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Reference Stress Based J-Integral Estimates Along the Semi-Elliptical Surface Crack Front

반타원 표면균열 선단을 따른 참조응력 기반의 J-적분 예측

  • Published : 2004.06.01

Abstract

This paper discusses applicability of the enhanced reference stress method to estimate J-integral along the semi-elliptical surface crack front. It is found that angular variations of normalized J­integral are strongly dependent on the geometry, loading mode and loading magnitude. As application of the reference stress approach to semi-elliptical surface cracks implies proportional increases in the normalized J-integral, the present results pose a question in applicability of the reference stress approach. However, investigation of the error in the estimated J-integral in the present work suggests that the enhanced reference stress approach, recently proposed by authors, provides an effective engineering tool fur estimating crack driving force along the semi-elliptical surface crack front.

Keywords

Semi-Elliptical Surface Crack;Enhanced Reference Stress Method;J-integral;J Estimation;Crack Driving Force

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