摘要
由连续介质损伤力学的基本理论出发,引入力电损伤变量并建立了一个热压电介质断裂的损伤本构模型.再由虚功原理导出了求解这类含损伤的关于热力电耦合问题的有限元方程.通过数值计算,分析了温度改变对裂纹尖端力电损伤的影响规律.
By introducing both the mechanical and electrical damage variables, a static damage constitutive model for thermopiezoelectric materials is proposed. The Finite Element formulation and its solution for the heat-electric-elastic coupling problem are then obtained by the virtual work principle. Finally, the damage fields near a crack-tip in a thermopiezoelectric plate under different thermal loads are calculated as illustration examples. The damage curves ahead of the crack tip are also given.
出处
《固体力学学报》
CAS
CSCD
北大核心
2005年第2期163-166,共4页
Chinese Journal of Solid Mechanics
基金
国家自然科学基金(10172036)资助.
关键词
热压电介质
力电损伤
温变效应
有限单元法
thermopiezoelectric materials, mechanical and electrical damages, temperature change, finite element method
