一种考虑多种强化机制的黄土本构关系

A Constitutive Relationship for Malan Loess Considering Hardening Mechanisms

将黄土材料的含水量和变形历史引入到内时定义中,利用与热力学相一致的简单机械模型发展了黄土的偏应力应变本构关系。用所建立的本构方程分别描述了马兰黄土在不同围压和不同含水量条件下的应力应变响应特性,取得与现有实验相吻合的结果。所提出的考虑围压和含水量的黄土本构模型对黄土在各种复杂载荷作用下变形与破坏现象的研究具有一定参考价值。

By introduceing Endochoronic time scale with water content and deformation history for Malan loess, a constitutive relationship had been developed based on thermodynamics. By using of the constitutive relationship of Malan loess, the response properties of stress vs. strain with under different confining pressures and water contents were investigated. It seems that the present theory could satisfactorily describe existing experimental results. The constitutive equation for Malan loess considering hardening mechanisms proposed in this paper has been provided with reference value for studying of deformation and failure phenomena of Malan loess under different complex loading conditions.