毛安雄^*

（  南昌大学建筑工程学院；  ）

摘要： 在岩土材料的本构关系的研究中，奇异全屈服面的情况非常多见，如土的双屈服面模型、混凝土的四参数模型。然而一般的弹塑性本构理论适用于正则屈服面，对于奇异屈服面的情况论述较少。本文讨论了Lagrange型有限变形弹塑性本构理论的屈服函数、加卸载准则、本构方程等，最终将Lagrange型有限变形弹塑性本构理论应用在小变形情况下的奇异屈服面弹塑性模型,得出了完整的奇异屈服面的本构理论。本文的工作使得Lagrange型有限变形弹塑性本构理论更为完整，并对岩土本构的理论研究有一定的意义。
关键词： 有限变形；背应力；小变形；奇异屈服面

mao anxiong^*

（  College of Architecture Engineering,Nanchang university,；  ）

Abstract： The situation of singular yield suface are very common in the research of constitutive relation of geo-materials, for example, two-yeild-surface soil model ,the four-parameter concrete model..But the theory of elastic-plastics constitute is generally suitable for regular yield surface.and is not suitable for singular yield suface . This paper discusses the yield function、loading unloading criterion、constitutive equation of Lagrangian finite plasticity theory.Finally lagrangian finite plasticity theory is used in constitutive models of elastic –plasticity at infinitesimal strain ,and complete Constitutive relation for singular yield suface theory is obtained. This paper are integrated into the lagrangian theory of elastic-plastics constitute ,and the research of constitutive relation of geo-materials is more significant.

Tag：

点此返回栏目查看更多>>>参考论文