土的应力短时型非线性本构模型

提出了一种新的、适用于正常固结土在静荷作用下的应力矢量型非线性本构模型、该模型不仅能够同时考虑应力的大小和方向变化对变形的作用效应，而且能够很好地描述土的非线笥、硬化性、剪胀剪缩性、非共轴性以及变形与应力路径的相关性等多种主要变形特性。

A Stress Vector-Based Non-Linear Constitutive Model for Soil

A new non linear constitutive model for normal consolidation soil under static loading condition is presented. It can not only take account of the influence of both numerical and directional changes of stress vector on deformation of soil simultaneously, but also describe well the main deformation behaviors of soil, such as stress strain nonlinearity, hardening property, dilatancy, stress path dependency and the non coaxiality between the principal stress and the principal strain increment directions.