【摘要】 在归纳整理连续介质的材料力学性质的基础上,引出土体本构关系的两种描述框架,即弹塑性理论和亚塑性理论,并对其相互关系进行了分析,指出亚塑性理论适宜用来构建土体的本构模型,并提出了一种基于亚塑性理论的建立土体各向异性本构模型的新途径,该途径通过将一各向异性破坏准则嵌入亚塑性模型来确定各向异性参数,有别于以往通过拟合实验数据来确定各向异性参数的方法。该途径为目前各种分析平台提供了一种考虑主应力轴旋转效应的可能。更多还原

【Abstract】 After generalizing and clarifying mechanics properties of continuous media, two description frameworks of a constitutive model for soil-elasto-plasticity theory and hypoplasticity theory-were put forward. And the interrelation between the two frameworks was analyzed. It is pointed out that the framework of hypoplasticity theory is suitable for establishing constitutive model of soil. And a new approach for establishing anisotropic constitutive model of soil based on hypoplasticity theory was proposed. In this way, anisotropic parameters were determined by embedding an anisotropic failure criterion in the hypoplasticity model. It is different from the usual way of parameters’ determination by fitting experimental data. This approach offered the possibility of considering the effects of the rotation of principal stress axes for existing analysis platforms.更多还原