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    Finite Element Predictions of Temperature Distributions in a Multipass Welded Piping Branch Junction

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    Authors
    Jiang, Wei
    Yahiaoui, Kadda
    Hall, Frank Richard
    Issue Date
    2005
    
    Metadata
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    Abstract
    This contribution deals with the complex temperature profiles that are generated by the welding process in the intersection region of thick walled, cylinder-cylinder junctions. These affect material microstructure, mechanical properties and residual stresses. Knowledge of the thermal history and temperature distributions are thus critical in developing control schemes for acceptable residual stress distributions to improve in-service component behavior. A comprehensive study of three-dimensional temperature distributions in a stainless steel tee branch junction during a multipass welding process is presented. A newly developed partitioning technique has been used to mesh the complex intersection areas of the welded junction. Various phenomena associated with welding, such as temperature dependent material properties, heat loss by convection and latent heat have been taken into consideration. The temperature distribution at various times after deposition of certain passes and the thermal cycles at various locations are reported. The results obtained in this study will be used for on-going and future analysis of residual stress distributions. The meshing technique and modeling method can also be applied to other curved, multipass welds in complex structures.
    Citation
    Journal of Pressure Vessel Technology, 127(1): 7-12
    Publisher
    American Society of Mechanical Engineers (ASME)
    Journal
    Journal of Pressure Vessel Technology
    URI
    http://hdl.handle.net/2436/23592
    DOI
    10.1115/1.1845450
    Additional Links
    http://scitation.aip.org/journals/doc/ASMEDL-home/
    Type
    Journal article
    Language
    en
    Description
    This paper has informed industry of the capabilities of advanced simulation to better understand and improve the manufacture of welded joints; in turn, to improve the lifetime and safety of high temperature structures used in the petrochemical and power generation industries. This paper was also presented at the American Society of Mechanical Engineers (ASME) conference in San Diego, USA, and was awarded the best paper prize.
    ISSN
    00949930
    ae974a485f413a2113503eed53cd6c53
    10.1115/1.1845450
    Scopus Count
    Collections
    Faculty of Science and Engineering

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