四川大学学报：工程科学版2011，Vol.43Issue(6)：64-69,6.
基于FE/EFG耦合算法的虚拟裂纹闭合法
Virtual Crack Closure Technique Based on Coupled FE/EFG Method
摘要
Abstract
A virtual crack closure technique based on EFG method for thread-shape crack was introduced.The cracked component was discretized and the displacement field was determined using a coupled FE/EFG method,by which EFG nodes were arranged in the vicinity of crack tip and FE elements in the remain part in order to improve computational efficiency.Two typical parameters,nodal force and crack opening displacement attached to crack tip were calculated by means of setting up an auxiliary FE zone around crack tip.Strain energy release rate（SERR）,further stress intensity factor（SIF） were determined by the two parameters.The method to calculate SIF was named as virtual crack closure technique based on EFG method.Several numerical examples using the presented method showed that SIF on the crack tip can be obtained accurately.关键词
应变能释放率/虚拟裂纹闭合法/应力强度因子/EFG/数值求解Key words
strain energy release rate/virtual crack closure technique/stress intensity factor/EFG/numerical solution分类
信息技术与安全科学引用本文复制引用
王维说,常学平..基于FE/EFG耦合算法的虚拟裂纹闭合法[J].四川大学学报：工程科学版,2011,43(6):64-69,6.基金项目
四川省教育厅资助科研资助项目 （）
西南石油大学校级科技基金资助项目 （）
