Investigating the Mechanism of Out-of-Plane Deformation in Q345 Steel Single-pass Bead-on Welded Joint with External Restraint

doi:10.3901/JME.2018.14.090

Abstract

Abstract: The mechanism of out-of-plane deformation in Q345 steel thin-plate bead-on joint with external restraint was investigated by means of both numerical simulation and experiment. Based on the commercial software ABAQUS, a thermo-elastic-plastic finite element method with the consideration of material nonlinearity, geometrical nonlinearity, and boundary nonlinearity was developed to simulate the temperature field, residual stress field and welding deformation in low alloy high tensile strength steel thin-plate joints. Meanwhile, the experiments are carried out to measure the out-of-plane deformations in thin-plate welded joints. The effectiveness of the developed computational approach is verified based on the comparison between the simulated results and the corresponding experimental measurements. The average compressive stress of the middle cross-section and the critical buckling stress are examined. The influence of different external constraint positions on both longitudinal and transverse plastic strain distributions is investigated numerically. The simulated results show that the external restraint cannot reduce the out-of-plane deformation effectively when buckling distortion occurs in the thin-plate welded joint. Whereas, it can decrease the out-of-plane deformation to certain extent before buckling distortion appears.

Key words: buckling distortion, external restraint, nonlinearity, welding deformation

CLC Number:

TG404

LIU Jianqiao, LI Ziliang, REN Sendong, LIANG Wei, DENG Dean. Investigating the Mechanism of Out-of-Plane Deformation in Q345 Steel Single-pass Bead-on Welded Joint with External Restraint[J]. Journal of Mechanical Engineering, 2018, 54(14): 90-97.

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