EXPERIMENTAL STUDY ON FRETTING FATIGUE OF 2024 ALUMINUM ALLOY UNDER ALTERNATING NORMAL LOAD (MT)

ZHANG YuXuan; LI Xin; YANG JianWei; TIAN Shuai; LIU LeQiang

doi:10.16579/j.issn.1001.9669.2023.04.028

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EXPERIMENTAL STUDY ON FRETTING FATIGUE OF 2024 ALUMINUM ALLOY UNDER ALTERNATING NORMAL LOAD (MT)

更新时间：2023-09-25

- EXPERIMENTAL STUDY ON FRETTING FATIGUE OF 2024 ALUMINUM ALLOY UNDER ALTERNATING NORMAL LOAD (MT)
- Journal of Mechanical Strength Issue 4, Pages: 962-969(2023)
- 作者机构：
  
  1. 北京建筑大学机电与车辆工程学院
  2. 城市轨道交通车辆服役性能保障北京市重点实验室
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2023.04.028
  CLC：
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ZHANG YuXuan, LI Xin, YANG JianWei, et al. EXPERIMENTAL STUDY ON FRETTING FATIGUE OF 2024 ALUMINUM ALLOY UNDER ALTERNATING NORMAL LOAD (MT). [J]. Journal of Mechanical Strength (4):962-969(2023)
DOI：

ZHANG YuXuan, LI Xin, YANG JianWei, et al. EXPERIMENTAL STUDY ON FRETTING FATIGUE OF 2024 ALUMINUM ALLOY UNDER ALTERNATING NORMAL LOAD (MT). [J]. Journal of Mechanical Strength (4):962-969(2023) DOI： 10.16579/j.issn.1001.9669.2023.04.028.

摘要

针对法向交变载荷作用下的2024铝合金微动疲劳失效问题开展了试验研究。设计了可施加交变法向载荷与远端载荷的双轴加载微动疲劳试验系统。通过Abaqus有限元分析，对试验台法向加载装置进行分析计算，考察了法向加载时力传导误差与微动垫摆角对试验精度的影响，验证了试验机加载的精度。进而研究了在交变法向载荷作用下，0°、45°、90°三种不同相位差对2024铝合金疲劳寿命的影响。试验结果表明，随着相位差的增加，2024铝合金试件的寿命逐渐增加。通过对磨损状态的分析发现，0°与45°相位差下，磨损的影响较小，寿命随着相位差的增大而增长；90°相位差时磨损较为严重，在磨损与疲劳损伤的共同作用下，90°相位差状态下试件的疲劳寿命进一步增加。试件微动疲劳寿命在交变法向载荷作用下的整体趋势为：随着相位差的增加寿命延长，随着相位差的增加，磨损增加。

Abstract

Fretting fatigue failure of 2024 aluminum alloy under alternating normal load was investigated. A biaxial fretting fatigue test system is designed which can apply alternating phase load and distal load. Through Abaqus finite element analysis, the normal loading device of the test bench was analyzed and calculated, and the influence of the force conduction error and the swing angle of the fretting pad on the test accuracy was investigated, the accuracy of loading test machine is verified. The influence of phase difference of 0°, 45° and 90° on fatigue life of 2024 aluminum alloy under alternating normal load was studied. The test results show that the life of 2024 aluminum alloy specimens increases with the increase of phase difference. Through the analysis of wear state, it is found that the influence of wear is small when the phase difference is 0° and 45°, and the life increases with the increase of phase difference. When the phase difference is 90°, the wear is more serious. Under the joint action of wear and fatigue damage, the fatigue life of specimens at 90° phase difference is further increased. The overall trend of fretting fatigue life of specimens under alternating normal load is that the life increases with the increase of phase difference, and the wear increases with the increase of phase difference.

关键词

微动疲劳交变法向载荷2024铝合金有限元分析

Keywords

Fretting fatigueAlternating normal load2024 aluminum alloyFinite element analysis

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