Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Experimental Behaviors of the Constraint Effects A2 Depending on Displacement at Various Measuring Positions near Crack Front for STS 316L CT Specimen

균열선단 변위측정위치에 따른 STS 316L의 구속효과 A2 거동

  • 한민수 (목포해양대학교 기관시스템공학부) ;
  • 장석기 (목포해양대학교 기관시스템공학부)
  • Published : 2009.05.31
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Abstract

The magnitude of constraint effect $A_2$ values on the non-linear elastic plastic fracture toughness was experimentally estimated by using displacement at various measuring positions near crack tip. Constraint effect $A_2$ value was dependent on specimen configuration and on the measured displacement near crack front. The crack tip opening displacement in the vicinity of the crack tip front should be estimated within plastic region when appropriately constraint effect was calculated. It was found that the magnitude of constrain effect |$A_2$| is below 8.0 at the crack tip. But an appropriate location to measure the effective constraint effects $A_2$ at the critical value of J that crack initiation is characterizable by is r = 2mm and ${\theta}=90^{\circ}$ away from original crack tip, and the constraint effect |$A_2$| estimated is 5.3.

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References

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