由试验数据拟合重庆红粘土的屈服条件

依据广义塑性力学原理，介绍了屈服面的物理意义。直接从三轴试验和真三轴试验的试验数据拟合重庆红粘土的屈服条件，给出了重庆红粘土的3个屈服面（体积屈服面、q方向上的剪切屈服面以及θσ方向上的剪切屈服面）的数学表达式。结合数值算例，证明了提出的3个屈服面表达式的合理性。

Fitting the yield criterion of Chongqing red clay by experimental data

The physical sense and study method of the yield surface was discussed systematically.In this paper,the yield characters of Chongqing red clay was studied through conventional triaxial tests and true triaxial tests.Volume yield surface,shear yield surface in direction of Lode stress angle and shear yield surface in direction q of Chongqing red clay were developed on the basis of the generalized plasticity,and their rationality are shown in the computed example.