中文摘要：

基于热力学方法，为深入认识土体动力耗散特性及变形机理，从Hardin—Dmevich模型的骨架曲线和滞回曲线出发，采用热力学方法，引入背应力为塑性模量与塑性应变乘积的假定，构造土体动力增量耗散函数，该方法自动满足热力学定律．并讨论其对应的p—q应力空间中的屈服曲线的形式、变化规律以及材料参数对屈服曲线的影响．结果表明，其屈服曲线遵循直线形式，并且随着材料参数的增大，发生逆时针的旋转．

英文摘要：

Based on the thermodynamic method, dynamic dissipative properties and deformation mechanisms are studied in depth. Starting from the skeleton curve and hysteresis loop of Hardin - Drnevich model for soils, the dynamic incremental dissipation function is constructed by use of assumption of translation rule of the back stress, in which the shift stress is assumed to be the product by the plastic modulus and the internal variable. It is indicated that the constructed function automatically satisfies thermodynamical requirements. And effects of the form, the change law of yield curve in the correspondingp - q true stress space, and material parameters on the yield curve are discussed. The results show that the yield curves in the p - q true stress space appear as a straight line, and the anticlockwise rotation will occur with the increased material parameters