A study on the influence of stress concentration in DFZ on the growth of model I crack

摘要：

A dislocation-free zone (DFZ) near the tip of model I crack can be formed after dislocation emission.There is a second stress peak in the DFZ near plastic zone (PZ) besides a stress peak at the crack tip.In the paper,using a super-dislocation mode,the complex functions of stress and displacement fields in front of crack were derived,and based on MATLAB simulating,the relation between stress concentration in DFZ and the angle of inclined plane,as well as how the stress concentration in the DFZ was affected by the applied stress factor and the friction stress,were studied.The results show that peak stress in DFZ will change with the applied stress factor increasing and the friction stress decreasing,but the position of nucleation where the most serious concentration happens do not change,and the direction of crack growth do not change at all.

关键词： DFZ Stress concentration Super-dislocation Model I crack Crack growth

作者: Hao Fu Jian Chen Yanjie Ren Jianjun He Qingmin Sun Min Hu

作者单位: School of Energy and Power Engineering,Changsha University of Science and Technology,Changsha 410114,China Key Laboratory of Efficient and Clean Energy Utilization,College of Hunan Province,Changsha 410114,China

会议类型: 国际会议

会议名称: 国际断裂力学2009年会

会议地点: 成都

会议语种:英文

页码: 189-193

在线出版日期: 2009-10-16（万方平台首次上网日期，不代表论文的发表时间）