A comparative study of the hypoplasticity and the fabric‐dependent dilatant double shearing models for granular materials |
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| Authors: | Huaning Zhu Morteza M Mehrabadi Mehrdad Massoudi |
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| Institution: | 1. Department of Mechanical Engineering, Tulane University, New Orleans, LA 70118, U.S.A.;2. Department of Mechanical Engineering, Tulane University, New Orleans, LA 70118, U.S.A.Department of Mechanical Engineering, Tulane University, New Orleans, LA 70118, U.S.A.;3. U.S. Department of Energy, National Energy Technology Laboratory, P.O. Box 10940, Pittsburgh, PA 15236, U.S.A. |
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| Abstract: | In this paper, we consider the mechanical response of granular materials and compare the predictions of a hypoplastic model with that of a recently developed dilatant double shearing model which includes the effects of fabric. We implement the constitutive relations of the dilatant double shearing model and the hypoplastic model in the finite element program ABACUS/Explicit and compare their predictions in the triaxial compression and cyclic shear loading tests. Although the origins and the constitutive relations of the double shearing model and the hypoplastic model are quite different, we find that both models are capable of capturing typical behaviours of granular materials. This is significant because while hypoplasticity is phenomenological in nature, the double shearing model is based on a kinematic hypothesis and microstructural considerations, and can easily be calibrated through standard tests. Copyright © 2006 John Wiley & Sons, Ltd. |
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| Keywords: | granular materials dilatant double shearing model hypoplasticity fabric cyclic shear loading |
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