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Analysis of the Fracture Cause of the 40CrNiMoA Winch Shaft

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Abstract

In recent years, the failure of winch shafts has garnered significant attention due to their critical role in various industrial applications. This study aims to investigate the fracture cause of a 40CrNiMoA winch shaft, which had been used for three years. A comprehensive analysis, including visual inspection, fractography and metallography, conventional mechanical property testing, CAE simulation was conducted to identify the primary factors contributing to the shaft failure. The results show that the shaft failure was a rotating bending fatigue fracture event. A combination of manufacturing defects, material properties and operating conditions led to the fracture of the winch shaft. The CAE simulation results indicate that the right-angle radius at the shaft shoulder forms a stress concentration effect, and the nominal stress at this location exceeds the fatigue strength limit, leading to the initiation of fatigue cracks. The presence of upper bainite structure in the material results in decreased mechanical properties, which to some extent promotes fatigue cracking.

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Data Availability

The data that support the findings of this study are available from the corresponding author upon reasonable request. E-mail:550484845@qq.com, 136543280@qq.com.

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Acknowledgments

The author has obtained the Science and Technology Plan of Shandong Higher Education Institutions (Approval No. J17KB026) and the Shandong Vocational Education Teaching Reform Research Project (Approval No. 2015252)

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  1. Shandong University of Engineering and Vocational Technology, Jinan, China

    Yanxia Liu, Guangyong Ma & Ranran Liu

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  1. Yanxia Liu
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Correspondence to Ranran Liu.

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Liu, Y., Ma, G. & Liu, R. Analysis of the Fracture Cause of the 40CrNiMoA Winch Shaft. J Fail. Anal. and Preven. 23, 1782–1788 (2023). https://doi.org/10.1007/s11668-023-01715-7

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  • DOI: https://doi.org/10.1007/s11668-023-01715-7

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