Investigation on Welding Buckling Distortion Reduction of Stiffened Plate Structure with External Constrain

doi:10.3901/JME.2024.24.142

Abstract

Abstract: As a flexible and convenient method to control structural welding deformation, external constraint has been widely used in engineering practice. With stiffened structure of 5 mm thickness plate as the main research object, the welding experiments of typical T-joint and corresponding stiffened plate structure were both carried out beforehand, and out-of-plane deformations were observed to represent the welding buckling behavior. Then, the thermal-elastic-plastic finite element method was used to simulate and verify the T-joint and stiffened plate structure, and mechanical mechanism of welding buckling generation was also clarified. The influence of the constraint distance on the buckling distortion of T-joint, as well as the influence of the constraint distribution form and the constraint distance on the welding buckling distortion of stiffened plate structure was studied, and the mechanism of the buckling distortion controlled by external constraint was discussed based on the theory of inherent deformation. The results show that the existence of external constraint can effectively control the welding buckling distortion of T-joint and stiffened plate structure; with mechanical mechanism, the external constraint can significantly reduce the welding inherent deformation, and decrease the magnitude of out-of-plane welding distortion of thin plate welded structure and improve fabrication accuracy. Investigation results can be considered as theoretical basis for welding buckling mitigation of thin plate fabrication, and optimize application strategy of external constraint.

Key words: stiffened plate structure with thin plate, thermal-elastic-plastic finite element analysis, external constraint, welding inherent deformation

CLC Number:

TG481

ZHOU Xiaoli, DU Shizhong, WANG Jiangchao, ZHAO Hongquan, WU Lei. Investigation on Welding Buckling Distortion Reduction of Stiffened Plate Structure with External Constrain[J]. Journal of Mechanical Engineering, 2024, 60(24): 142-152.

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