基于连续细观力学的非均质岩土弹塑性多尺度模拟
Multiscale Modeling of Elasto-Plasticity in Heterogeneous Geomaterials Based on Continuum Micromechanics
摘要：
本文研究了非均质岩土材料弹塑性的一些细观力学问题。其目的是提高材料的代表性体积的弹塑性行为，由于涉及不可逆变形，这确实是一项非常具有挑战性的任务。考虑塑性应变作为本征应变，使我们能够采用连续微观力学提供的强大工具，这主要是为了放大本征应力弹性介质而开发的。这种基于特征应变的多尺度弹塑性公式的有效性在此通过与有限元（FE）模拟的预测进行比较来检验。
英文摘要：
In this paper, we investigate some micromechanical aspects of elasto-plasticity in heterogeneous geomaterials. The aim is to upscale the elasto-plastic behavior for a representative volume of the material which is indeed a very challenging task due to the irreversible deformations involved. Considering the plastic strains as eigen-strains allows us to employ the powerful tools offered by Continuum Micromechanics which are mainly developed for upscaling of eigen-stressed elastic media. The validity of such eigen-strain based formulation of multiscale elasto-plasticity is herein examined by comparing its predictions against Finite Element (FE) simulations.
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