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比例加载下应力幅比对2A12-T4疲劳寿命的影响

时新红 张建宇 鲍蕊 费斌军

时新红, 张建宇, 鲍蕊, 等 . 比例加载下应力幅比对2A12-T4疲劳寿命的影响[J]. 北京航空航天大学学报, 2010, 36(8): 965-968.
引用本文: 时新红, 张建宇, 鲍蕊, 等 . 比例加载下应力幅比对2A12-T4疲劳寿命的影响[J]. 北京航空航天大学学报, 2010, 36(8): 965-968.
Shi Xinhong, Zhang Jianyu, Bao Rui, et al. Effect of stress amplitude on high-cycle fatigue life of 2A12-T4 aluminum alloy under proportional loading[J]. Journal of Beijing University of Aeronautics and Astronautics, 2010, 36(8): 965-968. (in Chinese)
Citation: Shi Xinhong, Zhang Jianyu, Bao Rui, et al. Effect of stress amplitude on high-cycle fatigue life of 2A12-T4 aluminum alloy under proportional loading[J]. Journal of Beijing University of Aeronautics and Astronautics, 2010, 36(8): 965-968. (in Chinese)

比例加载下应力幅比对2A12-T4疲劳寿命的影响

基金项目: 凡舟基金资助项目(20100501)
详细信息
    作者简介:

    时新红(1981-),女,山东德州人,博士生, shixinhong@buaa.edu.cn.

  • 中图分类号: O 346.2

Effect of stress amplitude on high-cycle fatigue life of 2A12-T4 aluminum alloy under proportional loading

  • 摘要: 采用2A12-T4铝合金漏斗形试件,针对不同拉扭应力幅比,进行了比例加载下多轴高周疲劳寿命试验,研究了不同应力幅比对多轴高周疲劳寿命的影响.针对试验结果,采用3种常用的多轴高周疲劳寿命预测模型,包括等效应力准则、应力不变量准则、临界面准则进行了预测.结果表明:在相同的Von-Mises等效应力下,随着扭转应力幅与拉压应力幅比值的增大,疲劳寿命逐渐升高.等效应力准则的预测结果或过于危险,或过于安全;应力不变量准则的预测结果认为应力幅比的变化对疲劳失效没有影响,与试验结果不符;临界面准则的预测结果优于其他准则.

     

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出版历程
  • 收稿日期:  2009-06-02
  • 网络出版日期:  2010-08-30

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