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오환섭(Oh Hwan Sup),정효진(Jung Hyo Jin),김기호(Kim key ho) 한국생산제조학회 2005 한국공작기계학회 추계학술대회논문집 Vol.2005 No.-
In this research, for find a stress Intensity Factor K of double surface crack, the BEM was selected. Using 3D BEM, Stress Intensity Factor of double surface crack was calculated for strength of material and its life estimation. And try to find behavior of crack growth. In this research, surface part of crack is more interfered than the deep part. And then, in the deep part, ratio of oval did not affect. In case of different size, crack growth was expected from the bigger one. As a result, we can know that size of crack affect in crack growth.