A Probabilistic Study to the Effect of Specimen Thickness on Fatigue Crack Growth Resistance

J. Ocean Eng. Technol. 1994;8(2):47-55.

피로균열전파저항에 미치는 시험편 두께의 영향에 관한 확률론적 연구

김선진,오세규

부산수산대학교 공과대학기계공학과,부산수산대학교 공과대학기계공학과

Keywords: Specimen Thickness, Spatial Stochastic Process, Autocorreation Function, Correlation, Variance, Fatigue Crack Growth Resistance

핵심용어: 시험편 두께, 공간확률과정, 자기상관함수, 상관거리, 분산, 피로균열전파저항

Abstract

The purpose of the present study is to investigate the effect of specimen thickness on statistical properties of crack growth resistance. In this study, the resistance S$delta$$_h$(x) to fatigue crack growth was treated as a spatial stochastic process. which varies randomly on the crack surface. The theoretical autocorrelation functions of the resistance to fatigue crack growth considering specimen thickness are discussed for several correlation lengths. The main results obtained are : (1) The theoretical autocorrelation functions of S$delta$$_h$(x) are almost independent of specimen of specimen thickness except for the origin. (2) The variance increases with decreasing specimen thickness.