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pISSN : 1598-706X / eISSN : 2288-8381


한국주조공학회지 (39권1호 1-6)

On Shrinkage Cavities Shape Modeling for Fatigue Simulation of A356 Alloy Specimen

A356 합금 시편의 수축공 결함형상에 대한 피로해석용 형상 모델링 방법

Si-Young Kwak*,** and In-Sung Cho*,**




During the casting process, it is possible to minimize shrinkage and blowholes by modifying the casting design. However, it is impossible to eliminate these factors completely. Therefore, mechanical design engineers apply a sufficient safety factor owing to the possibility of insufficient performances of the cast products. In this paper, prediction method of the fatigue life of cast products containing shrinkage is conducted by using CT (computed tomography) and the SSM (shape simplification method), and additional fatigue analyses are carried out. The analysis results are then compared to results from actual experiments on samples with shrinkage defects. It is found to be that the considering actual shrinkage in cast products by means of stress and fatigue analyses is more accurate and effective. It is also considered that the proposed hot spot method provides us a good tool to predict the fatigue lifes of cast product