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http://dx.doi.org/10.3744/SNAK.2002.39.2.061

A Study on the Fatigue Crack Propagation Analysis Using Equivalent Stress Distribution  

C.W. Kim (한국선급 선체기술부 화물선팀)
I.S. Nho (충남대학교 선박해양공학과)
K.S. Do (한국선급선체기술부 탱커팀)
Publication Information
Journal of the Society of Naval Architects of Korea / v.39, no.2, 2002 , pp. 61-68 More about this Journal
Abstract
From the viewpoint of linear fracture mechanics, the crack propagation behavior of two different structures having the same K-a relationship could be considered identical. In this study the stress distribution in an infinitely wide cracked plate with the same K-a relationship as in a real structure is defined as the equivalent stress distribution. Fatigue life of a real structural element can be predicted by applying the equivalent stress distribution to a simple structural element, and performing a fatigue crack propagation analysis. The K-a relationship for a structural member can be estimated by a finite element method or a simplified prediction method. The validity to obtain effective crack driving stresses by using the equivalent stress-distribution is examined.
Keywords
fatigue; fracture mechanics; equivalent stress distribution; effective crack driving stress;
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