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中文摘要：
基于粒状材料的颗粒破碎对材料剪胀特性的影响以及描述特征状态应力比的幂函数表达式，提出相应的屈服面和屈服面的表达式，并对屈服面随参数的变化规律进行分析。分析结果表明：通过选取适当的参数，屈服面能够完全回归到修正剑桥模型屈服面的形式。最后，结合适当的等向压缩条件和统一硬化参数，将屈服面应用到砂土的本构模型，能够很好地预测试验结果，合理描述砂土颗粒破碎的力学特性。
英文摘要：
Based on the particle crushing of granular material, which affects the mechanical characteristic of stress dilatancy, and the power function used to describe the characteristic stress ratio, it is developed that the yield surface and its expression of the characteristic state. It is also analyzed the change law of the yield surface according to the value of parameters. The yield surface of characteristic state will be the same as the modified Cam-clay model when the parameter equals to a special value. Finally, combined with proper isotropic compressed conditions and unified hardening parameter, the yield surface can be applied into the constitutive model for sand, which can predict the tests results well, and describe the mechanical characteristic of sand exhibiting particle crushing reasonably.
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