Growth Characteristics and Life Prediction of Single Surface Fatigue Crack with the Variation of crack Configuration Ratios

J. Ocean Eng. Technol. 1993;7(2):173-181.

균열 형상비 변화에 따른 단일표면파로균열의 성장특성과 수명예측

서창민,서덕영,정정수

경북대학교,경북대학교,한국조폐공사

Keywords: aspect ratio, single surface crack, stress intensity factor range, crack growth model

핵심용어: 형상비, 단일 표면균열, 응력확대계수범위, 균형성장모델

Abstract

This work has been investigated the ralationship between single surface crack length and crack depth have influence on the fatigue life. The simulation based on experimental results of 2.25 Cr-1Mo steel at various crack configuration ratios has enabled successful prediction of fatigue life at room temperature. The effect of crack depth should be considered for predicting fatigue crack growth rates as well as that of surface crack length. It is also shwn that the crack growth mechanisms are in good agreement with expreimental data according to the interaction of crack length and crack depth.