<p align="left" class="MsoNormal" style="text-align: left">Thin steel plates are usually employed for lightweight application to improve carrying capacity and decrease fuel consumption, while welding distortion in particular welding induced buckling, will significantly influence dimensional accuracy and its integrity of thin-walled structure such as ship. As elementary investigation of out-of-plane welding distortion mitigation, typical butt and fillet welded joints with thin plates of high tensile strength steel were experimentally conducted with considering clamping influence. Effective thermal elastic plastic FE computation was proposed to examine thermal and mechanical responses caused by welding, and large deformation theory was applied to represent welding induced buckling. Good agreement between measured data and computed out-of-plane welding distortion can be observed when clamping constraint and spring back during its release are considered. Furthermore, thermal elastic plastic FE computation without clamping was also carried out to clarify the difference of plastic strains and residual stress comparing with experimental case. Influence of clamping on out-of-plane welding distortion mitigation was eventually proposed for mechanism understanding. Based on the fact that longitudinal shrinkage force is the elementary driving force to determine the occurrence of welding induced buckling, clamping contribution may reduce the magnitude of out-of-plane welding distortion or influence the deformed mode; however, occurrence of buckling behavior during thin plate welding could not be avoided with clamping application.</p>

Influence of Clamping for Out-of-Plane Welding Distortion Mitigation During Thin Steel Plates Welding

Paper Proceedings: https://asmedigitalcollection.asme.org/MSEC/MSEC2021/volume/85062

2021 International Manufacturing Science and Engineering Conference (MSEC2021)

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