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논문 기본 정보

자료유형
학술저널
저자정보
양원존 (한국재료연구원) 오충석 (금오공과대학교)
저널정보
Korean Society for Precision Engineering Journal of the Korean Society for Precision Engineering Journal of the Korean Society for Precision Engineering Vol.39 No.5
발행연도
2022.5
수록면
363 - 369 (7page)
DOI
10.7736/JKSPE.022.011

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초록· 키워드

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The main shaft of a mechanical press inevitably includes significant stress concentrations that can trigger severe mechanical damage and finally lead to failure under repetitive use. In this study, an efficient procedure to quantitatively evaluate the fatigue life of the shaft system including the main shaft and its support bearings, based on the macroscopic failure analysis of the main shaft broken during actual use, was investigated. For this purpose, the bearing support was modeled as an elastic foundation, and the elastic foundation stiffness value was varied to determine the optimal value that best simulates the failure behavior, especially with respect to the failure location and failure sequence, of an actual shaft. While the finite element mesh size was kept the same, only the effect of elastic foundation stiffness was investigated. The optimum value for the main shaft investigated in this study was approximately 60 N/mm³, and the fatigue life of the shaft was evaluated based on the conventional maximum principal stress theory. Based on this, two modified designs to enhance the fatigue life of the existing shaft are proposed.

목차

1. Introduction
2. Details of Main Shaft
3. Failure Analysis by Macro Fractography for a Failed Main Shaft
4. Fatigue Life Estimation of Main Shaft by Finite Element Analysis
5. Conclusions
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