含环向内裂纹圆筒和喷嘴角裂纹体的标准载荷

The Normalised Load for Hollow Cylinder with Inner Hoop Crack and Jet Nozzle with a Corner Crack

通过分析含环向内部裂纹圆筒和喷嘴角裂纹体的h_1～n曲线,获得了这两种裂纹体的标准载荷。给出了关于应变硬化指数n的拓宽范围内的J积分计算公式和所需数据。

Through the analysis of h_1-n curve of cylinder with an internal hoop crack and jet nozzle with acorner crack, this paper determines the normalised loads for the cracked bodies and gives the J-integral estimation formula as well as the needed data in widened interval of strain hardening exponent. This problem plays an important part in prac- tical applications of elastic-plastic fracture mechanics.