Evaluation for fracture resistance curves of nuclear real pipes using curved equivalent stress gradient (curved ESG) specimens

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• 作者：Tao Shen^a ; Keon-tae Park^a ; Jae-gu Choi^a ; Byung-Woo Moon^a ; Jae-Mean Koo^b ; Chang-Sung Seok^b ; ^{seok@skku.edu}
• 关键词：Real pipe ; Fracture resistance curve ; Constraint effect ; Crack-opening stress
• 刊名：Engineering Fracture Mechanics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：169
• 期：Complete
• 页码：89-98
• 全文大小：2008 K
• 卷排序：169

文摘

Curved equivalent stress gradient (curved ESG) specimen was proposed. Instead of J-Q theory, the crack-opening stress gradient was used to design specimen. J-R tests were performed on real pipes and various types of specimens. FEA method was applied to obtain the parameters for calculation of J-R curves. The J-R curves of nuclear real pipes were evaluated more precisely with curved ESG specimen.