ABSTRACT
A reversed research approach has been used in this paper. Unlike the models proposed in the past researches in which the thermodynamic theorems are the tools to formulize constitutive model themselves as restricted conditions, the thermodynamic theorems in the newly proposed model are only used as the tool to verify the logicality of the model in the meaning of thermodynamics after the model is established. Therefore, in establishing the model, the flow rule, yielding function, plastic potential, evolution equation for subloading surface are chosen without considering the restrictions controlled by the thermodynamic theorems at the very beginning. It is therefore possible for us to choose reasonable formulations based on very simple physical meanings and practical equations in soil mechanics such as the e-lnp relation in consolidation tests, so that the establishment of a new model become much easier.
