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Analysis of small surface crack growth of round bar under rotary bending stress

회전굽힘응력하에서 환봉재의 미소표면균열의 성장거동해석

Oh, Hwan-Seop;Lee, Byeong-Gwon;Park, Cheol-Hui
오환섭;이병권;박철희

  • Published : 1998.01.01

Abstract

The purpose of this study for the prediction of fatigue crack propagation behavior, Stress Intensity Factor(F) of round bar with 3-Dimensional half circular, semi-elliptical icro surface crack under rotary bending stress for the variable aspect, size, rotation angle was analyzed by Boundary Element Method (BEM). It is predicted that behavior of crack growth is half circular or circular crack (b/a.geq.1) and propagate to b/a.leq.0.85.

Keywords

Rotary Bending;Boundary Element Method;Stress Intensity Factor;Surface Micro-crack growth