Calculation of the Crack Length for a Pipe Specimen using the Modified Load Ratio Method

수정된 하중비법을 이용한 배관 시험편의 균열 길이 계산

  • 최정훈 (성균관대학교 기계공학부) ;
  • 구재민 (성균관대학교 기계공학부) ;
  • 석창성 (성균관대학교 기계공학부) ;
  • 허용 (삼성전자 생활가전사업부) ;
  • 박재실 (삼성전자 생활가전사업부)
  • Published : 2009.12.01


The objective of this paper is to apply the load ratio method to the measurement of the crack length of the real scale pipe specimen. The load ratio method was modified and finite element analyses were performed to derive the relationship between the normalized compliance and the normalized crack length for the pipe specimen. In order to measure the crack length, the direct current potential drop method and the modified load ratio method were applied to the pipe test. The applicability of the modified load ratio method was confirmed by comparing the calculated crack length with the measured crack length from the pipe experiment.


Pipe Specimen;J-R Curve;Direct Current Potential Drop Method;Load Ratio Method


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