摘要
根据焦散线法的基本原理,推出了该法测量线弹性断裂力学和弹塑性断裂力学参数J积分的计算公式,并列举了有机玻璃材料和幂硬化金属材料的J积分测量和计算实例。研究结果表明,焦散线法适用于处于平面应力状态下裂纹尖端塑性应力强度因子的测量,其实验设备简单,实验数据处理方便,便于工程应用。
Based on the principle of the method of caustics,the calcuiating formulae for the factorof J-integral of linear elastic fracture mechanics and elasto-plastic fracture mechanics whenmeasured by the said method have been derived.The J-integrals for plexiglass and power-law hardened metals have been measured as examples. Experimental results show that themethod of caustics is suitable for measuring plastic stress intensity factors at the crack tip inthe plane stress state. As the experimenting equipment required is simple and the data pro-cessing is easy,it is conveninent for application.
出处
《华中理工大学学报》
CSCD
北大核心
1994年第12期91-95,共5页
Journal of Huazhong University of Science and Technology
基金
国家教委资助项目
关键词
断裂力学
焦散线法
J积分
linear elastic fracture mechanics
elasto-plastic fracture mechanics
method of caustics
J-integral,