在应变软化阶段，泊松比不影响塑性体积应变。
However, Poisson ratio does not influence the plastic volumetric strain in the stage of strain softening.
积累损伤作为等效塑性应变、塑性体积应变和压力的函数。
The accumulated damage model is viewed as the function of equivalent plastic strain, plastic volumetric strain and pressure.
通过耦合应力的建立以及耦合应力与塑性体积应变一维化本构关系的推导，从全新的视角介绍了一种理解和建立土本构模型的方法。
From a new visual Angle, a method for understanding and establishing the soil constitutive model is introduced by deducing the coupling stress and one-dimensional constitutive relation.
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