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김철(Cheol Kim),양원호(Wonho Yang),조명래(Myounggrae Cho) 한국자동차공학회 1999 한국 자동차공학회논문집 Vol.7 No.7
In order to use effectively a machinery part with fillet, it is necessary to determine a proper fillet shape in design step. Study of such problem by fracture mechanical criterion is rare. So, this paper focuses on the design of fillet radius in fracture mechanical aspect. Finite element method was used to obtain crack tip stress intensity factor. Stress intensity factor was calculated by COD (crack opening displacement) method proposed by Ingraffea and Manu. The parameters used in this study are thickness ratio, fillet radius, and crack length. If fillet radius increase, crack propagation may be accelerated. Critical crack length is inversely proportional to fillet radius.<br/>