确定总应变寿命方程参数的一种方法

王延荣; 李宏新; 袁善虎; 魏大盛; 石 亮

doi:10.13224/j.cnki.jasp.2014.04.019

确定总应变寿命方程参数的一种方法

doi: 10.13224/j.cnki.jasp.2014.04.019

1. 北京航空航天大学能源与动力工程学院,北京 100191;
2. 先进航空发动机协同创新中心,北京 100191;
3. 中国航空工业集团公司沈阳发动机设计研究所,沈阳 110015

详细信息

作者简介:
王延荣(1965-),男,黑龙江双鸭山人,教授,博士,主要从事航空发动机结构强度振动及可靠性研究.

中图分类号: V232.3
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出版历程
- 收稿日期: 2013-03-20
- 刊出日期: 2014-04-28

A method for determination of parameters in total strain life equation

1. School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
2. Co-Innovation Center for Advanced Aero-Engine,Beijing 100191,China;
3. Shenyang Engine Design and Research Institute, Aviation Industry Corporation of China,Shenyang 110015, China

摘要

摘要: 为了使总应变寿命方程能够在较大寿命范围内具有理想的预测精度且其参数物理意义明确,基于总应变寿命方程中疲劳强度系数与疲劳延性系数的物理意义,建立了总应变寿命方程参数与单调拉伸强度极限和断面收缩率之间的关系,并结合TC4,GH4169及GH901合金的单调拉伸及疲劳试验数据,对其各自的总应变寿命方程参数进行了拟合,进而开展了疲劳寿命预测.结果表明:采用该方法确定的总应变寿命方程参数具有明确的物理意义,且对TC4,GH4169及GH901合金的疲劳寿命预测结果较为理想,其分散带基本在2倍以内.
- 总应变寿命方程 /
- 寿命预测 /
- 疲劳强度系数 /
- 疲劳延性系数 /
- 参数拟合
Abstract: In order to improve the prediction precision of total strain life equation in a wide range of fatigue life with the equation parameters having definite physical significance, the relationship among parameters of total strain life equation, monotonic ultimate tensile stress and percentage reduction of area was established based on the physical significance of the fatigue strength coefficient and the fatigue ductility coefficient of total strain life equation. Parameters in the total strain life equation for TC4, GH4169 and GH901 alloy were fitted and fatigue life predictions were carried out combining with monotonic tensile and fatigue test data. The results show that fatigue life predictions using the total strain life equation with the parameters fitted by the developed approach give better estimation within a scatter band of about two for TC4, GH4169 and GH901 alloy.
- total strain life equation /
- life prediction /
- fatigue strength coefficient /
- fatigue ductility coefficient /
- parameter fitting

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参考文献(15)

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