会议专题

Micromechanical analysis of high-cycle fatigue intrusion for single crystals with geometry change influence

A micromechanical study of the single crystal fatigue intrusion growth under highcycle fatigue loading was presented. Based on the micromechanical fatigue crack initiation theory proposed by Lin (1992), the geometry change effect during intrusion process was considered to investigate the increase of intrusion. The influence of the geometry variation caused by intrusion was taken into account through varying the stress influence coefficients. The stress influence coefficients were updated according to the current geometry and the calculation was performed by a three dimensional boundary element analysis. This updated process was continued till the saturated state of fatigue crack initiation is reached. For comparison the hysteresis loops for both cases, with and without the geometric effect of intrusion were presented. Numerical results show that the intrusion growth could be very important for predicting the fatigue crack initiation due to intrusion.

Dong-dong Wang Tung-hua Lin

Department of Civil Engineering, Xiamen University, Xiamen 361005, Fujian Province, China Department of Civil & Environmental Engineering, University of California,Los Angeles, CA 90095, USA

国际会议

The 5th International Conference on Nonlinear Mechanics(第五届国际非线性力学会议)

上海

英文

287-291

2007-06-11(万方平台首次上网日期,不代表论文的发表时间)