摘要
断裂力学中的应变能密度因子理论正确地表述Ⅰ、Ⅱ、Ⅲ型和混合型的断裂问题,可以用来判断裂纹开裂和开裂方向.本文利用普通光弹性和全息光弹性的方法测取了裂纹尖端处的应变能密度因子和裂纹将要开裂时的方向.测取的开裂方向与实验的结果相符.
Crack initiation and direction can be determined by using the theory of strain-energy-density factor in mechanics of fracture. The theory correctly describes the problem of Ⅰ, Ⅱ, Ⅲ mode and mixed mode fracture. In this paper ordinary and holographic photoelastic methods are used the determine strain-energy-density factor at crack tip and the direction along which the crack will extend. The initial direction determined agrees with experimental results.
出处
《实验力学》
CSCD
北大核心
1990年第3期289-294,共6页
Journal of Experimental Mechanics
关键词
裂纹
应变能
密度因子
断裂
光测法
strain-energy-density factor
fracture
crack
photoslasticity
