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机群结构耐久性分析的裂纹萌生方法

贺小帆 隋芳媛 王天帅 李玉海

贺小帆, 隋芳媛, 王天帅, 等 . 机群结构耐久性分析的裂纹萌生方法[J]. 北京航空航天大学学报, 2016, 42(5): 865-870. doi: 10.13700/j.bh.1001-5965.2015.0368
引用本文: 贺小帆, 隋芳媛, 王天帅, 等 . 机群结构耐久性分析的裂纹萌生方法[J]. 北京航空航天大学学报, 2016, 42(5): 865-870. doi: 10.13700/j.bh.1001-5965.2015.0368
HE Xiaofan, SUI Fangyuan, WANG Tianshuai, et al. Crack initiation approach for durability analysis on aircraft structures of a fleet[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(5): 865-870. doi: 10.13700/j.bh.1001-5965.2015.0368(in Chinese)
Citation: HE Xiaofan, SUI Fangyuan, WANG Tianshuai, et al. Crack initiation approach for durability analysis on aircraft structures of a fleet[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(5): 865-870. doi: 10.13700/j.bh.1001-5965.2015.0368(in Chinese)

机群结构耐久性分析的裂纹萌生方法

doi: 10.13700/j.bh.1001-5965.2015.0368
详细信息
    作者简介:

    贺小帆 男,博士,副教授。主要研究方向:耐久性与损伤容限、载荷谱编制方法、腐蚀条件下可靠性寿命。Tel.:010-82315738 E-mail:xfhe@buaa.edu.cn

    通讯作者:

    贺小帆,Tel.:010-82315738 E-mail:xfhe@buaa.edu.cn

  • 中图分类号: V215.5

Crack initiation approach for durability analysis on aircraft structures of a fleet

  • 摘要: 为采用裂纹萌生方法(CIA)进行机群结构耐久性分析,需要综合考虑载荷谱分散和结构特性分散,但是关于综合考虑结构特性和载荷谱分散的机群寿命标准差取值应如何确定并未给出明确的方法。为此,进行了某飞机某关键结构7B04 T74铝合金模拟试件在3个单机谱下的耐久性试验,通过断口判读确定试件裂纹萌生寿命,反推得到结构细节的三参数式P-S-N曲线参数,对比分析表明载荷谱差异对P-S-N曲线参数无影响。为描述机群载荷谱分散的影响,提出了机群"当量"P-S-N曲线的概念和参数估计方法。采用疲劳分析方法确定细节裂纹超越概率,对损伤度进行评估,建立了综合考虑结构特性分散和载荷谱分散的CIA。

     

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出版历程
  • 收稿日期:  2015-06-04
  • 网络出版日期:  2016-05-20

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