Welding Distortion Analysis of a Laser Welded Thin Box Structure

Kim, Choong-Gi; Kim, Jae-Woong; Kim, Ki-Chul

Journal of KWJS 2007;25(5):72-77.
Published online December 3, 2007.

얇은 박스형 용접구조물의 용접변형 해석

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Welding Distortion Analysis of a Laser Welded Thin Box Structure

Choong-Gi Kim, Jae-Woong Kim, Ki-Chul Kim

Abstract

Prediction and control of the thermal distortion is particularly important for the design and manufacture of welded thin metal structure. In this study, numerical computations are performed to analyze effect of structure section shape and weld line location on distortion. In addition, this study aims to develop a thermal elasto-plastic simulation using finite element method to predict distortion, with particular emphasis on bending deformation generated in outline welding of a thin box structure.
From the numerical analysis, it was revealed that the section shape and weld line location play an important role on the welding distortion. Among 3 types of section shape design proposed in this study, the least deformation remained in the two path welded structure.

Key Words: Welding distortion, Laser welding, Thin metal structure, Bending deformation, Finite element method