固体发动机药柱损伤粘弹有限元分析

A Finite Element Analysis of Viscoelasticity for SRM Grain with Damages

基于损伤的粘弹性材料积分蠕变型本构关系 ,建立了求解应力应变和损伤变量的一种新型增量型有限元法 ,引用当量应力 ,可以分析三维损伤场 ,采用迭代法求解相互耦合的应力和损伤场。算例分析表明 ,所建立的方法对分析药柱损伤有效。

Based on the integral creep constitutive relations of viscoelastic material with damages, a new increment finite element method to solve stress, strain and damage variables is developed by using equivalent stresses, three-dimension damage field can be analyzed and coupling stress and damage field can be solved by using iteration method. The calculated results show that the method is effective and reliable in analyzing the grain damages.