Fatigue crack propagation from a hole in thin-walled tubular steel specimens under torsional-axial loading

被引：0

作者：

Tanaka, Keisuke ^{[1
]}

Akiniwa, Yoshiaki ^{[1
]}

Takahashi, Akihiro ^{[1
]}

Mikuriya, Teruaki ^{[1
]}

机构：

[1] Department of Mechanical Engineering, Nagoya University, Nagoya-shi, Aichi 464-8603, Furo-cho, Chikusa-ku

来源：

Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A | 2003年 / 69卷 / 06期

关键词：

Combined stress; Crack opening displacement; Crack propagation; Fatigue; J-integral; Stress intensity factor; Torsion;

D O I：

10.1299/kikaia.69.1001

中图分类号：

学科分类号：

摘要：

Fatigue tests of crack propagation from a circular notch in thin-walled tubular specimens made of a medium-carbon steel were performed under cyclic torsion with and without superposed static and cyclic axial loading. The propagation path of Mode I fatigue cracks followed the direction perpendicular to the maximum direction of the total range of the normal stress. The propagation rate was faster than the uniaxial data when compared at the same range of the stress intensity factor or the effective stress intensity factor. The negative nonsingular stress induced excessive plasticity ahead of the fatigue crack, which accelerated the fatigue crack. The J-integral range was proved to be an appropriate parameter for crack propagation with excessive plasticity under combined loading.

引用

页码：1001 / 1008

页数：7