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YANG Xin-qi, HUO Li-xing, ZHANG Yu-feng, LIU Yue-li. APPROXIMATE CALCULATION OF J-INTEGRAL OF PRESSURE PIPES WITH CIRCUMFERENTIAL SURFACE CRACK[J]. Engineering Mechanics, 2002, 19(4): 75-80.
Citation: YANG Xin-qi, HUO Li-xing, ZHANG Yu-feng, LIU Yue-li. APPROXIMATE CALCULATION OF J-INTEGRAL OF PRESSURE PIPES WITH CIRCUMFERENTIAL SURFACE CRACK[J]. Engineering Mechanics, 2002, 19(4): 75-80.
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APPROXIMATE CALCULATION OF J-INTEGRAL OF PRESSURE PIPES WITH CIRCUMFERENTIAL SURFACE CRACK

  • School of Material Science and Engineering, Tianjin University, Tianjin 300072

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  • Received Date: November 03, 2000
  • Revised Date: January 21, 2001
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    • Abstract
  • The estimation methods (SC.ENG1 and SC.ENG2) of J-integral for pipes with circumferential surface crack are discussed in detail and the 3D elastic-plastic finite element model for circumferentially surface-cracked pipe is established to testify the feasibility of above methods. The 3D elastic-plastic fracture analysis is conducted to study the distribution of J-integral along the front of surface crack, and the effects of pipe material with different yield plateau on J-integral values are discussed. The feasibility of these J-integral estimation methods for pipe steel with different yield plateau used in China is also discussed in detail.
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