Fatigue damage-healing model based on plasticity change for copper film by laser repair

被引：2
作者：
Liu, Xiao-Dong [1 ]
Shang, De-Guang [1 ]
Sun, Guo-Qin [1 ]
机构：
[1] Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, Beijing 100124, Peoples R China
来源：
INTERNATIONAL JOURNAL OF DAMAGE MECHANICS | 2019年 / 28卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Change of plasticity; fatigue ductility; healing variable; enhancement variable; residual fatigue life prediction; MICROSTRUCTURAL RESPONSE; HIGH-CYCLE; SHOCK; FRAMEWORK; MECHANICS; RECOVERY;
D O I：
10.1177/1056789518812923
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A healing method for fatigue damage was investigated by laser shock peening and laser irradiation with excimer laser for polycrystalline copper film. It is found that the sum of the consumed fatigue ductility and the total fatigue ductility for damaged specimen after both laser treatments is equal to the total fatigue ductility for undamaged specimen after both laser treatments. According to the relationship of plasticity, two variables are defined. One is healing variable and the other one is enhancement variable. Based on the relationship of damage variable, healing variable and enhancement variable, a residual fatigue life prediction method is proposed. The results show that the predicted lives by the proposed method agree well with the experimental results.
引用
收藏
页码：1053 / 1074
页数：22
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