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sheet</title> <meta name="description" content="Search results for: bed sheet"> <meta name="keywords" content="bed sheet"> <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 d-lg-none navbar-toggler ml-auto" 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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="bed sheet"> <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> 509</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: bed sheet</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">509</span> Simulation of the Effect of Sea Water using Ground Tank to the Flexural Capacity of GFRP Sheet Reinforced Concrete Beams</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rudy%20Djamaluddin">Rudy Djamaluddin</a>, <a href="https://publications.waset.org/abstracts/search?q=Arbain%20Tata"> Arbain Tata</a>, <a href="https://publications.waset.org/abstracts/search?q=Rita%20Irmawaty"> Rita Irmawaty</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The study conducted a simulation of the effect of sea water to the bonding capacity of GFRP sheet on the concrete beams using a simulation tank. As it well known that, fiber reinforced polymer (FRP) has been applied to many purposes for civil engineering structures not only for new structures but also for strengthening of the deteriorated structures. The FRP has advantages such as its corrosion resistance, as well as high tensile strength, to weight ratio. Glass composed FRP (GFRP) sheet is most commonly used due to its relatively lower cost compared to the other FRP materials. GFRP sheet is applied externally by bonding it on the concrete surface. Many studies have been done to investigate the bonding of GFRP sheet. However, it is still very rarely studies on the effect of sea water to the bonding capacity of GFRP sheet on the strengthened beams due to flexural loadings. This is important to be clarified for the wider application of GFRP sheet especially on the flexural structure that directly contact to the sea environment. To achieve the objective of the study, a series of concrete beams strengthened with GFRP sheet on extreme tension surface were prepared. The beams then were stored on the sea water tank for six months. Results indicated the bonding capacity decreased after six months exposed to the sea water. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=GFRP%20sheet" title="GFRP sheet">GFRP sheet</a>, <a href="https://publications.waset.org/abstracts/search?q=sea%20water" title=" sea water"> sea water</a>, <a href="https://publications.waset.org/abstracts/search?q=concrete%20beams" title=" concrete beams"> concrete beams</a>, <a href="https://publications.waset.org/abstracts/search?q=bonding" title=" bonding"> bonding</a> </p> <a href="https://publications.waset.org/abstracts/32243/simulation-of-the-effect-of-sea-water-using-ground-tank-to-the-flexural-capacity-of-gfrp-sheet-reinforced-concrete-beams" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32243.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">322</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">508</span> Towards a Complete Automation Feature Recognition System for Sheet Metal Manufacturing</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bahaa%20Eltahawy">Bahaa Eltahawy</a>, <a href="https://publications.waset.org/abstracts/search?q=Mikko%20Ylih%C3%A4rsil%C3%A4"> Mikko Ylihärsilä</a>, <a href="https://publications.waset.org/abstracts/search?q=Reino%20Virrankoski"> Reino Virrankoski</a>, <a href="https://publications.waset.org/abstracts/search?q=Esko%20Pet%C3%A4j%C3%A4"> Esko Petäjä</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Sheet metal processing is automated, but the step from product models to the production machine control still requires human intervention. This may cause time consuming bottlenecks in the production process and increase the risk of human errors. In this paper we present a system, which automatically recognizes features from the CAD-model of the sheet metal product. By using these features, the system produces a complete model of the particular sheet metal product. Then the model is used as an input for the sheet metal processing machine. Currently the system is implemented, capable to recognize more than 11 of the most common sheet metal structural features, and the procedure is fully automated. This provides remarkable savings in the production time, and protects against the human errors. This paper presents the developed system architecture, applied algorithms and system software implementation and testing. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=feature%20recognition" title="feature recognition">feature recognition</a>, <a href="https://publications.waset.org/abstracts/search?q=automation" title=" automation"> automation</a>, <a href="https://publications.waset.org/abstracts/search?q=sheet%20metal%20manufacturing" title=" sheet metal manufacturing"> sheet metal manufacturing</a>, <a href="https://publications.waset.org/abstracts/search?q=CAD" title=" CAD"> CAD</a>, <a href="https://publications.waset.org/abstracts/search?q=CAM" title=" CAM"> CAM</a> </p> <a href="https://publications.waset.org/abstracts/67850/towards-a-complete-automation-feature-recognition-system-for-sheet-metal-manufacturing" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/67850.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">354</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">507</span> Experimental Study and Analysis of Parabolic Trough Collector with Various Reflectors </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Avadhesh%20Yadav">Avadhesh Yadav</a>, <a href="https://publications.waset.org/abstracts/search?q=Balram%20Manoj%20Kumar"> Balram Manoj Kumar </a> </p> <p class="card-text"><strong>Abstract:</strong></p> A solar powered air heating system using parabolic trough collector was experimentally investigated. In this experimental setup, the reflected solar radiations were focused on absorber tube which was placed at focal length of the parabolic trough. In this setup, air was used as working fluid which collects the heat from absorber tube. To enhance the performance of parabolic trough, collector with different type of reflectors were used. It was observed for aluminum sheet maximum temperature is 52.3ºC, which 24.22% more than steel sheet as reflector and 8.5% more than aluminum foil as reflector, also efficiency by using Aluminum sheet as reflector compared to steel sheet as reflector is 61.18% more. Efficiency by using aluminum sheet as reflector compared to aluminum foil as reflector is 18.98% more. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=parabolic%20trough%20collector" title="parabolic trough collector">parabolic trough collector</a>, <a href="https://publications.waset.org/abstracts/search?q=reflectors" title=" reflectors"> reflectors</a>, <a href="https://publications.waset.org/abstracts/search?q=air%20flow%20rates" title=" air flow rates"> air flow rates</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20power" title=" solar power"> solar power</a>, <a href="https://publications.waset.org/abstracts/search?q=aluminum%20sheet" title=" aluminum sheet"> aluminum sheet</a> </p> <a href="https://publications.waset.org/abstracts/2172/experimental-study-and-analysis-of-parabolic-trough-collector-with-various-reflectors" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2172.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">360</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">506</span> Cost Effective Real-Time Image Processing Based Optical Mark Reader</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amit%20Kumar">Amit Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=Himanshu%20Singal"> Himanshu Singal</a>, <a href="https://publications.waset.org/abstracts/search?q=Arnav%20Bhavsar"> Arnav Bhavsar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this modern era of automation, most of the academic exams and competitive exams are Multiple Choice Questions (MCQ). The responses of these MCQ based exams are recorded in the Optical Mark Reader (OMR) sheet. Evaluation of the OMR sheet requires separate specialized machines for scanning and marking. The sheets used by these machines are special and costs more than a normal sheet. Available process is non-economical and dependent on paper thickness, scanning quality, paper orientation, special hardware and customized software. This study tries to tackle the problem of evaluating the OMR sheet without any special hardware and making the whole process economical. We propose an image processing based algorithm which can be used to read and evaluate the scanned OMR sheets with no special hardware required. It will eliminate the use of special OMR sheet. Responses recorded in normal sheet is enough for evaluation. The proposed system takes care of color, brightness, rotation, little imperfections in the OMR sheet images. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=OMR" title="OMR">OMR</a>, <a href="https://publications.waset.org/abstracts/search?q=image%20processing" title=" image processing"> image processing</a>, <a href="https://publications.waset.org/abstracts/search?q=hough%20circle%20trans-form" title=" hough circle trans-form"> hough circle trans-form</a>, <a href="https://publications.waset.org/abstracts/search?q=interpolation" title=" interpolation"> interpolation</a>, <a href="https://publications.waset.org/abstracts/search?q=detection" title=" detection"> detection</a>, <a href="https://publications.waset.org/abstracts/search?q=binary%20thresholding" title=" binary thresholding"> binary thresholding</a> </p> <a href="https://publications.waset.org/abstracts/98338/cost-effective-real-time-image-processing-based-optical-mark-reader" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/98338.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">173</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">505</span> Interface Analysis of Annealed Al/Cu Cladded Sheet</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Joon%20Ho%20Kim">Joon Ho Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Tae%20Kwon%20Ha"> Tae Kwon Ha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Effect of aging treatment on microstructural aspects of interfacial layers of the Cu/Al clad sheet produced by Differential Speed Rolling (DSR) process were studied by Electron Back Scattered Diffraction (EBSD). Clad sheet of Al/Cu has been fabricated by using DSR, which caused severe shear deformation between Al and Cu plate to easily bond to each other. Rolling was carried out at 100°C with speed ratio of 2, in which the total thickness reduction was 45%. Interface layers of clad sheet were analyzed by EBSD after subsequent annealing at 400°C for 30 to 120 min. With increasing annealing time, thickness of interface layer and fraction of high angle grain boundary were increased and average grain size was decreased. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aluminium%2Fcopper%20clad%20sheet" title="aluminium/copper clad sheet">aluminium/copper clad sheet</a>, <a href="https://publications.waset.org/abstracts/search?q=differential%20speed%20rolling" title=" differential speed rolling"> differential speed rolling</a>, <a href="https://publications.waset.org/abstracts/search?q=interface%20layer" title=" interface layer"> interface layer</a>, <a href="https://publications.waset.org/abstracts/search?q=microstructure" title=" microstructure"> microstructure</a>, <a href="https://publications.waset.org/abstracts/search?q=annealing" title=" annealing"> annealing</a>, <a href="https://publications.waset.org/abstracts/search?q=electron%20back%20scattered%20diffraction" title=" electron back scattered diffraction"> electron back scattered diffraction</a> </p> <a href="https://publications.waset.org/abstracts/7126/interface-analysis-of-annealed-alcu-cladded-sheet" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7126.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">366</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">504</span> Study on the Non-Contact Sheet Resistance Measuring of Silver Nanowire Coated Film Using Terahertz Wave</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dong-Hyun%20Kim">Dong-Hyun Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Wan-Ho%20Chung"> Wan-Ho Chung</a>, <a href="https://publications.waset.org/abstracts/search?q=Hak-Sung%20Kim"> Hak-Sung Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, non-destructive evaluation was conducted to measure the sheet resistance of silver nanowire coated film and find a damage of that film using terahertz (THz) wave. Pulse type THz instrument was used, and the measurement was performed under transmission and pitch-catch reflection modes with 30 degree of incidence angle. In the transmission mode, the intensity of the THz wave was gradually increased as the conductivity decreased. Meanwhile, the intensity of THz wave was decreased as the conductivity decreased in the pitch-catch reflection mode. To confirm the conductivity of the film, sheet resistance was measured by 4-point probe station. Interaction formula was drawn from a relation between the intensity and the sheet resistance. Through substituting sheet resistance to the formula and comparing the resultant value with measured maximum THz wave intensity, measurement of sheet resistance using THz wave was more suitable than that using 4-point probe station. In addition, the damage on the silver nanowire coated film was detected by applying the THz image system. Therefore, the reliability of the entire film can be also be ensured. In conclusion, real-time monitoring using the THz wave can be applied in the transparent electrodes with detecting the damaged area as well as measuring the sheet resistance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=terahertz%20wave" title="terahertz wave">terahertz wave</a>, <a href="https://publications.waset.org/abstracts/search?q=sheet%20resistance" title=" sheet resistance"> sheet resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=non-destructive%20evaluation" title=" non-destructive evaluation"> non-destructive evaluation</a>, <a href="https://publications.waset.org/abstracts/search?q=silver%20nanowire" title=" silver nanowire"> silver nanowire</a> </p> <a href="https://publications.waset.org/abstracts/20528/study-on-the-non-contact-sheet-resistance-measuring-of-silver-nanowire-coated-film-using-terahertz-wave" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20528.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">490</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">503</span> An Automatic Feature Extraction Technique for 2D Punch Shapes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Awais%20Ahmad%20Khan">Awais Ahmad Khan</a>, <a href="https://publications.waset.org/abstracts/search?q=Emad%20Abouel%20Nasr"> Emad Abouel Nasr</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20M.%20A.%20Hussein"> H. M. A. Hussein</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdulrahman%20Al-Ahmari"> Abdulrahman Al-Ahmari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Sheet-metal parts have been widely applied in electronics, communication and mechanical industries in recent decades; but the advancement in sheet-metal part design and manufacturing is still behind in comparison with the increasing importance of sheet-metal parts in modern industry. This paper presents a methodology for automatic extraction of some common 2D internal sheet metal features. The features used in this study are taken from Unipunch ™ catalogue. The extraction process starts with the data extraction from STEP file using an object oriented approach and with the application of suitable algorithms and rules, all features contained in the catalogue are automatically extracted. Since the extracted features include geometry and engineering information, they will be effective for downstream application such as feature rebuilding and process planning. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=feature%20extraction" title="feature extraction">feature extraction</a>, <a href="https://publications.waset.org/abstracts/search?q=internal%20features" title=" internal features"> internal features</a>, <a href="https://publications.waset.org/abstracts/search?q=punch%20shapes" title=" punch shapes"> punch shapes</a>, <a href="https://publications.waset.org/abstracts/search?q=sheet%20metal" title=" sheet metal"> sheet metal</a> </p> <a href="https://publications.waset.org/abstracts/45001/an-automatic-feature-extraction-technique-for-2d-punch-shapes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/45001.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">615</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">502</span> A Note on MHD Flow and Heat Transfer over a Curved Stretching Sheet by Considering Variable Thermal Conductivity </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20G.%20Murtaza">M. G. Murtaza</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20E.%20Tzirtzilakis"> E. E. Tzirtzilakis</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Ferdows"> M. Ferdows</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The mixed convective flow of MHD incompressible, steady boundary layer in heat transfer over a curved stretching sheet due to temperature dependent thermal conductivity is studied. We use curvilinear coordinate system in order to describe the governing flow equations. Finite difference solutions with central differencing have been used to solve the transform governing equations. Numerical results for the flow velocity and temperature profiles are presented as a function of the non-dimensional curvature radius. Skin friction coefficient and local Nusselt number at the surface of the curved sheet are discussed as well. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=curved%20stretching%20sheet" title="curved stretching sheet">curved stretching sheet</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20difference%20method" title=" finite difference method"> finite difference method</a>, <a href="https://publications.waset.org/abstracts/search?q=MHD" title=" MHD"> MHD</a>, <a href="https://publications.waset.org/abstracts/search?q=variable%20thermal%20conductivity" title=" variable thermal conductivity"> variable thermal conductivity</a> </p> <a href="https://publications.waset.org/abstracts/85972/a-note-on-mhd-flow-and-heat-transfer-over-a-curved-stretching-sheet-by-considering-variable-thermal-conductivity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/85972.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">194</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">501</span> Bearing Capacity of Sheet Hanger Connection to the Trapezoidal Metal Sheet</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kate%C5%99ina%20Jurdov%C3%A1">Kateřina Jurdová</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hanging to the trapezoidal sheet by decking hanger is a very widespread solution used in civil engineering to lead the distribution of energy, sanitary, air distribution system etc. under the roof or floor structure. The trapezoidal decking hanger is usually a part of the whole installation system for specific distribution medium. The leading companies offer installation systems for each specific distribution e.g. pipe rings, sprinkler systems, installation channels etc. Every specific part is connected to the base connector which is decking hanger. The own connection has three main components: decking hanger, threaded bar with nuts and web of trapezoidal sheet. The aim of this contribution is determinate the failure mechanism of each component in connection. Load bearing capacity of most components in connection could be calculated by formulas in European codes. This contribution is focused on problematic of bearing resistance of threaded bar in web of trapezoidal sheet. This issue is studied by experimental research and numerical modelling. This contribution presented the initial results of experiment which is compared with numerical model of specimen. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=decking%20hanger" title="decking hanger">decking hanger</a>, <a href="https://publications.waset.org/abstracts/search?q=concentrated%20load" title=" concentrated load"> concentrated load</a>, <a href="https://publications.waset.org/abstracts/search?q=connection" title=" connection"> connection</a>, <a href="https://publications.waset.org/abstracts/search?q=load%20bearing%20capacity" title=" load bearing capacity"> load bearing capacity</a>, <a href="https://publications.waset.org/abstracts/search?q=trapezoidal%20metal%20sheet" title=" trapezoidal metal sheet"> trapezoidal metal sheet</a> </p> <a href="https://publications.waset.org/abstracts/11314/bearing-capacity-of-sheet-hanger-connection-to-the-trapezoidal-metal-sheet" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11314.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">392</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">500</span> Hydro-Mechanical Forming of AZ31 Sheet</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yong-Nam%20Kwon">Yong-Nam Kwon</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the present study, we have designed the hydro-mechanical forming in which AZ31 sheet was drawn to a kind of preform step following gas blow forming for accurate geometry. In order to judge a formability enhancement of AZ31 sheet, model geometry came from a practical automotive part which had quite depth with complicated curvatures, which was proven that a single sheet forming could not gave a successful part. Experimentally, we succeeded to make the model part with accurate dimension. The optimum forming conditions for respective forming steps were considered most important technical features of this hydro-mechanical and would be discussed in details. Also, the effort to avoid detrimental abnormal grain growth was given and discussed for a practical application. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydro-mechanical%20forming" title="hydro-mechanical forming">hydro-mechanical forming</a>, <a href="https://publications.waset.org/abstracts/search?q=AZ31" title=" AZ31"> AZ31</a>, <a href="https://publications.waset.org/abstracts/search?q=abnormal%20grain%20growth" title=" abnormal grain growth"> abnormal grain growth</a>, <a href="https://publications.waset.org/abstracts/search?q=model%20geometry" title=" model geometry"> model geometry</a> </p> <a href="https://publications.waset.org/abstracts/9497/hydro-mechanical-forming-of-az31-sheet" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9497.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">511</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">499</span> Parametrical Simulation of Sheet Metal Forming Process to Control the Localized Thinning</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hatem%20Mrad">Hatem Mrad</a>, <a href="https://publications.waset.org/abstracts/search?q=Alban%20Notin"> Alban Notin</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Bouazara"> Mohamed Bouazara </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Sheet metal forming process has a multiple successive steps starting from sheets fixation to sheets evacuation. Often after forming operation, the sheet has defects requiring additional corrections steps. For example, in the drawing process, the formed sheet may have several defects such as springback, localized thinning and bends. All these defects are directly dependent on process, geometric and material parameters. The prediction and elimination of these defects requires the control of most sensitive parameters. The present study is concerned with a reliable parametric study of deep forming process in order to control the localized thinning. The proposed approach will be based on stochastic finite element method. Especially, the polynomial Chaos development will be used to establish a reliable relationship between input (process, geometric and material parameters) and output variables (sheet thickness). The commercial software Abaqus is used to conduct numerical finite elements simulations. The automatized parametrical modification is provided by coupling a FORTRAN routine, a PYTHON script and input Abaqus files. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=sheet%20metal%20forming" title="sheet metal forming">sheet metal forming</a>, <a href="https://publications.waset.org/abstracts/search?q=reliability" title=" reliability"> reliability</a>, <a href="https://publications.waset.org/abstracts/search?q=localized%20thinning" title=" localized thinning"> localized thinning</a>, <a href="https://publications.waset.org/abstracts/search?q=parametric%20simulation" title=" parametric simulation"> parametric simulation</a> </p> <a href="https://publications.waset.org/abstracts/8162/parametrical-simulation-of-sheet-metal-forming-process-to-control-the-localized-thinning" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8162.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">423</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">498</span> Flow and Heat Transfer over a Shrinking Sheet: A Stability Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Anuar%20Ishak">Anuar Ishak</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The characteristics of fluid flow and heat transfer over a permeable shrinking sheet is studied. The governing partial differential equations are transformed into a set of ordinary differential equations, which are then solved numerically using MATLAB routine boundary value problem solver bvp4c. Numerical results show that dual solutions are possible for a certain range of the suction parameter. A stability analysis is performed to determine which solution is linearly stable and physically realizable. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dual%20solutions" title="dual solutions">dual solutions</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer" title=" heat transfer"> heat transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=shrinking%20sheet" title=" shrinking sheet"> shrinking sheet</a>, <a href="https://publications.waset.org/abstracts/search?q=stability%20analysis" title=" stability analysis"> stability analysis</a> </p> <a href="https://publications.waset.org/abstracts/5803/flow-and-heat-transfer-over-a-shrinking-sheet-a-stability-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/5803.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">421</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">497</span> Effect of Gas Boundary Layer on the Stability of a Radially Expanding Liquid Sheet</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Soumya%20Kedia">Soumya Kedia</a>, <a href="https://publications.waset.org/abstracts/search?q=Puja%20Agarwala"> Puja Agarwala</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahesh%20Tirumkudulu"> Mahesh Tirumkudulu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Linear stability analysis is performed for a radially expanding liquid sheet in the presence of a gas medium. A liquid sheet can break up because of the aerodynamic effect as well as its thinning. However, the study of the aforementioned effects is usually done separately as the formulation becomes complicated and is difficult to solve. Present work combines both, aerodynamic effect and thinning effect, ignoring the non-linearity in the system. This is done by taking into account the formation of the gas boundary layer whilst neglecting viscosity in the liquid phase. Axisymmetric flow is assumed for simplicity. Base state analysis results in a Blasius-type system which can be solved numerically. Perturbation theory is then applied to study the stability of the liquid sheet, where the gas-liquid interface is subjected to small deformations. The linear model derived here can be applied to investigate the instability for sinuous as well as varicose modes, where the former represents displacement in the centerline of the sheet and the latter represents modulation in sheet thickness. Temporal instability analysis is performed for sinuous modes, which are significantly more unstable than varicose modes, for a fixed radial distance implying local stability analysis. The growth rates, measured for fixed wavenumbers, predicated by the present model are significantly lower than those obtained by the inviscid Kelvin-Helmholtz instability and compare better with experimental results. Thus, the present theory gives better insight into understanding the stability of a thin liquid sheet. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=boundary%20layer" title="boundary layer">boundary layer</a>, <a href="https://publications.waset.org/abstracts/search?q=gas-liquid%20interface" title=" gas-liquid interface"> gas-liquid interface</a>, <a href="https://publications.waset.org/abstracts/search?q=linear%20stability" title=" linear stability"> linear stability</a>, <a href="https://publications.waset.org/abstracts/search?q=thin%20liquid%20sheet" title=" thin liquid sheet"> thin liquid sheet</a> </p> <a href="https://publications.waset.org/abstracts/139722/effect-of-gas-boundary-layer-on-the-stability-of-a-radially-expanding-liquid-sheet" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/139722.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">229</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">496</span> A Mathematical Based Prediction of the Forming Limit of Thin-Walled Sheet Metals</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Masoud%20Ghermezi">Masoud Ghermezi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Studying the sheet metals is one of the most important research areas in the field of metal forming due to their extensive applications in the aerospace industries. A useful method for determining the forming limit of these materials and consequently preventing the rupture of sheet metals during the forming process is the use of the forming limit curve (FLC). In addition to specifying the forming limit, this curve also delineates a boundary for the allowed values of strain in sheet metal forming; these characteristics of the FLC along with its accuracy of computation and wide range of applications have made this curve the basis of research in the present paper. This study presents a new model that not only agrees with the results obtained from the above mentioned theory, but also eliminates its shortcomings. In this theory, like in the M-K theory, a thin sheet with an inhomogeneity as a gradient thickness reduction with a sinusoidal function has been chosen and subjected to two-dimensional stress. Through analytical evaluation, ultimately, a governing differential equation has been obtained. The numerical solution of this equation for the range of positive strains (stretched region) yields the results that agree with the results obtained from M-K theory. Also the solution of this equation for the range of negative strains (tension region) completes the FLC curve. The findings obtained by applying this equation on two alloys with the hardening exponents of 0.4 and 0.24 indicate the validity of the presented equation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=sheet%20metal" title="sheet metal">sheet metal</a>, <a href="https://publications.waset.org/abstracts/search?q=metal%20forming" title=" metal forming"> metal forming</a>, <a href="https://publications.waset.org/abstracts/search?q=forming%20limit%20curve%20%28FLC%29" title=" forming limit curve (FLC)"> forming limit curve (FLC)</a>, <a href="https://publications.waset.org/abstracts/search?q=M-K%20theory" title=" M-K theory"> M-K theory</a> </p> <a href="https://publications.waset.org/abstracts/33928/a-mathematical-based-prediction-of-the-forming-limit-of-thin-walled-sheet-metals" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33928.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">364</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">495</span> Music Note Detection and Dictionary Generation from Music Sheet Using Image Processing Techniques</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Ammar">Muhammad Ammar</a>, <a href="https://publications.waset.org/abstracts/search?q=Talha%20Ali"> Talha Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdul%20Basit"> Abdul Basit</a>, <a href="https://publications.waset.org/abstracts/search?q=Bakhtawar%20Rajput"> Bakhtawar Rajput</a>, <a href="https://publications.waset.org/abstracts/search?q=Zobia%20Sohail"> Zobia Sohail</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Music note detection is an area of study for the past few years and has its own influence in music file generation from sheet music. We proposed a method to detect music notes on sheet music using basic thresholding and blob detection. Subsequently, we created a notes dictionary using a semi-supervised learning approach. After notes detection, for each test image, the new symbols are added to the dictionary. This makes the notes detection semi-automatic. The experiments are done on images from a dataset and also on the captured images. The developed approach showed almost 100% accuracy on the dataset images, whereas varying results have been seen on captured images. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=music%20note" title="music note">music note</a>, <a href="https://publications.waset.org/abstracts/search?q=sheet%20music" title=" sheet music"> sheet music</a>, <a href="https://publications.waset.org/abstracts/search?q=optical%20music%20recognition" title=" optical music recognition"> optical music recognition</a>, <a href="https://publications.waset.org/abstracts/search?q=blob%20detection" title=" blob detection"> blob detection</a>, <a href="https://publications.waset.org/abstracts/search?q=thresholding" title=" thresholding"> thresholding</a>, <a href="https://publications.waset.org/abstracts/search?q=dictionary%20generation" title=" dictionary generation"> dictionary generation</a> </p> <a href="https://publications.waset.org/abstracts/133670/music-note-detection-and-dictionary-generation-from-music-sheet-using-image-processing-techniques" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/133670.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">181</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">494</span> A Detailed Experimental Study and Evaluation of Springback under Stretch Bending Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Soualem">A. Soualem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The design of multi stage deep drawing processes requires the evaluation of many process parameters such as the intermediate die geometry, the blank shape, the sheet thickness, the blank holder force, friction, lubrication etc..These process parameters have to be determined for the optimum forming conditions before the process design. In general sheet metal forming may involve stretching drawing or various combinations of these basic modes of deformation. It is important to determine the influence of the process variables in the design of sheet metal working process. Especially, the punch and die corner for deep drawing will affect the formability. At the same time the prediction of sheet metals springback after deep drawing is an important issue to solve for the control of manufacturing processes. Nowadays, the importance of this problem increases because of the use of steel sheeting with high stress and also aluminum alloys. The aim of this paper is to give a better understanding of the springback and its effect in various sheet metals forming process such as expansion and restraint deep drawing in the cup drawing process, by varying radius die, lubricant for two commercially available materials e.g. galvanized steel and Aluminum sheet. To achieve these goals experiments were carried out and compared with other results. The original of our purpose consist on tests which are ensured by adapting a U-type stretching-bending device on a tensile testing machine, where we studied and quantified the variation of the springback. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=springback" title="springback">springback</a>, <a href="https://publications.waset.org/abstracts/search?q=deep%20drawing" title=" deep drawing"> deep drawing</a>, <a href="https://publications.waset.org/abstracts/search?q=expansion" title=" expansion"> expansion</a>, <a href="https://publications.waset.org/abstracts/search?q=restricted%20deep%20drawing" title=" restricted deep drawing"> restricted deep drawing</a> </p> <a href="https://publications.waset.org/abstracts/6509/a-detailed-experimental-study-and-evaluation-of-springback-under-stretch-bending-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6509.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">454</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">493</span> Model Solutions for Performance-Based Seismic Analysis of an Anchored Sheet Pile Quay Wall</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=C.%20J.%20W.%20Habets">C. J. W. Habets</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20J.%20Peters"> D. J. Peters</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20G.%20de%20Gijt"> J. G. de Gijt</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20V.%20Metrikine"> A. V. Metrikine</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20N.%20Jonkman"> S. N. Jonkman</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Conventional seismic designs of quay walls in ports are mostly based on pseudo-static analysis. A more advanced alternative is the Performance-Based Design (PBD) method, which evaluates permanent deformations and amounts of (repairable) damage under seismic loading. The aim of this study is to investigate the suitability of this method for anchored sheet pile quay walls that were not purposely designed for seismic loads. A research methodology is developed in which pseudo-static, permanent-displacement and finite element analysis are employed, calibrated with an experimental reference case that considers a typical anchored sheet pile wall. A reduction factor that accounts for deformation behaviour is determined for pseudo-static analysis. A model to apply traditional permanent displacement analysis on anchored sheet pile walls is proposed. Dynamic analysis is successfully carried out. From the research it is concluded that PBD evaluation can effectively be used for seismic analysis and design of this type of structure. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anchored%20sheet%20pile%20quay%20wall" title="anchored sheet pile quay wall">anchored sheet pile quay wall</a>, <a href="https://publications.waset.org/abstracts/search?q=simplified%20dynamic%20analysis" title=" simplified dynamic analysis"> simplified dynamic analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=performance-based%20design" title=" performance-based design"> performance-based design</a>, <a href="https://publications.waset.org/abstracts/search?q=pseudo-static%20analysis" title=" pseudo-static analysis"> pseudo-static analysis</a> </p> <a href="https://publications.waset.org/abstracts/42173/model-solutions-for-performance-based-seismic-analysis-of-an-anchored-sheet-pile-quay-wall" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42173.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">492</span> Multi-Scale Damage and Mechanical Behavior of Sheet Molding Compound Composites Subjected to Fatigue, Dynamic, and Post-Fatigue Dynamic Loadings</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Shirinbayan">M. Shirinbayan</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Fitoussi"> J. Fitoussi</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Abbasnezhad"> N. Abbasnezhad</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Lucas"> A. Lucas</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Tcharkhtchi"> A. Tcharkhtchi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Sheet Molding Compounds (SMCs) with special microstructures are very attractive to use in automobile structures especially when they are accidentally subjected to collision type accidents because of their high energy absorption capacity. These are materials designated as standard SMC, Advanced Sheet Molding Compounds (A-SMC), Low-Density SMC (LD-SMC) and etc. In this study, testing methods have been performed to compare the mechanical responses and damage phenomena of SMC, LD-SMC, and A-SMC under quasi-static and high strain rate tensile tests. The paper also aims at investigating the effect of an initial pre-damage induced by fatigue on the tensile dynamic behavior of A-SMC. In the case of SMCs and A-SMCs, whatever the fibers orientation and applied strain rate are, the first observed phenomenon of damage corresponds to decohesion of the fiber-matrix interface which is followed by coalescence and multiplication of these micro-cracks and their propagations. For LD-SMCs, damage mechanisms depend on the presence of Hollow Glass Microspheres (HGM) and fibers orientation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=SMC" title="SMC">SMC</a>, <a href="https://publications.waset.org/abstracts/search?q=Sheet%20Molding%20Compound" title=" Sheet Molding Compound"> Sheet Molding Compound</a>, <a href="https://publications.waset.org/abstracts/search?q=LD-SMC" title=" LD-SMC"> LD-SMC</a>, <a href="https://publications.waset.org/abstracts/search?q=Low-Density%20SMC" title=" Low-Density SMC"> Low-Density SMC</a>, <a href="https://publications.waset.org/abstracts/search?q=A-SMC" title=" A-SMC"> A-SMC</a>, <a href="https://publications.waset.org/abstracts/search?q=Advanced%20Sheet%20Molding%20Compounds" title=" Advanced Sheet Molding Compounds"> Advanced Sheet Molding Compounds</a>, <a href="https://publications.waset.org/abstracts/search?q=HGM" title=" HGM"> HGM</a>, <a href="https://publications.waset.org/abstracts/search?q=Hollow%20Glass%20Microspheres" title=" Hollow Glass Microspheres"> Hollow Glass Microspheres</a>, <a href="https://publications.waset.org/abstracts/search?q=damage" title=" damage"> damage</a> </p> <a href="https://publications.waset.org/abstracts/100208/multi-scale-damage-and-mechanical-behavior-of-sheet-molding-compound-composites-subjected-to-fatigue-dynamic-and-post-fatigue-dynamic-loadings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/100208.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">211</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">491</span> The Effect on Rolling Mill of Waviness in Hot Rolled Steel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sunthorn%20Sittisakuljaroen">Sunthorn Sittisakuljaroen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The edge waviness in hot rolled steel is a common defect. Variables that effect for such defect include as raw material and machine. These variables are necessary to consider. This research studied the defect of edge waviness for SS 400 of metal sheet manufacture. Defect of metal sheets divided into two groups. The specimens were investigated on chemical composition and mechanical properties to find the difference. The results of investigate showed that not different to a standard significantly. Therefore the roll milled machine for sample need to adjustable rollers for press on metal sheet which was more appropriate to adjustable at both ends. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=edge%20waviness" title="edge waviness">edge waviness</a>, <a href="https://publications.waset.org/abstracts/search?q=hot%20rolling%20steel" title=" hot rolling steel"> hot rolling steel</a>, <a href="https://publications.waset.org/abstracts/search?q=metal%20sheet%20defect" title=" metal sheet defect"> metal sheet defect</a>, <a href="https://publications.waset.org/abstracts/search?q=SS%20400" title=" SS 400"> SS 400</a>, <a href="https://publications.waset.org/abstracts/search?q=roll%20leveller" title=" roll leveller "> roll leveller </a> </p> <a href="https://publications.waset.org/abstracts/11857/the-effect-on-rolling-mill-of-waviness-in-hot-rolled-steel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11857.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">420</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">490</span> Unsteady Stagnation-Point Flow towards a Shrinking Sheet with Radiation Effect </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=F.%20M.%20Ali">F. M. Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Nazar"> R. Nazar</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20M.%20Arifin"> N. M. Arifin</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Pop"> I. Pop</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the problem of unsteady stagnation-point flow and heat transfer induced by a shrinking sheet in the presence of radiation effect is studied. The transformed boundary layer equations are solved numerically by the shooting method. The influence of radiation, unsteadiness and shrinking parameters, and the Prandtl number on the reduced skin friction coefficient and the heat transfer coefficient, as well as the velocity and temperature profiles are presented and discussed in detail. It is found that dual solutions exist and the temperature distribution becomes less significant with radiation parameter. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer" title="heat transfer">heat transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=radiation%20effect" title=" radiation effect"> radiation effect</a>, <a href="https://publications.waset.org/abstracts/search?q=shrinking%20sheet%20unsteady%20flow" title=" shrinking sheet unsteady flow"> shrinking sheet unsteady flow</a> </p> <a href="https://publications.waset.org/abstracts/8265/unsteady-stagnation-point-flow-towards-a-shrinking-sheet-with-radiation-effect" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8265.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">385</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">489</span> Thermal Radiation and Chemical Reaction Effects on MHD Casson Fluid Past a Permeable Stretching Sheet in a Porous Medium</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Y.%20Sunita%20Rani">Y. Sunita Rani</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20Hari%20Krishna"> Y. Hari Krishna</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20V.%20Ramana%20Murthy"> M. V. Ramana Murthy</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Sudhaker%20Reddy"> K. Sudhaker Reddy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This article studied effects of radiation and chemical reaction on MHD casson fluoid flow past a Permeable Stretching Sheet in a Porous Medium. Suitable transformations are considered to transform the governing partial differential equations as ordinary ones and then solved by the numerical procedures like Runge- Kutta – Fehlberg shooting technique method. The effects of various governing parameters, on the velocity, temperature and concentration are displayed through graphs and discussed numerically. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=MHD" title="MHD">MHD</a>, <a href="https://publications.waset.org/abstracts/search?q=Casson%20fluid" title=" Casson fluid"> Casson fluid</a>, <a href="https://publications.waset.org/abstracts/search?q=porous%20medium" title=" porous medium"> porous medium</a>, <a href="https://publications.waset.org/abstracts/search?q=permeable%20stretching%20sheet" title=" permeable stretching sheet"> permeable stretching sheet</a> </p> <a href="https://publications.waset.org/abstracts/162105/thermal-radiation-and-chemical-reaction-effects-on-mhd-casson-fluid-past-a-permeable-stretching-sheet-in-a-porous-medium" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/162105.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">126</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">488</span> MHD Stagnation Point Flow towards a Shrinking Sheet with Suction in an Upper-Convected Maxwell (UCM) Fluid</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=K.%20Jafar">K. Jafar</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Nazar"> R. Nazar</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Ishak"> A. Ishak</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Pop"> I. Pop</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present analysis considers the steady stagnation point flow and heat transfer towards a permeable sheet in an upper-convected Maxwell (UCM) electrically conducting fluid, with a constant magnetic field applied in the transverse direction to flow, and a local heat generation within the boundary layer with a heat generation rate proportional to (T-T_inf)^p. Using a similarity transformation, the governing system of partial differential equations is first transformed into a system of ordinary differential equations, which is then solved numerically using a finite-difference scheme known as the Keller-box method. Numerical results are obtained for the flow and thermal fields for various values of the shrinking/stretching parameter lambda, the magnetic parameter M, the elastic parameter K, the Prandtl number Pr, the suction parameter s, the heat generation parameter Q, and the exponent p. The results indicate the existence of dual solutions for the shrinking sheet up to a critical value lambda_c whose value depends on the value of M, K, and s. In the presence of internal heat absorbtion (Q<0), the surface heat transfer rate decreases with increasing p but increases with parameter Q and s, when the sheet is either stretched or shrunk. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=magnetohydrodynamic%20%28MHD%29" title="magnetohydrodynamic (MHD)">magnetohydrodynamic (MHD)</a>, <a href="https://publications.waset.org/abstracts/search?q=boundary%20layer%20flow" title=" boundary layer flow"> boundary layer flow</a>, <a href="https://publications.waset.org/abstracts/search?q=UCM%20fluid" title=" UCM fluid"> UCM fluid</a>, <a href="https://publications.waset.org/abstracts/search?q=stagnation%20point" title=" stagnation point"> stagnation point</a>, <a href="https://publications.waset.org/abstracts/search?q=shrinking%20sheet" title=" shrinking sheet"> shrinking sheet</a> </p> <a href="https://publications.waset.org/abstracts/8588/mhd-stagnation-point-flow-towards-a-shrinking-sheet-with-suction-in-an-upper-convected-maxwell-ucm-fluid" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8588.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">354</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">487</span> Experimental Verification of Different Types of Shear Connectors on Composite Slab</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Siva">A. Siva</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Senthil"> R. Senthil</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Banupriya"> R. Banupriya</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Saravanakumar"> R. Saravanakumar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cold-formed steel sheets are widely used as primary tension reinforcement in composite slabs. It also performs as formwork for concreting and better ceiling surface. The major type of failure occurring in composite slab is shear failure. When the composite slab is flexurally loaded, the longitudinal shear is generated and transferred to the steel sheet concrete interface. When the load increases, the interface slip occurs. The slip failure can be resisted by mechanical interface interlock by shear studs. In this paper, the slip failure has been resisted by shear connectors and geometry of the steel sheet alone. The geometry of the sheet is kept constant for all the specimens and the type of shear connectors has been varied. Totally, three types of shear connectors (viz., straight headed, U and J) are bolted to the trapezoidal profile sheet and the concrete is casted over it. After curing, the composite slab is subjected to flexure load and the test results are compared with the numerical results analysed by ABAQUS software. The test result shows that the U-shaped bolted stud has higher flexure strength than the other two types of shear connectors. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cold%20formed%20steel%20sheet" title="cold formed steel sheet">cold formed steel sheet</a>, <a href="https://publications.waset.org/abstracts/search?q=headed%20studs" title=" headed studs"> headed studs</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20interlock" title=" mechanical interlock"> mechanical interlock</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20connectors" title=" shear connectors"> shear connectors</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20failure" title=" shear failure"> shear failure</a>, <a href="https://publications.waset.org/abstracts/search?q=slip%20failure" title=" slip failure "> slip failure </a> </p> <a href="https://publications.waset.org/abstracts/24077/experimental-verification-of-different-types-of-shear-connectors-on-composite-slab" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24077.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">555</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">486</span> Magnetohydrodynamic Flow over an Exponentially Stretching Sheet</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Raj%20Nandkeolyar">Raj Nandkeolyar</a>, <a href="https://publications.waset.org/abstracts/search?q=Precious%20Sibanda"> Precious Sibanda</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The flow of a viscous, incompressible, and electrically conducting fluid under the influence of aligned magnetic field acting along the direction of fluid flow over an exponentially stretching sheet is investigated numerically. The nonlinear partial differential equations governing the flow model is transformed to a set of nonlinear ordinary differential equations using suitable similarity transformation and the solution is obtained using a local linearization method followed by the Chebyshev spectral collocation method. The effects of various parameters affecting the flow and heat transfer as well as the induced magnetic field are discussed using suitable graphs and tables. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aligned%20magnetic%20field" title="aligned magnetic field">aligned magnetic field</a>, <a href="https://publications.waset.org/abstracts/search?q=exponentially%20stretching%20sheet" title=" exponentially stretching sheet"> exponentially stretching sheet</a>, <a href="https://publications.waset.org/abstracts/search?q=induced%20magnetic%20field" title=" induced magnetic field"> induced magnetic field</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetohydrodynamic%20flow" title=" magnetohydrodynamic flow"> magnetohydrodynamic flow</a> </p> <a href="https://publications.waset.org/abstracts/10795/magnetohydrodynamic-flow-over-an-exponentially-stretching-sheet" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10795.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">453</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">485</span> Simulation of Kinetic Friction in L-Bending of Sheet Metals</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maziar%20Ramezani">Maziar Ramezani</a>, <a href="https://publications.waset.org/abstracts/search?q=Thomas%20Neitzert"> Thomas Neitzert</a>, <a href="https://publications.waset.org/abstracts/search?q=Timotius%20Pasang"> Timotius Pasang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper aims at experimental and numerical investigation of springback behavior of sheet metals during L-bending process with emphasis on Stribeck-type friction modeling. The coefficient of friction in Stribeck curve depends on sliding velocity and contact pressure. The springback behavior of mild steel and aluminum alloy 6022-T4 sheets was studied experimentally and using numerical simulations with ABAQUS software with two types of friction model: Coulomb friction and Stribeck friction. The influence of forming speed on springback behavior was studied experimentally and numerically. The results showed that Stribeck-type friction model has better results in predicting springback in sheet metal forming. The FE prediction error for mild steel and 6022-T4 AA is 23.8%, 25.5% respectively, using Coulomb friction model and 11%, 13% respectively, using Stribeck friction model. These results show that Stribeck model is suitable for simulation of sheet metal forming especially at higher forming speed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=friction" title="friction">friction</a>, <a href="https://publications.waset.org/abstracts/search?q=L-bending" title=" L-bending"> L-bending</a>, <a href="https://publications.waset.org/abstracts/search?q=springback" title=" springback"> springback</a>, <a href="https://publications.waset.org/abstracts/search?q=Stribeck%20curves" title=" Stribeck curves"> Stribeck curves</a> </p> <a href="https://publications.waset.org/abstracts/7441/simulation-of-kinetic-friction-in-l-bending-of-sheet-metals" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7441.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">491</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">484</span> Strong Antiferromagnetic Super Exchange in AgF2 </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wojciech%20Grochala">Wojciech Grochala</a> </p> <p class="card-text"><strong>Abstract:</strong></p> AgF2 is an important two-dimensional antiferromagnet and an analogue of [CuO2]2– sheet. However, the strength of magnetic superexchange as well as magnetic dimensionality have not been explored before . Here we report our recent Raman and neutron scattering experiments which led to better understanding of the magnetic properties of the title compound. It turns out that intra-sheet magnetic superexchange constant reaches 70 meV, thus some 2/3 of the value measured for parent compounds of oxocuprate superconductors which is over 100 meV. The ratio of intra-to-inter-sheet superexchange constants is of the order of 102 rendering AgF2 a quasi-2D material, similar to the said oxocuprates. The quantum mechanical calculations reproduce the abovementioned values quite well and they point out to substantial covalence of the Ag–F bonding. After 3 decades of intense research on layered oxocuprates, AgF2 now stands as a second-to-none analogue of these fascinating systems. It remains to be seen whether this 012 parent compound may be doped in order to achieve superconductivity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antiferromagnets" title="antiferromagnets">antiferromagnets</a>, <a href="https://publications.waset.org/abstracts/search?q=superexchange" title=" superexchange"> superexchange</a>, <a href="https://publications.waset.org/abstracts/search?q=silver" title=" silver"> silver</a>, <a href="https://publications.waset.org/abstracts/search?q=fluorine" title=" fluorine"> fluorine</a> </p> <a href="https://publications.waset.org/abstracts/105353/strong-antiferromagnetic-super-exchange-in-agf2" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/105353.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">483</span> Numerical Determination of Transition of Cup Height between Hydroforming Processes </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Selcuk%20Halkac%C4%B1">H. Selcuk Halkacı</a>, <a href="https://publications.waset.org/abstracts/search?q=Mevl%C3%BCt%20T%C3%BCrk%C3%B6z"> Mevlüt Türköz</a>, <a href="https://publications.waset.org/abstracts/search?q=Ekrem%20%C3%96zt%C3%BCrk"> Ekrem Öztürk</a>, <a href="https://publications.waset.org/abstracts/search?q=Murat%20Dilmec"> Murat Dilmec</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Various attempts concerning the low formability issue for lightweight materials like aluminium and magnesium alloys are being investigated in many studies. Advanced forming processes such as hydroforming is one of these attempts. In last decades sheet hydroforming process has an increasing interest, particularly in the automotive and aerospace industries. This process has many advantages such as enhanced formability, the capability to form complex parts, higher dimensional accuracy and surface quality, reduction of tool costs and reduced die wear compared to the conventional sheet metal forming processes. There are two types of sheet hydroforming. One of them is hydromechanical deep drawing (HDD) that is a special drawing process in which pressurized ﬂuid medium is used instead of one of the die half compared to the conventional deep drawing (CDD) process. Another one is sheet hydroforming with die (SHF-D) in which blank is formed with the act of fluid pressure and it takes the shape of die half. In this study, transition of cup height according to cup diameter between the processes was determined by performing simulation of the processes in Finite Element Analysis. Firstly SHF-D process was simulated for 40 mm cup diameter at different cup heights chancing from 10 mm to 30 mm and the cup height to diameter ratio value in which it is not possible to obtain a successful forming was determined. Then the same ratio was checked for a different cup diameter of 60 mm. Then thickness distributions of the cups formed by SHF-D and HDD processes were compared for the cup heights. Consequently, it was found that the thickness distribution in HDD process in the analyses was more uniform. <p class="card-text"><strong>Keywords:</strong> <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=HDD" title=" HDD"> HDD</a>, <a href="https://publications.waset.org/abstracts/search?q=hydroforming%20sheet%20metal%20forming" title=" hydroforming sheet metal forming"> hydroforming sheet metal forming</a>, <a href="https://publications.waset.org/abstracts/search?q=SHF-D" title=" SHF-D"> SHF-D</a> </p> <a href="https://publications.waset.org/abstracts/37056/numerical-determination-of-transition-of-cup-height-between-hydroforming-processes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/37056.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">429</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">482</span> Effect of Punch Diameter on Optimal Loading Profiles in Hydromechanical Deep Drawing Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mehmet%20Halkaci">Mehmet Halkaci</a>, <a href="https://publications.waset.org/abstracts/search?q=Ekrem%20%C3%96zt%C3%BCrk"> Ekrem Öztürk</a>, <a href="https://publications.waset.org/abstracts/search?q=Mevl%C3%BCt%20T%C3%BCrk%C3%B6z"> Mevlüt Türköz</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Sel%C3%A7uk%20Halkac%C4%B1"> H. Selçuk Halkacı</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydromechanical deep drawing (HMD) process is an advanced manufacturing process used to form deep parts with only one forming step. In this process, sheet metal blank can be drawn deeper by means of fluid pressure acting on sheet surface in the opposite direction of punch movement. High limiting drawing ratio, good surface quality, less springback characteristic and high dimensional accuracy are some of the advantages of this process. The performance of the HMD process is affected by various process parameters such as fluid pressure, blank holder force, punch-die radius, pre-bulging pressure and height, punch diameter, friction between sheet-die and sheet-punch. The fluid pressure and bank older force are the main loading parameters and affect the formability of HMD process significantly. The punch diameter also influences the limiting drawing ratio (the ratio of initial sheet diameter to punch diameter) of the sheet metal blank. In this research, optimal loading (fluid pressure and blank holder force) profiles were determined for AA 5754-O sheet material through fuzzy control algorithm developed in previous study using LS-DYNA finite element analysis (FEA) software. In the preceding study, the fuzzy control algorithm was developed utilizing geometrical criteria such as thinning and wrinkling. In order to obtain the final desired part with the developed algorithm in terms of the punch diameter requested, the effect of punch diameter, which is the one of the process parameters, on loading profiles was investigated separately using blank thickness of 1 mm. Thus, the practicality of the previously developed fuzzy control algorithm with different punch diameters was clarified. Also, thickness distributions of the sheet metal blank along a curvilinear distance were compared for the FEA in which different punch diameters were used. Consequently, it was found that the use of different punch diameters did not affect the optimal loading profiles too much. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Finite%20Element%20Analysis%20%28FEA%29" title="Finite Element Analysis (FEA)">Finite Element Analysis (FEA)</a>, <a href="https://publications.waset.org/abstracts/search?q=fuzzy%20control" title=" fuzzy control"> fuzzy control</a>, <a href="https://publications.waset.org/abstracts/search?q=hydromechanical%20deep%20drawing" title=" hydromechanical deep drawing"> hydromechanical deep drawing</a>, <a href="https://publications.waset.org/abstracts/search?q=optimal%20loading%20profiles" title=" optimal loading profiles"> optimal loading profiles</a>, <a href="https://publications.waset.org/abstracts/search?q=punch%20diameter" title=" punch diameter"> punch diameter</a> </p> <a href="https://publications.waset.org/abstracts/37109/effect-of-punch-diameter-on-optimal-loading-profiles-in-hydromechanical-deep-drawing-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/37109.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">431</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">481</span> Effect of Magnetic Field on Mixed Convection Boundary Layer Flow over an Exponentially Shrinking Vertical Sheet with Suction</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20S.%20P.%20M.%20Isa">S. S. P. M. Isa</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20M.%20Arifin"> N. M. Arifin</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Nazar"> R. Nazar</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Bachok"> N. Bachok</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20M.%20Ali"> F. M. Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Pop"> I. Pop</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A theoretical study has been presented to describe the boundary layer flow and heat transfer on an exponentially shrinking sheet with a variable wall temperature and suction, in the presence of magnetic field. The governing nonlinear partial differential equations are converted into ordinary differential equations by similarity transformation, which are then solved numerically using the shooting method. Results for the skin friction coefficient, local Nusselt number, velocity profiles as well as temperature profiles are presented through graphs and tables for several sets of values of the parameters. The effects of the governing parameters on the flow and heat transfer characteristics are thoroughly examined. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=exponentially%20shrinking%20sheet" title="exponentially shrinking sheet">exponentially shrinking sheet</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20field" title=" magnetic field"> magnetic field</a>, <a href="https://publications.waset.org/abstracts/search?q=mixed%20convection" title=" mixed convection"> mixed convection</a>, <a href="https://publications.waset.org/abstracts/search?q=suction" title=" suction"> suction</a> </p> <a href="https://publications.waset.org/abstracts/13072/effect-of-magnetic-field-on-mixed-convection-boundary-layer-flow-over-an-exponentially-shrinking-vertical-sheet-with-suction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13072.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">330</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">480</span> Evaluation of Uniformity for Gafchromic Sheets for Film Dosimetry</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fayzan%20Ahmed">Fayzan Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=Saad%20Bin%20Saeed"> Saad Bin Saeed</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdul%20Qadir%20Jangda"> Abdul Qadir Jangda</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Gafchromic™ sheet are extensively used for the QA of intensity modulated radiation therapy and other in-vivo dosimetry. Intra-sheet Non-uniformity of scanner as well as film causes undesirable fluctuations which are reflected in dosimetry The aim of this study is to define a systematic and robust method to investigate the intra-sheet uniformity of the unexposed Gafchromic Sheets and the region of interest (ROI) of the scanner. Sheets of lot No#: A05151201 were scanned before and after the expiry period with the EPSON™ XL10000 scanner in the transmission mode, landscape orientation and 72 dpi resolution. ROI of (8’x 10’ inches) equal to the sheet dimension in the center of the scanner is used to acquire images with full transmission, block transmission and with sheets in place. 500 virtual grids, created in MATALB® are imported as a macros in ImageJ (1.49m Wayne Rasband) to analyze the images. In order to remove the edge effects, the outer 86 grids are excluded from the analysis. The standard deviation of the block transmission and full transmission are 0.38% and 0.66% confirming a higher uniformity of the scanner. Expired and non-expired sheets have standard deviations of 2.18% and 1.29%, show that uniformity decreases after expiry. The results are promising and indicates a good potential of this method to be used as a uniformity check for scanner and unexposed Gafchromic sheets. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=IMRT" title="IMRT">IMRT</a>, <a href="https://publications.waset.org/abstracts/search?q=film%20dosimetry" title=" film dosimetry"> film dosimetry</a>, <a href="https://publications.waset.org/abstracts/search?q=virtual%20grids" title=" virtual grids"> virtual grids</a>, <a href="https://publications.waset.org/abstracts/search?q=uniformity" title=" uniformity"> uniformity</a> </p> <a href="https://publications.waset.org/abstracts/24242/evaluation-of-uniformity-for-gafchromic-sheets-for-film-dosimetry" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24242.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 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