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Variation of the Fracture Resistance Curve with the Change of a Size in the CT Specimen
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 Title & Authors
Variation of the Fracture Resistance Curve with the Change of a Size in the CT Specimen
Seok, Chang-Seong; Kim, Su-Yong;
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In order to obtain more realistic fracture resistance curve, research is currently underway to introduce new parameter and to quantify the constraint effect. The objective of this study is to investigate the relationship between the constraint effect of a size(plane size and thickness) and the fracture resistance curve. In this paper fracture toughness tests were performed with various plane size and various thickness of specimens in two materials. The test results showed that the effects of plane size in th4 J-R curve were significant and the curve was risen with an increase in plane size. However, relatively weak influence was observed form the change of the specimen thickness and size. The stress fields near the crack tip of th specimen is close to the HRR field according to increasing the plane size and Q stress appears different value according to material properties and the plane size.
J-R Curve;J-Q Theory;Constraint Effect;Fracture Toughness;
 Cited by
일반구조용강 열간압연 박판에 대한 K-R 곡선 결정,이억섭;이계승;백준호;편장식;

한국정밀공학회지, 2002. vol.19. 9, pp.98-105
시편두께 및 균열깊이 영향을 고려한 비표준시편의 J 시험법 및 구속효과의 정량화,김진수;조수만;김윤재;김영진;

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