| 压载对裂纹超载迟滞作用的影响 |
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| 引用本文： | 陈瑞峰,何宇廷.压载对裂纹超载迟滞作用的影响[J].大连理工大学学报,1997,37(1):24-28. |
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| 作者姓名： | 陈瑞峰 何宇廷 |
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| 作者单位： | [1]大连理工大学工程力学研究所 [2]西北工业大学飞机系 |
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| 基金项目： | 辽宁省博士起动基金,大连理工大学“工业装备结构分析”国家重点实验室开放基金 |
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| 摘 要： | 针对在随机载荷谱中拉超载对疲劳裂纹扩展的迟滞作用的研究较多，而对压载作用的研究很少的状况，着重研究了载荷谱中的压载对构件的疲劳寿命的影响。通过对裂纹尖端应力状态的研究，发现压载对超载迟滞现象有抵消作用；它使得有效应力强度因子值增大，并进一步给出了定量估计。
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| 关 键 词： | 超载迟滞 闭合因子 压缩载荷 疲劳裂纹 裂纹扩展 |
Effect of compressive load on overload retardation |
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| Chen Ruifeng,Wang Lisheng,Ren Mingfa.Effect of compressive load on overload retardation[J].Journal of Dalian University of Technology,1997,37(1):24-28. |
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| Authors: | Chen Ruifeng Wang Lisheng Ren Mingfa |
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| Abstract: | There have been many kinds of researches for tensile overload retardation in random loading spectrum, but the effect of compressive load has seldom been studied. Compressive load in random loading spectrum can affect the fatigue life of components. By exploring stress distribution in crack tip, the authors discovered the cutting effect of compressive load on overload retardation, which made the effective stress intensity factor become greater. A quantitative study was given to the effect. |
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| Keywords: | compression/overload retardation crack closure |
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