Volume 38 Issue 1
Jan.  2023
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JIE Xiaoluo, LI Liyuan, HU Youhong, et al. Fatigue life of titanium alloy thin-walled structure under thermal vibration environment[J]. Journal of Aerospace Power, 2023, 38(1):55-60 doi: 10.13224/j.cnki.jasp.20210422
Citation: JIE Xiaoluo, LI Liyuan, HU Youhong, et al. Fatigue life of titanium alloy thin-walled structure under thermal vibration environment[J]. Journal of Aerospace Power, 2023, 38(1):55-60 doi: 10.13224/j.cnki.jasp.20210422

Fatigue life of titanium alloy thin-walled structure under thermal vibration environment

doi: 10.13224/j.cnki.jasp.20210422
  • Received Date: 2021-08-08
    Available Online: 2022-09-05
  • Titanium alloy thin-walled structures are in the thermal vibration environment for a long time. The constantly changing stress produced in the thermal vibration environment may cause structural fatigue failure. A high temperature vibration fatigue testing system was built with the help of vibration test bench, and the random vibration S-N fatigue curves of titanium alloy cantilever thin plate structure were obtained at 20, 150 ℃ and 300 ℃. The fatigue life prediction expression of titanium alloy cantilever thin plate structure at the above temperature was established, and the error between the predicted life and the actual life of the test piece was small, which was only 3.76% at the condition of 300 ℃, 45.36 MPa stress level. The method can be used to study the fatigue performance and life prediction of structures under high temperature random vibration loads.

     

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