Fracture cause analysis for right rear suspension bolt of a certain type of machine powertrain

Ting He; Zhihui He; Yuqing Fu; Xiangdong Liu

doi:10.1117/12.3054922

4 November 2024 Fracture cause analysis for right rear suspension bolt of a certain type of machine powertrain

Ting He, Zhihui He, Yuqing Fu, Xiangdong Liu

Author Affiliations +

Proceedings Volume 13420, Third International Conference on New Materials, Machinery, and Vehicle Engineering (NMMVE 2024); 134200Y (2024) https://doi.org/10.1117/12.3054922
Event: International Conference on New Materials, Machinery, and Vehicle Engineering 2024, 2024, Dalian, China

Abstract

The right rear suspension bolt of a certain machine powertrain was fractured in durability tests. In order to analyze the cause of fracture, the macroscopic fracture morphology analysis, micromorphology analysis, metallographic structure analysis, hardness and composition tests of the bolt were carried out first. The metallographic structure, hardness and composition test results showed that the bolt material met the requirements. The results of fracture morphology analysis show that the failure mode of the faulty bolt is Low-cycle high-stress fatigue fracture. In order to further explore the cause of bolt fracture, We established the finite element model of the powertrain and frame, then extracted the load of the right rear suspension bolt of the machine powertrain. The faulty bolt was checked according to the extracted load. The bolt strength was insufficient to meet the requirements of clamping force, which was the main reason for the failure. Referring to the research in this article, this fault was solved by improving the connection design and increasing the number of bolts.

Citation Download Citation

Ting He, Zhihui He, Yuqing Fu, and Xiangdong Liu "Fracture cause analysis for right rear suspension bolt of a certain type of machine powertrain", Proc. SPIE 13420, Third International Conference on New Materials, Machinery, and Vehicle Engineering (NMMVE 2024), 134200Y (4 November 2024); https://doi.org/10.1117/12.3054922

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