a href="https://publications.waset.org/abstracts/search?q=Mobarak%20Hossain"> Mobarak Hossain</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A new mathematical model is developed to study crack breathing behavior considering effect of angular position of unbalanced force at different crack locations. Crack breathing behavior has been determined using effectual bending angle by studying the transient change of the crack area. Different crack breathing behavior of the unbalanced shaft has been observed for different combination of angular position of unbalanced force with crack location except crack locations 0.3L and 0.8335L, where L is the total length of the shaft, where unbalanced shaft behave completely like the balanced shaft. Based on different combination of angular position of unbalanced force with crack location, the stiffness of unbalanced shaft can be divided into three regions. An unbalanced shaft is overall stiffer than a balanced shaft when angular position of unbalance force is between 90° to 270° and crack located between 0.3L and 0.8335L, and it is overall flexible when the crack located in outside this crack region. On the other hand, it is overall flexible when angular position of unbalanced force is between 0° to 90° or 270° to 360° and crack located in middle region and it is overall stiffer for outside this crack region. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cracked%20shaft" title="cracked shaft">cracked shaft</a>, <a href="https://publications.waset.org/abstracts/search?q=crack%20location" title=" crack location"> crack location</a>, <a href="https://publications.waset.org/abstracts/search?q=shaft%20stiffness" title=" shaft stiffness"> shaft stiffness</a>, <a href="https://publications.waset.org/abstracts/search?q=unbalanced%20force" title=" unbalanced force"> unbalanced force</a>, <a href="https://publications.waset.org/abstracts/search?q=and%20unbalanced%20force%20orientation" title=" and unbalanced force orientation"> and unbalanced force orientation</a> </p> <a href="https://publications.waset.org/abstracts/87582/influence-of-angular-position-of-unbalanced-force-on-crack-breathing-mechanism" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/87582.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">268</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">802</span> Factors Affecting Early Antibiotic Delivery in Open Tibial Shaft Fractures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=William%20Elnemer">William Elnemer</a>, <a href="https://publications.waset.org/abstracts/search?q=Nauman%20Hussain"> Nauman Hussain</a>, <a href="https://publications.waset.org/abstracts/search?q=Samir%20Al-Ali"> Samir Al-Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=Henry%20Shu"> Henry Shu</a>, <a href="https://publications.waset.org/abstracts/search?q=Diane%20Ghanem"> Diane Ghanem</a>, <a href="https://publications.waset.org/abstracts/search?q=Babar%20Shafiq"> Babar Shafiq</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: The incidence of infection in open tibial shaft injuries varies depending on the severity of the injury, with rates ranging from 1.8% for Gustilo-Anderson type I to 42.9% for type IIIB fractures. The timely administration of antibiotics upon presentation to the emergency department (ED) is an essential component of fracture management, and evidence indicates that prompt delivery of antibiotics is associated with improved outcomes. The objective of this study is to identify factors that contribute to the expedient administration of antibiotics. Methods: This is a retrospective study of open tibial shaft fractures at an academic Level I trauma center. Current Procedural Terminology (CPT) codes identified all patients treated for open tibial shaft fractures between 2015 and 2021. Open fractures were identified by reviewing ED and provider notes, and with ballistic fractures were considered open. Chart reviews were performed to extract demographics, fracture characteristics, postoperative outcomes, time to operative room, time to antibiotic order, and delivery. Univariate statistical analysis compared patients who received early antibiotics (EA), which were delivered within one hour of ED presentation, and those who received late antibiotics (LA), which were delivered outside of one hour of ED presentation. A multivariate analysis was performed to investigate patient, fracture, and transport/ED characteristics contributing to faster delivery of antibiotics. The multivariate analysis included the dependent variables: ballistic fracture, activation of Delta Trauma, Gustilo-Andersen (Type III vs. Type I and II), AO-OTA Classification (Type C vs. Type A and B), arrival between 7 am and 11 pm, and arrival via Emergency Medical Services (EMS) or walk-in. Results: Seventy ED patients with open tibial shaft fractures were identified. Of these, 39 patients (55.7%) received EA, while 31 patients (44.3%) received LA. Univariate analysis shows that the arrival via EMS as opposed to walk-in (97.4% vs. 74.2%, respectively, p = 0.01) and activation of Delta Trauma (89.7% vs. 51.6%, respectively, p < 0.001) was significantly higher in the EA group vs. the LA group. Additionally, EA cases had significantly shorter intervals between the antibiotic order and delivery when compared to LA cases (0.02 hours vs. 0.35 hours, p = 0.007). No other significant differences were found in terms of postoperative outcomes or fracture characteristics. Multivariate analysis shows that a Delta Trauma Response, arrival via EMS, and presentation between 7 am and 11 pm were independent predictors of a shorter time to antibiotic administration (Odds Ratio = 11.9, 30.7, and 5.4, p = 0.001, 0.016, and 0.013, respectively). Discussion: Earlier antibiotic delivery is associated with arrival to the ED between 7 am and 11 pm, arrival via EMS, and a coordinated Delta Trauma activation. Our findings indicate that in cases where administering antibiotics is critical to achieving positive outcomes, it is advisable to employ a coordinated Delta Trauma response. Hospital personnel should be attentive to the rapid administration of antibiotics to patients with open fractures who arrive via walk-in or during late-night hours. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antibiotics" title="antibiotics">antibiotics</a>, <a href="https://publications.waset.org/abstracts/search?q=emergency%20department" title=" emergency department"> emergency department</a>, <a href="https://publications.waset.org/abstracts/search?q=fracture%20management" title=" fracture management"> fracture management</a>, <a href="https://publications.waset.org/abstracts/search?q=open%20tibial%20shaft%20fractures" title=" open tibial shaft fractures"> open tibial shaft fractures</a>, <a href="https://publications.waset.org/abstracts/search?q=orthopaedic%20surgery" title=" orthopaedic surgery"> orthopaedic surgery</a>, <a href="https://publications.waset.org/abstracts/search?q=time%20to%20or" title=" time to or"> time to or</a>, <a href="https://publications.waset.org/abstracts/search?q=trauma%20fractures" title=" trauma fractures"> trauma fractures</a> </p> <a href="https://publications.waset.org/abstracts/171282/factors-affecting-early-antibiotic-delivery-in-open-tibial-shaft-fractures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/171282.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">65</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">801</span> An Unusual Fracture Pattern: Fracture of the Distal Radius (Colles') along with Fracture of the Ipsilateral Scaphoid & Capitate Bones</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Srikanta%20Tagore%20Sarkar">Srikanta Tagore Sarkar</a>, <a href="https://publications.waset.org/abstracts/search?q=Prasanta%20Kumar%20Mandal"> Prasanta Kumar Mandal</a>, <a href="https://publications.waset.org/abstracts/search?q=Dibakar%20Roy"> Dibakar Roy </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The association of a capitate fracture with a scaphoid fracture has been termed as the naviculocapitate syndrome. The existence of some nondisplaced fractures of scaphoid and capitate with or without the fracture of lunate or radius suggests that there is a spectrum of these injuries, and this confuses the terminology. With our case; we report an unusual variety of this naviculocapitate syndrome with distal radial Colles fracture in addition to the nondisplaced fractures of the scaphoid, capitate and the dorsal lip of radial fracture. When we looked at the literature there is no another Colles fracture reported together with undisplaced scapho-capitate syndrome. The coronal and sagittal images that obtained from the MDCT (Multidetector computed tomography) is useful and effective imaging modality to diagnose complex wrist fractures with more details that are not detected in X-rays. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=scaphoid" title="scaphoid">scaphoid</a>, <a href="https://publications.waset.org/abstracts/search?q=capitate" title=" capitate"> capitate</a>, <a href="https://publications.waset.org/abstracts/search?q=Colles%E2%80%99%20fracture" title=" Colles’ fracture"> Colles’ fracture</a>, <a href="https://publications.waset.org/abstracts/search?q=syndrome" title=" syndrome"> syndrome</a>, <a href="https://publications.waset.org/abstracts/search?q=MDCT" title=" MDCT"> MDCT</a>, <a href="https://publications.waset.org/abstracts/search?q=unusual" title=" unusual"> unusual</a> </p> <a href="https://publications.waset.org/abstracts/13989/an-unusual-fracture-pattern-fracture-of-the-distal-radius-colles-along-with-fracture-of-the-ipsilateral-scaphoid-capitate-bones" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13989.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">393</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">800</span> An Acoustical Diagnosis of a Shaft-Wood Phyto-Pathogenic Damage of Sequoiadendron giganteum (Lindl.) Buccholz</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yuri%20V.%20Plugatar">Yuri V. Plugatar</a>, <a href="https://publications.waset.org/abstracts/search?q=Vladimir%20P.%20Koba"> Vladimir P. Koba</a>, <a href="https://publications.waset.org/abstracts/search?q=Vladimir%20V.%20Papelbu"> Vladimir V. Papelbu</a>, <a href="https://publications.waset.org/abstracts/search?q=Vladimir%20N.%20Gerasimchuk"> Vladimir N. Gerasimchuk</a>, <a href="https://publications.waset.org/abstracts/search?q=Tatjana%20M.%20Sakhno"> Tatjana M. Sakhno</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Using a supersonic shaft–wood tomography, the evaluation of a shaft-wood phyto-pathogenic damage level of Sequoiadendron giganteum (Lindl.) Buccholz was prosecuted. The digital bivariate reflections of the shaft tissue damage were obtained, the characteristics of comparative parameters of the wood-decay degree were given. The investigation results allowed to show up the role of some edaphic factors in their affection on a vital condition and the level of destructive processes while shaft tissue damaging of S.giganteum. It was pinned up that soil consolidation, and hydro-morphication equally make for a phyto-pathogenic damage of plants. While soil consolidation negative acting the shaft-wood damage is located in an underneath of a shaft. In the conditions of an enlarged hydro-morphication a tissue degradation runs less intensively, the destructive processes more active spread in a vertical section of a shaft. The use of a supersonic tomography method gives wide possibilities to diagnose a shaft-wood phyto-pathogenic damage. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sequoiadendron%20giganteum%20%28Lindl.%29%20Buccholz" title="Sequoiadendron giganteum (Lindl.) Buccholz">Sequoiadendron giganteum (Lindl.) Buccholz</a>, <a href="https://publications.waset.org/abstracts/search?q=supersonic%20tomography" title=" supersonic tomography"> supersonic tomography</a>, <a href="https://publications.waset.org/abstracts/search?q=diagnosis" title=" diagnosis"> diagnosis</a>, <a href="https://publications.waset.org/abstracts/search?q=phyto-pathogenic%20damage" title=" phyto-pathogenic damage"> phyto-pathogenic damage</a>, <a href="https://publications.waset.org/abstracts/search?q=a%20vital%20condition" title=" a vital condition"> a vital condition</a> </p> <a href="https://publications.waset.org/abstracts/78879/an-acoustical-diagnosis-of-a-shaft-wood-phyto-pathogenic-damage-of-sequoiadendron-giganteum-lindl-buccholz" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/78879.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">213</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">799</span> Investigation for the Mechanism of Lateral-Torsional Coupled Vibration of the Propulsion Shaft in a Ship</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hyungsuk%20Han">Hyungsuk Han</a>, <a href="https://publications.waset.org/abstracts/search?q=Soohong%20Jeon"> Soohong Jeon</a>, <a href="https://publications.waset.org/abstracts/search?q=Chungwon%20Lee"> Chungwon Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=YongHoon%20Kim"> YongHoon Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> When a rubber mount and flexible coupling are installed on the main engine, high torsional vibration can occur. The root cause of this high torsional vibration can be attributed to the lateral-torsional coupled vibration of the shaft system. Therefore, the lateral-torsional coupled vibration is investigated numerically after approximating the shaft system to a three-degrees-of-freedom Jeffcott rotor. To verify that the high torsional vibration is caused by the lateral-torsional coupled vibration, a test unit that can simulate this lateral-torsional coupled vibration occurring in the propulsion shaft is developed. Performing a vibration test with the test unit, it can be experimentally verified that the high torsional vibration occurring in the propulsion shaft of the particular ship was caused by the lateral-torsional coupled vibration. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jeffcott%20rotor" title="Jeffcott rotor">Jeffcott rotor</a>, <a href="https://publications.waset.org/abstracts/search?q=lateral-torsional%20coupled%20vibration" title=" lateral-torsional coupled vibration"> lateral-torsional coupled vibration</a>, <a href="https://publications.waset.org/abstracts/search?q=propulsion%20shaft" title=" propulsion shaft"> propulsion shaft</a>, <a href="https://publications.waset.org/abstracts/search?q=stability" title=" stability"> stability</a> </p> <a href="https://publications.waset.org/abstracts/107458/investigation-for-the-mechanism-of-lateral-torsional-coupled-vibration-of-the-propulsion-shaft-in-a-ship" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/107458.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">227</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">798</span> Productivity Improvement in the Propeller Shaft Manufacturing Process </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Won%20Jung">Won Jung</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In automotive, propeller shaft is the device for transferring power from engine to axle via transmission, and the slip yoke is one of the main parts in the component. Since the propeller shafts are subject to torsion and shear stress, they need to be strong enough to bear the stress. The purpose of this research is to improve the productivity of slip yoke for automotive propeller shaft. We present how to redesign the component that currently manufactured as a forged single body type. The research was focused on not only reducing processing time but insuring durability of the component simultaneously. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=automotive" title="automotive">automotive</a>, <a href="https://publications.waset.org/abstracts/search?q=propeller%20shaft" title=" propeller shaft"> propeller shaft</a>, <a href="https://publications.waset.org/abstracts/search?q=productivity" title=" productivity"> productivity</a>, <a href="https://publications.waset.org/abstracts/search?q=durability" title=" durability"> durability</a>, <a href="https://publications.waset.org/abstracts/search?q=slip%20yoke" title=" slip yoke"> slip yoke</a> </p> <a href="https://publications.waset.org/abstracts/17015/productivity-improvement-in-the-propeller-shaft-manufacturing-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17015.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">378</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">797</span> Micro-CT Assessment of Fracture Healing in Androgen-Deficient Osteoporosis Model</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20N.%20Shuid">Ahmad N. Shuid</a>, <a href="https://publications.waset.org/abstracts/search?q=Azri%20Jalil"> Azri Jalil</a>, <a href="https://publications.waset.org/abstracts/search?q=Sabarul%20A.%20Mokhtar"> Sabarul A. Mokhtar</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohd%20F.%20Khamis"> Mohd F. Khamis</a>, <a href="https://publications.waset.org/abstracts/search?q=Norliza%20Muhammad"> Norliza Muhammad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Micro-CT provides a 3-D image of fracture callus, which can be used to calculate quantitative parameters. In this study, micro-CT was used to assess the fracture healing of orchidectomised rats, an androgen-deficient osteoporosis model. The effect of testosterone (hormone replacement) on fracture healing was also assessed with micro-CT. The rats were grouped into orchidectomised-control (ORX), sham-operated (SHAM), and orchidectomised; and injected with testosterone intramuscularly once weekly (TEN). Treatment duration was six weeks. The fracture was induced and fixed with plates and screws in the right tibia of all the rats. An in vitro micro-CT was used to scan the fracture callus area which consisted of 100 axial slices above and below fracture line. The analysis has shown that micro-CT was able to detect a significant difference in the fracture healing rate of ORX and TEN groups. In conclusion, micro-CT can be used to assess fracture healing in androgen-deficient osteoporosis. This imaging tool can be used to test agents that influence fracture healing in the androgen-deficient model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=androgen" title="androgen">androgen</a>, <a href="https://publications.waset.org/abstracts/search?q=fracture" title=" fracture"> fracture</a>, <a href="https://publications.waset.org/abstracts/search?q=orchidectomy" title=" orchidectomy"> orchidectomy</a>, <a href="https://publications.waset.org/abstracts/search?q=osteoporosis" title=" osteoporosis "> osteoporosis </a> </p> <a href="https://publications.waset.org/abstracts/33626/micro-ct-assessment-of-fracture-healing-in-androgen-deficient-osteoporosis-model" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33626.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">545</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">796</span> Effect of Size and Soil Characteristic on Contribution of Side and Tip Resistance of the Drilled Shafts Axial Load Carrying Capacity </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mehrak%20Zargaryaeghoubi">Mehrak Zargaryaeghoubi</a>, <a href="https://publications.waset.org/abstracts/search?q=Masood%20Hajali"> Masood Hajali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Drilled shafts are the most popular of deep foundations, because they have the capability that one single shaft can easily carry the entire load of a large column from a bridge or tall building. Drilled shaft may be an economical alternative to pile foundations because a pile cap is not needed, which not only reduces that expense, but also provides a rough surface in the border of soil and concrete to carry a more axial load. Due to the larger construction sizes of drilled shafts, they have an excellent axial load carrying capacity. Part of the axial load carrying capacity of the drilled shaft is resisted by the soil below the tip of the shaft which is tip resistance and the other part is resisted by the friction developed around the drilled shaft which is side resistance. The condition at the bottom of the excavation can affect the end bearing capacity of the drilled shaft. Also, type of the soil and size of the drilled shaft can affect the frictional resistance. The main loads applied on the drilled shafts are axial compressive loads. It is important to know how many percent of the maximum applied load will be shed inside friction and how much will be transferred to the base. The axial capacity of the drilled shaft foundation is influenced by the size of the drilled shaft, and soil characteristics. In this study, the effect of the size and soil characteristic will be investigated on the contribution of side resistance and end-bearing capacity. Also, the study presents a three-dimensional finite element modeling of a drilled shaft subjected to axial load using ANSYS. The top displacement and settlement of the drilled shaft are verified with analytical results. The soil profile is considered as Table 1 and for a drilled shaft with 7 ft diameter and 95 ft length the stresses in z-direction are calculated through the length of the shaft. From the stresses in z-direction through the length of the shaft the side resistance can be calculated and with the z-direction stress at the tip, the tip resistance can be calculated. The result of the side and tip resistance for this drilled shaft are compared with the analytical results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Drilled%20Shaft%20Foundation" title="Drilled Shaft Foundation">Drilled Shaft Foundation</a>, <a href="https://publications.waset.org/abstracts/search?q=size%20and%20soil%20characteristic" title=" size and soil characteristic"> size and soil characteristic</a>, <a href="https://publications.waset.org/abstracts/search?q=axial%20load%20capacity" title=" axial load capacity"> axial load capacity</a>, <a href="https://publications.waset.org/abstracts/search?q=Finite%20Element" title=" Finite Element"> Finite Element</a> </p> <a href="https://publications.waset.org/abstracts/16215/effect-of-size-and-soil-characteristic-on-contribution-of-side-and-tip-resistance-of-the-drilled-shafts-axial-load-carrying-capacity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16215.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">379</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">795</span> Design and Performance of a Large Diameter Shaft in Old Alluvium</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tamilmani%20Thiruvengadam">Tamilmani Thiruvengadam</a>, <a href="https://publications.waset.org/abstracts/search?q=Ramasthanan%20Arulampalam"> Ramasthanan Arulampalam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This project comprises laying approximately 1.8km of 400mm, 1200mm and 2400mm diameter sewer pipes using pipe jacking machines along Mugliston Park, Buangkok Drive, and Buangkok Link. The works include an estimated 14 circular shafts with depth ranging from 10.0 meters to 29.0 meters. Cast in-situ circular shaft will be used for the temporary shaft excavation. The geology is predominantly Backfill and old alluvium with weak material encountered in between. Where there is a very soft clay, F1 material or weak soil is expected, ground improvement will be carried out outside of the shaft followed by cast in-situ concrete ring wall within the improved soil zone. This paper presents the design methodology, analysis and results of temporary shafts for micro TBM launching and constructing permanent manholes. There is also a comparison of instrumentation readings with the analysis predicted values. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=circular%20shaft" title="circular shaft">circular shaft</a>, <a href="https://publications.waset.org/abstracts/search?q=ground%20improvement" title=" ground improvement"> ground improvement</a>, <a href="https://publications.waset.org/abstracts/search?q=old%20alluvium" title=" old alluvium"> old alluvium</a>, <a href="https://publications.waset.org/abstracts/search?q=temporary%20shaft" title=" temporary shaft"> temporary shaft</a> </p> <a href="https://publications.waset.org/abstracts/65270/design-and-performance-of-a-large-diameter-shaft-in-old-alluvium" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/65270.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">287</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">794</span> Analytical Method for Seismic Analysis of Shaft-Tunnel Junction under Longitudinal Excitations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jinghua%20Zhang">Jinghua Zhang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Shaft-tunnel junction is a typical case of the structural nonuniformity in underground structures. The shaft and the tunnel possess greatly different structural features. Even under uniform excitations, they tend to behave discrepantly. Studies on shaft-tunnel junctions are mainly performed numerically. Shaking table tests are also conducted. Although many numerical and experimental data are obtained, an analytical solution still has great merits of gaining more insights into the shaft-tunnel problem. This paper will try to remedy the situation. Since the seismic responses of shaft-tunnel junctions are very related to directions of the excitations, they are studied in two scenarios: the longitudinal-excitation scenario and the transverse-excitation scenario. The former scenario will be addressed in this paper. Given that responses of the tunnel are highly dependent on the shaft, the analytical solutions would be developed firstly for the vertical shaft. Then, the seismic responses of the tunnel would be discussed. Since vertical shafts bear a resemblance to rigid caissons, the solution proposed in this paper is derived by introducing terms of shaft-tunnel and soil-tunnel interactions into equations originally developed for rigid caissons. The validity of the solution is examined by a validation model computed by finite element method. The mutual influence between the shaft and the tunnel is introduced. The soil-structure interactions are discussed parametrically based on the proposed equations. The shaft-tunnel relative displacement and the soil-tunnel relative stiffness are found to be the most important parameters affecting the magnitudes and distributions of the internal forces of the tunnel. A hinge-joint at the shaft-tunnel junction could significantly reduce the degree of stress concentration compared with a rigid joint. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=analytical%20solution" title="analytical solution">analytical solution</a>, <a href="https://publications.waset.org/abstracts/search?q=longitudinal%20excitation" title=" longitudinal excitation"> longitudinal excitation</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20validation" title=" numerical validation "> numerical validation </a>, <a href="https://publications.waset.org/abstracts/search?q=shaft-tunnel%20junction" title=" shaft-tunnel junction "> shaft-tunnel junction </a> </p> <a href="https://publications.waset.org/abstracts/112550/analytical-method-for-seismic-analysis-of-shaft-tunnel-junction-under-longitudinal-excitations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/112550.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">160</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">793</span> Numerical Analysis of Effect of Crack Location on the Crack Breathing Behavior</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20M.%20Mobarak">H. M. Mobarak</a>, <a href="https://publications.waset.org/abstracts/search?q=Helen%20Wu"> Helen Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Keqin%20Xiao"> Keqin Xiao </a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, a three-dimensional finite element model was developed to investigate the crack breathing behavior at different crack locations considering the effect of unbalance force. A two-disk rotor with a crack is simulated using ABAQUS. The duration of each crack status (open, closed and partially open/closed) during a full shaft rotation was examined to analyse the crack breathing behavior. Unbalanced shaft crack breathing behavior was found to be different at different crack locations. The breathing behavior of crack along the shaft length is divided into different regions depending on the unbalance force and crack location. The simulated results in this work can be further utilised to obtain the time-varying stiffness matrix of the cracked shaft element under the influence of unbalance force. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=crack%20breathing" title="crack breathing">crack breathing</a>, <a href="https://publications.waset.org/abstracts/search?q=crack%20location" title=" crack location"> crack location</a>, <a href="https://publications.waset.org/abstracts/search?q=slant%20crack" title=" slant crack"> slant crack</a>, <a href="https://publications.waset.org/abstracts/search?q=unbalance%20force" title=" unbalance force"> unbalance force</a>, <a href="https://publications.waset.org/abstracts/search?q=rotating%20shaft" title=" rotating shaft"> rotating shaft</a> </p> <a href="https://publications.waset.org/abstracts/83659/numerical-analysis-of-effect-of-crack-location-on-the-crack-breathing-behavior" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/83659.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">272</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">792</span> Analysis of Cyclic Elastic-Plastic Loading of Shaft Based on Kinematic Hardening Model</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Isa%20Ahmadi">Isa Ahmadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Ramin%20Khamedi"> Ramin Khamedi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the elasto-plastic and cyclic torsion of a shaft is studied using a finite element method. The Prager kinematic hardening theory of plasticity with the Ramberg and Osgood stress-strain equation is used to evaluate the cyclic loading behavior of the shaft under the torsional loading. The material of shaft is assumed to follow the non-linear strain hardening property based on the Prager model. The finite element method with C1 continuity is developed and used for solution of the governing equations of the problem. The successive substitution iterative method is used to calculate the distribution of stresses and plastic strains in the shaft due to cyclic loads. The shear stress, effective stress, residual stress and elastic and plastic shear strain distribution are presented in the numerical results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cyclic%20loading" title="cyclic loading">cyclic loading</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20analysis" title=" finite element analysis"> finite element analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=Prager%20kinematic%20hardening%20model" title=" Prager kinematic hardening model"> Prager kinematic hardening model</a>, <a href="https://publications.waset.org/abstracts/search?q=torsion%20of%20shaft" title=" torsion of shaft"> torsion of shaft</a> </p> <a href="https://publications.waset.org/abstracts/10130/analysis-of-cyclic-elastic-plastic-loading-of-shaft-based-on-kinematic-hardening-model" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10130.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">408</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">791</span> Age Determination from Epiphyseal Union of Bones at Shoulder Joint in Girls of Central India</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=B.%20Tirpude">B. Tirpude</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Surwade"> V. Surwade</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Murkey"> P. Murkey</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Wankhade"> P. Wankhade</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Meena"> S. Meena </a> </p> <p class="card-text"><strong>Abstract:</strong></p> There is no statistical data to establish variation in epiphyseal fusion in girls in central India population. This significant oversight can lead to exclusion of persons of interest in a forensic investigation. Epiphyseal fusion of proximal end of humerus in eighty females were analyzed on radiological basis to assess the range of variation of epiphyseal fusion at each age. In the study, the X ray films of the subjects were divided into three groups on the basis of degree of fusion. Firstly, those which were showing No Epiphyseal Fusion (N), secondly those showing Partial Union (PC), and thirdly those showing Complete Fusion (C). Observations made were compared with the previous studies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=epiphyseal%20union" title="epiphyseal union">epiphyseal union</a>, <a href="https://publications.waset.org/abstracts/search?q=shoulder%20joint" title=" shoulder joint"> shoulder joint</a>, <a href="https://publications.waset.org/abstracts/search?q=proximal%20end%20of%20humerus" title=" proximal end of humerus"> proximal end of humerus</a> </p> <a href="https://publications.waset.org/abstracts/19684/age-determination-from-epiphyseal-union-of-bones-at-shoulder-joint-in-girls-of-central-india" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19684.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">495</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">790</span> Failure Analysis of Recoiler Mandrel Shaft Used for Coiling of Rolled Steel Sheet</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sachin%20Pawar">Sachin Pawar</a>, <a href="https://publications.waset.org/abstracts/search?q=Suman%20Patra"> Suman Patra</a>, <a href="https://publications.waset.org/abstracts/search?q=Goutam%20Mukhopadhyay"> Goutam Mukhopadhyay</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The primary function of a shaft is to transfer power. The shaft can be cast or forged and then machined to the final shape. Manufacturing of ~5 m length and 0.6 m diameter shaft is very critical. More difficult is to maintain its straightness during heat treatment and machining operations, which involve thermal and mechanical loads, respectively. During the machining operation of a such forged mandrel shaft, a deflection of 3-4mm was observed. To remove this deflection shaft was pressed at both ends which led to the development of cracks in it. To investigate the root cause of the deflection and cracking, the sample was cut from the failed shaft. Possible causes were identified with the help of a cause and effect diagram. Chemical composition analysis, microstructural analysis, and hardness measurement were done to confirm whether the shaft meets the required specifications or not. Chemical composition analysis confirmed that the material grade was 42CrMo4. Microstructural analysis revealed the presence of untempered martensite, indicating improper heat treatment. Due to this, ductility and impact toughness values were considerably lower than the specification of the mentioned grade. Residual stress measurement of one more bent shaft manufactured by a similar route was done by portable X-ray diffraction(XRD) technique. For better understanding, measurements were done at twelve different locations along the length of the shaft. The occurrence of a high amount of undesirable tensile residual stresses close to the Ultimate Tensile Strength(UTS) of the material was observed. Untempered martensitic structure, lower ductility, lower impact strength, and presence of a high amount of residual stresses all confirmed the improper tempering heat treatment of the shaft. Tempering relieves the residual stresses. Based on the findings of this study, stress-relieving heat treatment was done to remove the residual stresses and deflection in the shaft successfully. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=residual%20stress" title="residual stress">residual stress</a>, <a href="https://publications.waset.org/abstracts/search?q=mandrel%20shaft" title=" mandrel shaft"> mandrel shaft</a>, <a href="https://publications.waset.org/abstracts/search?q=untempered%20martensite" title=" untempered martensite"> untempered martensite</a>, <a href="https://publications.waset.org/abstracts/search?q=portable%20XRD" title=" portable XRD"> portable XRD</a> </p> <a href="https://publications.waset.org/abstracts/107065/failure-analysis-of-recoiler-mandrel-shaft-used-for-coiling-of-rolled-steel-sheet" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/107065.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">112</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">789</span> Fracture Dislocation of Upper Sacrum in an Adolescent: Case Report and Review of Literature</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Alireza%20Mirghasemi">S. Alireza Mirghasemi</a>, <a href="https://publications.waset.org/abstracts/search?q=Narges%20Rahimi%20Gabaran"> Narges Rahimi Gabaran</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Although sacral fractures in children are rare due to the fact that the occurrence of pelvic fracture is not common in childhood. Sacral fractures present a high risk of neurological damage. This kind of fracture is often missed because the routine pelvic X-rays imaging scarcely show this fracture. Also, the treatment is controversial, and it ranges from fine reduction to conservative treatments without any try to reduce the dislocation. In this article, a case of fracture dislocation of S1 and S2 along with a suggested diagnostic test and treatment based on similar cases are presented. The case investigates a 14-year-old boy who entered the hospital one week after a car accident that knocked him to the ground in crawling position and a rack fell down on his body. Pain and tenderness in the sacral region and a fracture in the left leg were notable--we detected incomplete bilateral palsy of L5, S1 and S2 roots. In radiographs of the spine fracture dislocation of S1, the sacral fracture was seen. The treatment included a skeletal traction with a halo over the patient’s head and two femoral pins. After one week, another surgery was performed in order to stabilize and reduce the fracture, and we employed a posterior approach with CD and a pedicular screw. After two years of follow-up, the fracture is completely cured without any loss of reduction. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adolescent" title="adolescent">adolescent</a>, <a href="https://publications.waset.org/abstracts/search?q=fracture%20in%20adolescent" title=" fracture in adolescent"> fracture in adolescent</a>, <a href="https://publications.waset.org/abstracts/search?q=fracture%20dislocation" title=" fracture dislocation"> fracture dislocation</a>, <a href="https://publications.waset.org/abstracts/search?q=sacrum" title=" sacrum"> sacrum</a> </p> <a href="https://publications.waset.org/abstracts/34780/fracture-dislocation-of-upper-sacrum-in-an-adolescent-case-report-and-review-of-literature" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34780.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">292</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">788</span> Failure Analysis of Fractured Dental Implants</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rajesh%20Bansal">Rajesh Bansal</a>, <a href="https://publications.waset.org/abstracts/search?q=Amit%20Raj%20Sharma"> Amit Raj Sharma</a>, <a href="https://publications.waset.org/abstracts/search?q=Vakil%20Singh"> Vakil Singh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The success and predictability of titanium implants for long durations are well established and there has been a tremendous increase in the popularity of implants among patients as well as clinicians over the last four decades. However, sometimes complications arise, which lead to the loss of the implant as well as the prosthesis. Fracture of dental implants is rare; however, at times, implants or abutment screws fracture and lead to many problems for the clinician and the patient. Possible causes of implant fracture include improper design, overload, fatigue and corrosion. Six retrieved fractured dental implants, with varying diameters and designs, were collected from time to time to examine by scanning electron microscope (SEM) to characterize fracture behavior and assess the mechanism of fracture. In this investigation, it was observed that fracture of the five dental implants occurred due to fatigue crack initiation and propagation from the thread roots. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=titanium" title="titanium">titanium</a>, <a href="https://publications.waset.org/abstracts/search?q=dental" title=" dental"> dental</a>, <a href="https://publications.waset.org/abstracts/search?q=implant" title=" implant"> implant</a>, <a href="https://publications.waset.org/abstracts/search?q=fracture" title=" fracture"> fracture</a>, <a href="https://publications.waset.org/abstracts/search?q=failure" title=" failure"> failure</a> </p> <a href="https://publications.waset.org/abstracts/171204/failure-analysis-of-fractured-dental-implants" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/171204.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">81</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">787</span> Failure Analysis and Fatigue Life Estimation of a Shaft of a Rotary Draw Bending Machine </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=B.%20Engel">B. Engel</a>, <a href="https://publications.waset.org/abstracts/search?q=Sara%20Salman%20Hassan%20Al-Maeeni"> Sara Salman Hassan Al-Maeeni </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Human consumption of the Earth's resources increases the need for a sustainable development as an important ecological, social, and economic theme. Re-engineering of machine tools, in terms of design and failure analysis, is defined as steps performed on an obsolete machine to return it to a new machine with the warranty that matches the customer requirement. To understand the future fatigue behavior of the used machine components, it is important to investigate the possible causes of machine parts failure through design, surface, and material inspections. In this study, the failure modes of the shaft of the rotary draw bending machine are inspected. Furthermore, stress and deflection analysis of the shaft subjected to combined torsion and bending loads are carried out by an analytical method and compared with a finite element analysis method. The theoretical fatigue strength, correction factors, and fatigue life sustained by the shaft before damaged are estimated by creating a stress-cycle (S-N) diagram. In conclusion, it is seen that the shaft can work in the second life, but it needs some surface treatments to increase the reliability and fatigue life. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=failure%20analysis" title="failure analysis">failure analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=fatigue%20life" title=" fatigue life"> fatigue life</a>, <a href="https://publications.waset.org/abstracts/search?q=FEM%20analysis" title=" FEM analysis"> FEM analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=shaft" title=" shaft"> shaft</a>, <a href="https://publications.waset.org/abstracts/search?q=stress%20analysis" title=" stress analysis"> stress analysis</a> </p> <a href="https://publications.waset.org/abstracts/79871/failure-analysis-and-fatigue-life-estimation-of-a-shaft-of-a-rotary-draw-bending-machine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/79871.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">301</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">786</span> Shaft Friction of Bored Pile Socketed in Weathered Limestone in Qatar</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Thanawat%20Chuleekiat">Thanawat Chuleekiat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Socketing of bored piles in rock is always seen as a matter of debate on construction sites between consultants and contractors. The socketing depth normally depends on the type of rock, depth at which the rock is available below the pile cap and load carrying capacity of the pile. In this paper, the review of field load test data of drilled shaft socketed in weathered limestone conducted using conventional static pile load test and dynamic pile load test was made to evaluate a unit shaft friction for the bored piles socketed in weathered limestone (weak rock). The borehole drilling data were also reviewed in conjunction with the pile test result. In addition, the back-calculated unit shaft friction was reviewed against various empirical methods for bored piles socketed in weak rock. The paper concludes with an estimated ultimate unit shaft friction from the case study in Qatar for preliminary design. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=piled%20foundation" title="piled foundation">piled foundation</a>, <a href="https://publications.waset.org/abstracts/search?q=weathered%20limestone" title=" weathered limestone"> weathered limestone</a>, <a href="https://publications.waset.org/abstracts/search?q=shaft%20friction" title=" shaft friction"> shaft friction</a>, <a href="https://publications.waset.org/abstracts/search?q=rock%20socket" title=" rock socket"> rock socket</a>, <a href="https://publications.waset.org/abstracts/search?q=pile%20load%20test" title=" pile load test"> pile load test</a> </p> <a href="https://publications.waset.org/abstracts/92705/shaft-friction-of-bored-pile-socketed-in-weathered-limestone-in-qatar" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/92705.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">180</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">785</span> Model of Elastic Fracture Toughness for Ductile Metal Pipes with External Longitudinal Cracks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Guoyang%20Fu">Guoyang Fu</a>, <a href="https://publications.waset.org/abstracts/search?q=Wei%20Yang"> Wei Yang</a>, <a href="https://publications.waset.org/abstracts/search?q=Chun-Qing%20Li"> Chun-Qing Li</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The most common type of cracks that appear on metal pipes is longitudinal cracks. For ductile metal pipes, the existence of plasticity eases the stress intensity at the crack front and consequently increases the fracture resistance. It should be noted that linear elastic fracture mechanics (LEFM) has been widely accepted by engineers. In order to make the LEFM applicable to ductile metal materials, the increase of fracture toughness due to plasticity should be excluded from the total fracture toughness of the ductile metal. This paper aims to develop a model of elastic fracture toughness for ductile metal pipes with external longitudinal cracks. The derived elastic fracture toughness is a function of crack geometry and material properties of the cracked pipe. The significance of the derived model is that the well-established LEFM can be used for ductile metal material in predicting the fracture failure. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ductile%20metal%20pipes" title="Ductile metal pipes">Ductile metal pipes</a>, <a href="https://publications.waset.org/abstracts/search?q=elastic%20fracture%20toughness" title=" elastic fracture toughness"> elastic fracture toughness</a>, <a href="https://publications.waset.org/abstracts/search?q=longitudinal%20crack" title=" longitudinal crack"> longitudinal crack</a>, <a href="https://publications.waset.org/abstracts/search?q=plasticity" title=" plasticity"> plasticity</a> </p> <a href="https://publications.waset.org/abstracts/79581/model-of-elastic-fracture-toughness-for-ductile-metal-pipes-with-external-longitudinal-cracks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/79581.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">247</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">784</span> Design and Analysis of a Laminated Composite Automotive Drive Shaft</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hossein%20Kh.%20Bisheh">Hossein Kh. Bisheh</a>, <a href="https://publications.waset.org/abstracts/search?q=Nan%20Wu"> Nan Wu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Advanced composite materials have a great importance in engineering structures due to their high specific modulus and strength and low weight. These materials can be used in design and fabrication of automotive drive shafts to reduce the weight of the structure. Hence, an optimum design of a composite drive shaft satisfying the design criteria, can be an appropriate substitution of metallic drive shafts. The aim of this study is to design and analyze a composite automotive drive shaft with high specific strength and low weight satisfying the design criteria. Tsai-Wu criterion is chosen as the failure criterion. Various designs with different lay-ups and materials are investigated based on the design requirements and finally, an optimum design satisfying the design criteria is chosen based on the weight and cost considerations. The results of this study indicate that if the weight is the main concern, a shaft made of Carbon/Epoxy can be a good option, and if the cost is a more important parameter, a hybrid shaft made of aluminum and Carbon/Epoxy can be considered. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bending%20natural%20frequency" title="Bending natural frequency">Bending natural frequency</a>, <a href="https://publications.waset.org/abstracts/search?q=Composite%20drive%20shaft" title=" Composite drive shaft"> Composite drive shaft</a>, <a href="https://publications.waset.org/abstracts/search?q=Peak%20torque" title=" Peak torque"> Peak torque</a>, <a href="https://publications.waset.org/abstracts/search?q=Torsional%20buckling" title=" Torsional buckling"> Torsional buckling</a> </p> <a href="https://publications.waset.org/abstracts/96457/design-and-analysis-of-a-laminated-composite-automotive-drive-shaft" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/96457.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">232</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">783</span> Socio-Economic Problems in Treatment of Non-Union Both Bones Fracture of the Leg: A Retrospective Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rajendra%20Kumar%20Kanojia">Rajendra Kumar Kanojia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Treatment of fracture both bones of leg following trauma is done intially at nearby primary health care center.primary management for shock,pain,control of bleeding,plaster application. These are treated for primay fixation of fracture, debridment of wound. Then, they were refered to tertiary care where they were again and planned for further treatment. This leads to loss of lot of time, money, job, etc. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fracture%20both%20bones%20leg" title="fracture both bones leg">fracture both bones leg</a>, <a href="https://publications.waset.org/abstracts/search?q=non-union" title=" non-union"> non-union</a>, <a href="https://publications.waset.org/abstracts/search?q=ilizarov" title=" ilizarov"> ilizarov</a>, <a href="https://publications.waset.org/abstracts/search?q=cost" title=" cost"> cost</a> </p> <a href="https://publications.waset.org/abstracts/19616/socio-economic-problems-in-treatment-of-non-union-both-bones-fracture-of-the-leg-a-retrospective-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19616.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">570</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">782</span> Stability of a Self-Excited Machine Due to the Mechanical Coupling </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Soltan%20Rezaee">M. Soltan Rezaee</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20R.%20Ghazavi"> M. R. Ghazavi</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Najafi"> A. Najafi</a>, <a href="https://publications.waset.org/abstracts/search?q=W.-H.%20Liao"> W.-H. Liao</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Generally, different rods in shaft systems can be misaligned based on the mechanical system usages. These rods can be linked together via U-coupling easily. The system is self-stimulated and may cause instabilities due to the inherent behavior of the coupling. In this study, each rod includes an elastic shaft with an angular stiffness and structural damping. Moreover, the mass of shafts is considered via attached solid disks. The impact of the system architecture and shaft mass on the instability of such mechanism are studied. Stability charts are plotted via a method based on Floquet theory. Eventually, the unstable points have been found and analyzed in detail. The results show that stabilizing the driveline is feasible by changing the system characteristics which include shaft mass and architecture. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coupling" title="coupling">coupling</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20systems" title=" mechanical systems"> mechanical systems</a>, <a href="https://publications.waset.org/abstracts/search?q=oscillations" title=" oscillations"> oscillations</a>, <a href="https://publications.waset.org/abstracts/search?q=rotating%20shafts" title=" rotating shafts"> rotating shafts</a> </p> <a href="https://publications.waset.org/abstracts/98061/stability-of-a-self-excited-machine-due-to-the-mechanical-coupling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/98061.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">180</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">781</span> Natural Frequency Analysis of a Porous Functionally Graded Shaft System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Natural%20Frequency%20Analysis%20of%20a%20Porous%20Functionally%20Graded%20Shaft%20System">Natural Frequency Analysis of a Porous Functionally Graded Shaft System</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The vibration characteristics of a functionally graded (FG) rotor model having porosities and micro-voids is investigated using three-dimensional finite element analysis. The FG shaft is mounted with a steel disc located at the midspan. The shaft ends are supported on isotropic bearings. The FG material is composed of a metallic (stainless-steel) and ceramic phase (zirconium oxide) as its constituent phases. The layer wise material property variation is governed by power law. Material property equations are developed for the porosity modelling. Python code is developed to assign the material properties to each layer including the effect of porosities. ANSYS commercial software is used to extract the natural frequencies and whirl frequencies for the FG shaft system. The obtained results show the influence of porosity volume fraction and power-law index, on the vibration characteristics of the ceramic-based FG shaft system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Finite%20element%20method" title="Finite element method">Finite element method</a>, <a href="https://publications.waset.org/abstracts/search?q=Functionally%20graded%20material" title=" Functionally graded material"> Functionally graded material</a>, <a href="https://publications.waset.org/abstracts/search?q=Porosity%20volume%20fraction" title=" Porosity volume fraction"> Porosity volume fraction</a>, <a href="https://publications.waset.org/abstracts/search?q=Power%20law" title=" Power law"> Power law</a> </p> <a href="https://publications.waset.org/abstracts/123449/natural-frequency-analysis-of-a-porous-functionally-graded-shaft-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/123449.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">205</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=humerus%20shaft%20fracture&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=humerus%20shaft%20fracture&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=humerus%20shaft%20fracture&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=humerus%20shaft%20fracture&page=5">5</a></li> 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