力学学报 ›› 2010, Vol. 42 ›› Issue (6): 1225-1230.doi: 10.6052/0459-1879-2010-6-lxxb2009-655

• 研究简报 • 上一篇    下一篇

一种新的多轴高周疲劳寿命预测模型

张成成,姚卫星   

  1. 南京航空航天大学飞行器先进设计技术国防重点学科实验室
  • 收稿日期:2009-10-28 修回日期:2010-01-07 出版日期:2010-12-10 发布日期:2010-12-02
  • 通讯作者: 姚卫星 E-mail:wxyao@nuaa.edu.cn

A new model for life prediction of multiaxial high-cycle fatigue

,   

  1. Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2009-10-28 Revised:2010-01-07 Online:2010-12-10 Published:2010-12-02

摘要: 分析和讨论3种典型载荷(单轴拉压、纯扭及90^\circ非比例)情况下的5组损伤控制参数, 提出了一种以临界面上最大剪切应力幅和最大法向应力的非线性组合作为损伤控制参数的多 轴高周疲劳寿命预测模型, 该模型考虑了平均应力对疲劳寿命的影响, 比现有的疲劳预测模 型具有更宽的金属材料适用范围. 两种不同类型材料下的多轴非比例试验的预测结果表明, 模型的预测结果与试验符合较好.

关键词: 疲劳寿命

Abstract: Several groups of fatigue damage parameters under three typical loading cases (i.e., fully reversed tensional, fully reversed torsional and 90$^\circ$ non-proportional loading) are discussed in this paper and a new life prediction model for multiaxial high-cycle fatigue is proposed. The proposed model is based on a nonlinear combination of the maximum shear stress amplitude and maximum normal stress on the critical plane defined by the plane of maximum shear stress range. A compromising solution to correct the mean normal stress acting on the critical plane is also proposed. The new model also extends the range of metallic materials. The predictions based on the presented model show a good agreement with test data.

Key words: fatigue life

中图分类号: 

  • O346.2