预腐蚀对多部位损伤发生概率的影响

张建宇; 袁军; 时新红

预腐蚀对多部位损伤发生概率的影响

北京航空航天大学航空科学与工程学院, 北京 100191

详细信息

中图分类号: V 215.2; O 346
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出版历程
- 收稿日期: 2011-11-08
- 网络出版日期: 2013-01-31

Effect of pre-corrosion on the MSD occurrence probability

School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 针对飞机结构中存在的多部位损伤(MSD,Multiple Side Damage)问题,对预腐蚀后多细节结构MSD发生概率进行分析研究.预腐蚀条件选为3.5%NaCl溶液浸泡240 h.通过7B04-T74铝合金单细节预腐蚀-疲劳及常规环境疲劳试验,得到了预腐蚀影响系数C.确定了预腐蚀后的MSD发生概率与常规疲劳试验MSD发生概率之间的关系.建立了预腐蚀后的MSD发生概率公式.通过与试验结果对比表明:新的公式可以很好地反映试验结果.
- 多部位损伤 /
- 预腐蚀 /
- 发生概率 /
- 影响系数
Abstract: Aimed at the multiple side damage(MSD) existed in the typical aircraft structural components,the occurrence probability of multiple side damage was investigated. The condition of pre-corrosion was dipping in 3.5% NaCl solution for 240 hours. The influence coefficient C was obtained based on the pre-corrosion and the normal fatigue experiment of 7B04-T74 aluminum alloy single detail specimens. The relationship could be estalished between the MSD occurrence probability under the specified pre-corrosion and the MSD occurrence probability under the normal fatigue condition. The formula of MSD occurrence probability after per-corrosion was gained. The calculation and experimentation results were compared. Results show that the new formula can compute the MSD occurrence probability after pre-corrosion commendably.
- multiple side damage(MSD) /
- pre-corrosion /
- occurrence probability /
- influence coefficient

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参考文献(6)

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