Elasto-plastic constitutive modeling for granular materials^①

来源期刊：中南大学学报(英文版)2004年第4期

论文作者：彭芳乐 李建中

文章页码：440 - 444

Key words：sand; elasto-plastic model; hardening function; stress path

Abstract: Based on the modified plastic strain energy approach, an elasto-plastic constitutive modeling for sand was proposed. The hardening function between the modified plastic strain energy and a stress parameter was presented, which was independent of stress history and stress paths. The proposed model was related to an isotropically work-hardening and softening, non-associated and elasto-plastic material description. It is shown that the constitutive modeling, the inherent and stress system-induced cross-anisotropic elasticity is also considered. The constitutive model is capable of simulating the effects on the deformation characteristics of stress history and stress path, pressure level and anisotropic strength.