The Impact of Residual Stress Relaxation on Fatigue Life Enhancing Effect of Cold Expansion

摘要：

　　A numerical analysis was perform ed,using three-dimensional finite element method to assess the im pact of residual stress relaxation on the fatigue strength benefit of cold expansion.Fatigue lives of cold expansion hole m ade from aluminium alloy 7050-T7451 under different relaxation time are presented,the results reveal th at the fatigue life enhancing ratio is inversely proportional to the stress relaxation tim e,residual stress relaxation can weaken the benefit of cold expansion strongly.

关键词： Residual Stress Stress Relaxation Cold Expansion Fatigue Life Enhancing Ratio

作者: GUAN Di SUN Qin

作者单位: School of Aeronautic,Northwestern Polytechnical University,Xian,Shanxi,710072,China

会议类型: 国际会议

会议名称: the 2nd International Conference on Electronic & Mechanical Engineering and Information Technology (EMEIT-2012)(2012年电机工程与信息技术国际会议)

会议地点: 沈阳

会议语种:英文

页码: 2221-2224

在线出版日期: 2012-09-26（万方平台首次上网日期，不代表论文的发表时间）