| 剥蚀对含孔试件疲劳寿命影响研究 |
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| 引用本文： | 郁大照,陈跃良,樊庆和,贾忠湖,高永.剥蚀对含孔试件疲劳寿命影响研究[J].强度与环境,2010,37(2):49-54. |
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| 作者姓名： | 郁大照 陈跃良 樊庆和 贾忠湖 高永 |
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| 作者单位： | 1. 海军航空工程学院飞行器工程系,烟台,264001
2. 海军航空工程学院青岛分院,青岛,266041 |
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| 摘 要： | 剥蚀是影响老龄飞机结构完整性的重要因素之一。本文对LY12CZ铝合金含孔试件进行了预剥蚀疲劳试验,试验结果表明剥蚀使疲劳寿命下降,但其与剥蚀程度并不成正比。运用MSC.Marc中的单元"软化"技术模拟了剥蚀对试件应力分布影响,结果表明最大主应力不但与腐蚀深度有关,还与腐蚀形貌和位置有关。最后基于材料的初始不连续状态(initial discontinuity state,IDS),建立了评估剥蚀对含孔试件疲劳寿命影响的模型。预测值与试验结果比较表明,该模型预测结果精确,方法可靠。
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| 关 键 词： | 剥蚀 疲劳寿命 初始不连续状态 有限元 应力集中 |
Study on the effects of exfoliation corrosion on fatigue life of specimen with hole |
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| Yu Dazhao,Che Yueliang,Fan Qinghe,Jia Zhonghu,Gao Yong.Study on the effects of exfoliation corrosion on fatigue life of specimen with hole[J].Structure & Environment Engineering,2010,37(2):49-54. |
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| Authors: | Yu Dazhao Che Yueliang Fan Qinghe Jia Zhonghu Gao Yong |
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| Institution: | Yu+Dazhao+1+Chen+Yueliang+2+Fan+Qinghe1+Jia+Zhonghu1+Gao+Yong1+(1+Department+of+Airborne+Vehicle+Engineering+Naval+Aeronautical+,+Astronautical+University,Yantai+264001,China,2+Qingdao+Branch+of+Naval+Aeronautical+,+Astronautical+University,Qingdao+266041,China) |
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| Abstract: | Exfoliation is one of important factors which affect fatigue life of aging aircraft structure. Prior exfoliation corrosion fatigue test of specimens with hole was carried out. The results suggest that the level of exfoliated is not the critical factor that governing the life of specimen. The soft inclusion technique was applied to simulate the effect of exfoliation on maximum principal stresses in the MSC.Marc model. The results show that the level, shape and location of exfoliation all have significant eff... |
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| Keywords: | exfoliation corrosion fatigue life initial discontinuity state finite element stress concentration |
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