GAO Hua CHEN Youxuan LI Ming Shanghai University of Engineering Science
,
Shanghai
,
ChinaCHEN Dehai Shanghai Dalong Machinery
,
Shanghai
,
China Associate Professor
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Dept.of Materials
,
Shanghai University of Engineering Science
,
Shanghai 200051
,
China
金属学报(英文版)
The effect of proportional and non-proportional overloading on mode l fatigue crack growth have been studied,and the influences of crack tip plastic zone,crack tip blunting as well as crack closure were discussed.Proportional(model I)overloading may cause more serious crack growth retardation than non-proportional(mixed mode)overloading.Therefore,for estimating the fatigue life of engineering structures to simplify a real overload which may of- ten be non-proportional as a proportional one is not always safe.
关键词:
non-proportional overloading
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