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

被引：0

作者：

Jie X. ^{[1
]}

Li L. ^{[1
]}

Hu Y. ^{[1
]}

Xie X. ^{[1
]}

Wu Y. ^{[1
]}

机构：

[1] Beijing Institute of Structure and Environment Engineering, China Academy of Launch Vehicle Technology, China Aerospace Science and Technology Corporation, Beijing

来源：

Hangkong Dongli Xuebao/Journal of Aerospace Power | 2023年 / 38卷 / 01期

关键词：

life prediction; thermal environment; thin-walled structure; titanium alloy; vibration fatigue;

D O I：

10.13224/j.cnki.jasp.20210422

中图分类号：

学科分类号：

摘要：

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. © 2023 BUAA Press. All rights reserved.

引用

页码：55 / 60

页数：5

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