Study on Stress Relief Analysis and Deformation of Thin-walled Structural Parts in Milling by Using Finite Element Method

XU Feifei; LIU Qiguang; LYU Jie; JIN Xin

doi:10.13433/j.cnki.1003-8728.20230287

Volume 43 Issue 1

Jan. 2024

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Article Navigation > Mechanical Science and Technology for Aerospace Engineering > 2024 > 43(1): 96-102

XU Feifei, LIU Qiguang, LYU Jie, JIN Xin. Study on Stress Relief Analysis and Deformation of Thin-walled Structural Parts in Milling by Using Finite Element Method[J]. Mechanical Science and Technology for Aerospace Engineering, 2024, 43(1): 96-102. doi: 10.13433/j.cnki.1003-8728.20230287

Citation:

XU Feifei, LIU Qiguang, LYU Jie, JIN Xin. Study on Stress Relief Analysis and Deformation of Thin-walled Structural Parts in Milling by Using Finite Element Method[J]. Mechanical Science and Technology for Aerospace Engineering, 2024, 43(1): 96-102. doi: 10.13433/j.cnki.1003-8728.20230287

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Study on Stress Relief Analysis and Deformation of Thin-walled Structural Parts in Milling by Using Finite Element Method

doi: 10.13433/j.cnki.1003-8728.20230287

Baimtec Material Co., Ltd., Beijing 100095, China

Received Date: 2023-03-17
Publish Date: 2024-01-25

Abstract

Abstract

Thin-walled parts are widely used in aerospace applications, and their manufacturing accuracy directly determines the performance of the equipment in service. However, the effect of the heat treatment leads to the existence of residual stresses in thin-walled parts prior to machining. If not properly controlled, it is very easy to cause the part to exceed the tolerance. Therefore, for 7075 aluminum alloy sheet, the principle of residual stresses generated in the quenching and pre-stretching of the sheet is analyzed. Furthermore, the generation process of residual stresses in 7075 aluminum alloy blanks in the quenching process and pre-stretching is simulated by using the finite element method. It was found that the quenched residual stresses were reduced up to 91.2% when the blank was stretched by about 3% with a plastic strain of about 2.4%. According to the reduction of residual stresses, a simulation model for milling of thin-walled structural parts is established to simulate the milling deformation under the coupling effect of the multiple factors. The correctness of the simulation results is verified by using the milling experiments.
- stress relief,
- thin-walled structure part,
- finite element simulation,
- residual stress,
- machining distortion

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References(21)

References

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