INFLUENCE OF CLAMPING FOR OUT-OF-PLANE WELDING DISTORTION MITIGATION DURING THIN STEEL PLATES WELDING

摘要

Thin steel plates is usually employed for lightweight application, while welding distortion in particular welding induced buckling, will significantly influence dimensional accuracy of thin-walled structure. As elementary investigation of out-of-plane welding distortion mitigation, butt and fillet welded joints with thin plates were experimentally conducted with considering clamping influence. Effective thermal elastic plastic FE computation was proposed to examine mechanical response caused by welding, and large deformation theory was applied to represent welding induced buckling. Good agreement between measured data and computed results can be observed. Furthermore, 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.