北京航空航天大学学报 ›› 2013, Vol. ›› Issue (1): 27-30,41.

• 论文 • 上一篇    下一篇

预腐蚀对多部位损伤发生概率的影响

张建宇, 袁军, 时新红   

  1. 北京航空航天大学 航空科学与工程学院, 北京 100191
  • 收稿日期:2011-11-08 出版日期:2013-01-31 发布日期:2013-01-30

Effect of pre-corrosion on the MSD occurrence probability

Zhang Jianyu, Yuan Jun, Shi Xinhong   

  1. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2011-11-08 Online:2013-01-31 Published:2013-01-30

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.

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.

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