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J. Ocean Eng. Technol. 2002;16(1):46-51.    

A Study on the Effect of Stress Concentration Factor Determined by 3D-ESPI System on the Fatigue Life
3D-ESPI 시스템을 이용하여 결정된 응력집중계수가 피로수명에 미치는 영향에 관한 연구
김경수,심천식
인하대학교 선박공학과,인하대학교 선박공학과
© 2002 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
Keywords: 3D-ESPI System, Fatigue Life, Stress Concentration Factor, Semi-circular Edge Notch, Strain Distribution
핵심용어: 3차원 전자스패클패턴 간섭시스템, 피로수명, 응력집중계수, 끝단반원노치, 변형률 분포
Abstract
Fatigue life estimation by the theoretical stress concentration factors are, in general, considerably different from test results. And in calculating stress concentration factor, it is very difficult to consider actual geometry and material property which are the notch shapes, imperfections or defects of materials such as porosities inclusions and casting defects, etc. Therefore, the paper deals with the experimental method to find out the more exact stress concentration factors by measuring the strain distributions on each specimen by 3D-ESPI(Electronic Speckle Pattern Interferometry) System. Then the fatigue lives are compared between theoretical calculations using stress concentration factors determined by 3D-ESPI system and fatigue test results.


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