Effects of influential parameters on fatigue life of metal matrix composites under thermo-mechanical loading

被引：0
|
作者：
Wang, Fang [1 ]
Chen, Zhi-Qian [1 ]
Lü, Shi-Jin [2 ]
机构：
[1] School of Materials Science and Engineering, Southwest University, Chongqing 400715, China
[2] China Ship Scientific Research Center, Wuxi 214082, China
来源：
Chuan Bo Li Xue/Journal of Ship Mechanics | 2010年 / 14卷 / 07期
关键词：
Fatigue of materials - Metallic matrix composites - Mechanisms - Intelligent systems - Volume fraction - Fibers - Weibull distribution - Tensile strength - Ductility - Metals;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The effects of six kinds of influential parameters on fatigue life of continuous fiber-reinforced metal matrix composites were investigated by numerical simulation based upon micromechanical damage mechanisms under cyclical thermo mechanical loading. The results show that, (1) There is an obvious decrease in composite fatigue life as the specimen dimension increased. However the size effect on the fatigue life gets disappeared when the composite size is more than 25 fibers and its length is longer than 30 times fiber diameter. (2) Fiber volume fraction has great influence on fatigue life. When increasing fiber volume fraction, higher life is achieved. (3) The fatigue life of the composite strongly depends on the magnitude of shape parameter in Weibull distribution. As the scatter of the fiber tensile strength decreases the fatigue life of composites will dramatically increase. (4) The greater fatigue ductility coefficient is, the higher fatigue life is; however, the greater the absolute value of fatigue ductility exponent is, the lower fatigue life is.
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页码：765 / 770
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