毛安雄^*

（  南昌大学建筑工程学院；  ）

摘要： 本文利用小变形的Lagrange型有限变形弹塑性本构理论，讨论了一种屈服面是奇异屈服面的弹塑性本构模型。并且推导出该模型的弹塑性有限元计算的所有计算公式。最后利用matlab软件编编制有限元程序计算一个算例，并用ansys工程软件计算进行比对验证。从数据结果的比对，得出了能所提出的这种特殊的各向同性弹塑性本构模型能够描述材料的应力响应。
关键词： 有限元；小变形；奇异屈服面

Mao Anxiong^*

（  College of Architecture Engineering,Nanchang university；  ）

Abstract： Use of Lagrangian finite plasticity theory at infinitesimal strain, This paper discussed the constitutive models of elastic-plasticity at infinitesimal strain for singular yield suface.and all calculating formula of elastic-plasticity is derived by finite element calculating. Finally, all the software about finite element is designed by matlab and an example is calculated.,proficiency testing of anasys.. The theoretical results can describe the specail constitutive models of isotropic elastic-plasticity and the stress response of material.

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