Intensity Factors for a Branched Crack in a Semi-Infinite Plate Under Tension and Bending Moments

인장과 굽힘을 받는 반 무한 평판내의 분기균열에 대한 강도계수

A branched crack in a semi-infinite plate under tension and bending moment is considered. Intensity factors of the stress and moment for the branched crack are evaluated. The stress intensity factors are obtained by using the finite element method and the J-based mutual integral. The moment intensity factors are calculated by extrapolating the values of the moment near the crack tip. Approximate expressions are also obtained as functions of the branched crack length and branching angle.