Transactions of the Korean Society of Mechanical Engineers (대한기계학회논문집)
- Volume 7 Issue 4
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- Pages.441-450
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- 1983
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- 1225-5963(pISSN)
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A Method of Determination of Crack Growth Resistance Curve by J Integral
J적분 을 이용한 균열성장 저항곡선 의 결정
Abstract
A reasonable J-resistance curve determination procedure is suggested by correcting the amount of overestimation in J-value whose effect becomes significant when crack grows. Experiments using compact tension specimens of an alloy steel (SCM4, K.S. Designation) are performed. The value of J estimated according to this procedure is compared with that as obtained from the method by Merkle and Corten. The conditions for J controlled crack growth proposed by Hutchinson and Paris are examined for the material used here. It appears that J resistance curve, which is independent of crack ratio can be obtained for those specimens satisfying the conditions of J controlled crack growth.
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