广义合成偏应力椭球模型

本文从应力椭球的概念出发，建立了反映岩土类材料屈服与破坏的广义合成偏应力椭球屈服准则，该准则不仅反映了偏斜应力和静水应力对材料的屈服与破坏的贡献，而且反映了岩土类材料的屈服与破坏与静水应力呈非线性的关系以及静压屈服的特性。将该模型应用于混凝土，其结果与公开发表的文献和实验数据取得了很好的一致性。

THE ELLIPSOIDAL MODEL OF GENERALIZED RESULTANT DEVIATORIC STRESS

In this paper based on the idea of stress ellipsoid, the author proposes an elliptical globe yielding criterions which describes the yielding of rock and soil. The yielding criterion not only accounts for the deviatoric stress state and the static hydraulic stress state contributing to yielding of material, but also demonstrates the nonlinear relation of the yielding and the static hydraulic stress. In addition, it shows the behavior of yielding of rock and soil under the static hydraulic pressure. The yielding criterion is used to describe destruction of rock and soil.The results are shown to agree well with test dates.