Several structural members of very large marine vessels i.e. container ships or FPSO are assembled by very thick plates whose thickness exceeds 60 mm. The high-tensile strength steel also has been selected to meet the required structural strength in the joint of the thick plates. Generally, multi-layer welding method such as flux core arc (FCW) welding has been used to join the thick plates since FCA welding generates low residual stress. This paper suggests a finite element analysis (FEA) model to predict the residual stress in welded part joined by FCA welding that has more than 20 layers of weldment. The characteristics of residual stresses in FCW welds of high tensile strength steels (EH40, API-2W Gr. 50) whose tensile strengths were 400 MPa and 500 MPa, respectively is investigated by the FEA and the measurement. Three-dimensional thermal elastic-plastic analyses were conducted to investigate the welding residual stresses. EH40 and API2W-50 plates of 80 mm thickness have been used as the base materials. Double V butt joint configuration has been used for joining the plates. The joint for the specimen was welded with 28 layers. The residual stress was measured by X-Ray diffraction method after the specimen was polished by chemical etching. Also, the residual stress obtained by the FEA has been compared with that of experiment.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Residual stress analysis of multi-layer flux core arc welding in the joint of ultra thick plates


    Beteiligte:
    Lee, Jang-Hyun (Autor:in) / Hwang, Se-Yun (Autor:in) / Yang, Yong-Sik (Autor:in) / Kim, Byung-Jong (Autor:in)


    Erscheinungsdatum :

    2010


    Format / Umfang :

    7 Seiten, 20 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch