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    Residual Stress Prediction of Butt-Welded Joints for Thick-Walled Pipe Using Heat-Input Method

    Source: Journal of Pipeline Systems Engineering and Practice:;2024:;Volume ( 015 ):;issue: 004::page 04024039-1
    Author:
    Peishan Ding
    ,
    Linwei Ma
    ,
    Xiaotao Zheng
    DOI: 10.1061/JPSEA2.PSENG-1566
    Publisher: American Society of Civil Engineers
    Abstract: Residual stress of a welding joint based on finite element simulation was predicted to gain popularity in the process equipment industry. As for the nuclear power industry, the weldment located in a primary coolant system should be evaluated to verify the boundary integrity. The weld residual stress is an important load for leaks before break or fatigue crack growth estimation. Heat input is a key factor to accurately simulate the weld’s residual stress. Hence, heat transfer activities of weld beads, based on the theoretical volume heat generation rate of the weld element, were simulated using finite element analysis. The traditional method of controlling heat input in finite element method simulation of the welding process is achieved by setting the temperature monitoring point. When the melting temperature is reached, the calculation for weld bead melting is terminated. However, it does not comply with the real welding process because too many assumptions are involved. Therefore, a novel heat input function to modify the temperature differences of weld beads and weld layers was proposed to predict the temperature and residual stress field. Four simulations based on the modified heat input methods and traditional approaches were performed to predict the weld residual stress field of a butt-welded joint for thick-walled pipe and were compared with experimental data. Results show that more accurate thermal fields and weld residual stress fields were achieved using the proposed heat input approach.
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      Residual Stress Prediction of Butt-Welded Joints for Thick-Walled Pipe Using Heat-Input Method

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    contributor authorPeishan Ding
    contributor authorLinwei Ma
    contributor authorXiaotao Zheng
    date accessioned2024-12-24T10:00:33Z
    date available2024-12-24T10:00:33Z
    date copyright11/1/2024 12:00:00 AM
    date issued2024
    identifier otherJPSEA2.PSENG-1566.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4298123
    description abstractResidual stress of a welding joint based on finite element simulation was predicted to gain popularity in the process equipment industry. As for the nuclear power industry, the weldment located in a primary coolant system should be evaluated to verify the boundary integrity. The weld residual stress is an important load for leaks before break or fatigue crack growth estimation. Heat input is a key factor to accurately simulate the weld’s residual stress. Hence, heat transfer activities of weld beads, based on the theoretical volume heat generation rate of the weld element, were simulated using finite element analysis. The traditional method of controlling heat input in finite element method simulation of the welding process is achieved by setting the temperature monitoring point. When the melting temperature is reached, the calculation for weld bead melting is terminated. However, it does not comply with the real welding process because too many assumptions are involved. Therefore, a novel heat input function to modify the temperature differences of weld beads and weld layers was proposed to predict the temperature and residual stress field. Four simulations based on the modified heat input methods and traditional approaches were performed to predict the weld residual stress field of a butt-welded joint for thick-walled pipe and were compared with experimental data. Results show that more accurate thermal fields and weld residual stress fields were achieved using the proposed heat input approach.
    publisherAmerican Society of Civil Engineers
    titleResidual Stress Prediction of Butt-Welded Joints for Thick-Walled Pipe Using Heat-Input Method
    typeJournal Article
    journal volume15
    journal issue4
    journal titleJournal of Pipeline Systems Engineering and Practice
    identifier doi10.1061/JPSEA2.PSENG-1566
    journal fristpage04024039-1
    journal lastpage04024039-8
    page8
    treeJournal of Pipeline Systems Engineering and Practice:;2024:;Volume ( 015 ):;issue: 004
    contenttypeFulltext
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