| Investigation on characteristic of J integral parameter in welded joints |
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| 作者姓名： | 霍立兴 张玉凤 康继东 |
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| 作者单位： | Prof. HUO Lixing，Prof. ZHANG Yufeng and KANG Jidong，Welding Department，Tianjin University，Tianjin 300072，P.R. China |
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| 摘 要： | The J integral parameter and its application feasibility in welded joints with different weldmatchings in yield strength (overmatching weld and undermatching weld), different material constitutive laws (material with a Ludes yield plateau and power hardening) and under different fracture types (ligament yielding fracture and general yielding fracture) are investigated. First the condition of J integral path independent has been studied based upon finite element analysis by using ADINA procedure on welded joints. It was shown that the J integral is path dependent for the cases studied in this paper. Then experiments were carried out to study availability of J integral as a plastic singularity parameter at the tip of the notch in welded joints. The results show that J dominance in most cases studied is not validated in v and u displacement fields. From both considerations mentioned above it can be concluded that J-integral as controlling parameter used to estimate the safety of welded structures is not alw
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Investigation on characteristic of J integral parameter in welded joints |
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| Prof. HUO Lixing,Prof. ZHANG Yufeng and KANG Jidong,Welding.Investigation on characteristic of J integral parameter in welded joints[J].China Welding,1997(1). |
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| Authors: | Prof HUO Lixing Prof ZHANG Yufeng and KANG Jidong Welding |
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| Affiliation: | Prof. HUO Lixing,Prof. ZHANG Yufeng and KANG Jidong,Welding Department,Tianjin University,Tianjin 300072,P.R. China |
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| Abstract: | The J integral parameter and its application feasibility in welded joints with different weldmatchings in yield strength (overmatching weld and undermatching weld), different material constitutive laws (material with a Ludes yield plateau and power hardening) and under different fracture types (ligament yielding fracture and general yielding fracture) are investigated. First the condition of J integral path independent has been studied based upon finite element analysis by using ADINA procedure on welded joints. It was shown that the J integral is path dependent for the cases studied in this paper. Then experiments were carried out to study availability ofJ integral as a plastic singularity parameter at the tip of the notch in welded joints. The results show that J dominance in most cases studied is not validated in v and u displacement fields. From both considerations mentioned above it can be concluded that J-integral as controlling parameter used to estimate the safety of welded structures is not always made clear. |
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| Keywords: | integral parameter characteristics welded joint |
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