| 铝合金高温低周疲劳裂纹扩展可靠性评估 |
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| 引用本文： | 李旭东,张连峰,朱武峰,丁文勇.铝合金高温低周疲劳裂纹扩展可靠性评估[J].装备环境工程,2013,10(5):134-138. |
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| 作者姓名： | 李旭东 张连峰 朱武峰 丁文勇 |
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| 作者单位： | 海军航空工程学院 青岛校区,山东 青岛,266041 |
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| 摘 要： | 通过对不同温度下6151-T6合金的研究,获得了一种基于可靠性理论的裂纹扩展速率表达式,为预测6151-T6铝合金构件的安全寿命提供依据。该表达式表明,在高温条件下,6151-T6铝合金疲劳裂纹扩展存在门槛值,而且该门槛值会随着环境温度的升高而降低。
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| 关 键 词： | 铝合金 高温 可靠性 疲劳裂纹扩展 |
| 收稿时间： | 2013/4/26 0:00:00 |
| 修稿时间： | 9/1/2013 12:00:00 AM |
Reliability Evaluation of Aluminum Alloy under High Temperature Based on Low CycleFatigue Crack Growth |
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| LI Xu-dong,ZHANG Lian-feng,ZHU Wu-feng and DING Wen-yong.Reliability Evaluation of Aluminum Alloy under High Temperature Based on Low CycleFatigue Crack Growth[J].Equipment Environmental Engineering,2013,10(5):134-138. |
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| Authors: | LI Xu-dong ZHANG Lian-feng ZHU Wu-feng and DING Wen-yong |
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| Institution: | LI Xu-dong;ZHANG Lian-feng;ZHU Wu-feng;DING Wen-yong;Qingdao Campus of Naval Aeronautical Academy; |
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| Abstract: | Fatigue crack growth rate of AA 6151-T6 in high temperature was tested.The fatigue crack growth rate formula was obtained based on reliability theory.The result showed that fatigue crack growth of AA 6151-T6 exists threshold value in high temperature,which decreases with temperature increasing.The purpose was to provide reference for safe life prediction of AA 6151-T6 component.The present thesis made a research on the fatigue crack growth rate of AA 6151-T6 subjected to various elevated,and proposed a reliability based formula to evaluate FCG,which provided the basis of 6151-T6 aluminum alloy component safe life prediction.The method demonstrates the existence of fatigue crack growth threshold value of 6151-T6 aluminum alloy subjected to elevated temperature,which decreases with temperature increasing. |
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| Keywords: | aluminum alloy high temperature reliability fatigue crack growth |
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