{"title":"A Constitutive Model for Time-Dependent Behavior of Clay","authors":"T. N. Mac, B. Shahbodaghkhan, N. Khalili","volume":90,"journal":"International Journal of Geological and Environmental Engineering","pagesStart":596,"pagesEnd":602,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/9998378","abstract":"<p>A new elastic-viscoplastic (EVP) constitutive model is proposed for the analysis of time-dependent behavior of clay. The proposed model is based on the bounding surface plasticity and the concept of viscoplastic consistency framework to establish continuous transition from plasticity to rate dependent viscoplasticity. Unlike the overstress based models, this model will meet the consistency condition in formulating the constitutive equation for EVP model. The procedure of deriving the constitutive relationship is also presented. Simulation results and comparisons with experimental data are then presented to demonstrate the performance of the model.<\/p>\r\n","references":"[1]\tK. Arulanandan, C. K. Shen, and R. B. Young, \"Undrained creep behaviour of a coastal organic silty clay\". Geotechnique. Vol. 21, no. 4, p. 359-375, 1971.\r\n[2]\tS. Leroueil, M. Kabbaj, F. Tavenas, and R. Bouchard, \"Stress-strain-strain rate relation for the compressibility of sensitive natural clays\". Geotechnique. Vol. 35, no. 2, p. 159-180, 1985.\r\n[3]\tA. Augustesen, M. Liingaard, and P. V. Lade, \"Evaluation of time-dependent behavior of soils\". International Journal of Geomechanics. Vol. 4, no. 3, p. 137-156, 2004.\r\n[4]\tM. Liingaard, A. Augustesen, and P. V. Lade, \"Characterization of models for time-dependent behavior of soils\". International Journal of Geomechanics. Vol. 4, no. 3, p. 157-177, 2004.\r\n[5]\tP. Perzyna, \"On the constitutive equations for work-hardening and rate sensitive plastic materials\". 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