Finite Strain, Anisotropic Modified Cam Clay Model with Plastic Spin. I: Theory
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Volume 126, Issue 10
Abstract
There are several approaches that can take into account the micromechanical and anisotropic behavior of soils. One is Dafalias's plastic spin approach. It is a convenient approach that utilizes an internal variable called “the plastic spin tensor.” The plastic spin is a function of the embedded stress (back stress) that causes the induced anisotropy and, consequently, the isotropic soil models cannot account for it. This paper presents a formulation of the plastic spin and related constitutive equations based on Dafalias's “anisotropic modified Cam clay model” with an updated Lagrangian reference frame. The required parameters are the typical consolidation and stress-strain parameters. The only additional parameters used in this work are the back-stress parameters c and x. These features are relatively simple and easy to use compared to other models.
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Information & Authors
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Published In
Journal of Engineering Mechanics
Volume 126 • Issue 10 • October 2000
Pages: 1012 - 1019
History
Received: Aug 5, 1999
Published online: Oct 1, 2000
Published in print: Oct 2000
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