• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2023, Vol. 59 ›› Issue (18): 165-174.doi: 10.3901/JME.2023.18.165

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Research on High Temperature Fretting Fatigue Life Prediction Based on Surface-to-surface Contact Structure

YANG Bowen, GAO Qiang, WANG Shuo, HUO Junzhou   

  1. School of Mechanical Engineering, Dalian University of Technology, Dalian 116024
  • Received:2022-10-08 Revised:2023-05-16 Online:2023-09-20 Published:2023-12-07

Abstract: The small relative displacement of the connection between the aero-engine blade and the wheel disc for a long time will cause fretting fatigue, and the alternating load will cause serious damage to the structure due to the temperature effect. The existing fatigue life model prediction fails to fully consider the impact of high temperature on fretting fatigue, and there is a large gap between the prediction results and the actual engineering life. Therefore, it is necessary to establish a fretting fatigue life prediction model considering the temperature effect. Taking the structure of the aero-engine dovetail as the research object, the fretting fatigue test of high temperature dovetail tenon is designed, and the influence of high temperature on the fretting fatigue damage is discussed. Based on the high temperature fretting fatigue test of dovetail joints, the influence mechanism of high temperature on its fretting fatigue damage is explored, and a high temperature fretting fatigue life prediction model considering temperature effect is proposed, and the accuracy is verified by experiments. The results show that the proposed model has a good correlation with the experimental data, which proves that the model has good prediction accuracy. Optimization improvement and damage tolerance design provide theoretical basis.

Key words: temperature effect, fretting fatigue, life prediction, dovetail tenon

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