| EFFECT OF NON-PROPORTIONAL OVERLOADING ON FATIGUE CRACK GROWTH |
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| 作者姓名： | GAO Hua CHEN Youxuan LI Ming Shanghai University of Engineering Science Shanghai ChinaCHEN Dehai Shanghai Dalong Machinery Shanghai China Associate Professor Dept.of Materials Shanghai University of Engineering Science Shanghai China |
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| 作者单位： | GAO Hua CHEN Youxuan LI Ming Shanghai University of Engineering Science，Shanghai，ChinaCHEN Dehai Shanghai Dalong Machinery，Shanghai，China Associate Professor，Dept.of Materials，Shanghai University of Engineering Science，Shanghai 200051，China |
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| 摘 要： | The effect of proportional and non-proportional overloading on mode l fatigue crack growthhave been studied,and the influences of crack tip plastic zone,crack tip blunting as well ascrack closure were discussed.Proportional(model I)overloading may cause more seriouscrack growth retardation than non-proportional(mixed mode)overloading.Therefore,forestimating 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.
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| 收稿时间： | 1991-02-25 |
| 修稿时间： | 1991-02-25 |
EFFECT OF NON-PROPORTIONAL OVERLOADING ON FATIGUE CRACK GROWTH |
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| GAO Hua CHEN Youxuan LI Ming Shanghai University of Engineering Science,Shanghai,ChinaCHEN Dehai Shanghai Dalong Machinery,Shanghai,China Associate Professor,Dept.of Materials,Shanghai University of Engineering Science,Shanghai ,China.EFFECT OF NON-PROPORTIONAL OVERLOADING ON FATIGUE CRACK GROWTH[J].Acta Metallurgica Sinica(English Letters),1991,4(1):59-64. |
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| Authors: | GAO Hua CHEN Youxuan LI Ming Shanghai University of Engineering Science Shanghai ChinaCHEN Dehai Shanghai Dalong Machinery Shanghai China Associate Professor Deptof Materials Shanghai University of Engineering Science Shanghai China |
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| Abstract: | 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. |
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| Keywords: | non-proportional overloading fatigue crack growth mixed mode loading |
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