Numerical simulation on bucking distortion of aluminum alloy thin-plate weldment

doi:10.1007/s11706-009-0006-3

Front Mater Sci Chin

2009, Vol. 3

Issue (1) : 84-88 https://doi.org/10.1007/s11706-009-0006-3

RESEARCH ARTICLE

Numerical simulation on bucking distortion of aluminum alloy thin-plate weldment

Jun LI(

), Jian-guo YANG, Hai-long LI, De-jun YAN, Hong-yuan FANG

State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China

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Abstract

In this paper, the welding residual distortion of aluminum alloy thin plates is predicted using the elasticity-plasticity finite element method (FEM). The factors contributing to the welding buckling distortion of thin plates are studied by investigating the formation and evolution process of welding stresses. Results of experiments and numerical simulations show that the buckling appearance of thin-plate aluminum alloy weldments is asymmetrical in the welding length direction, and the maximum longitudinal deflection appears at the position a certain distance from the middle point of the side edge towards the arc-startingexists end. The angular deformation direction of thin-plate weldments is not fixed, and the angular deformation value of the arc-starting end is being higher than that of the arc-blowout end.

Keywords aluminum alloy thin plate welding buckling distortion numerical simulation

Corresponding Author(s): LI Jun,Email:lijun20066002@sina.com.cn

Issue Date: 05 March 2009

Cite this article:

Jun LI,Jian-guo YANG,Hai-long LI, et al. Numerical simulation on bucking distortion of aluminum alloy thin-plate weldment[J]. Front Mater Sci Chin, 2009, 3(1): 84-88.

URL:

https://academic.hep.com.cn/foms/EN/10.1007/s11706-009-0006-3
https://academic.hep.com.cn/foms/EN/Y2009/V3/I1/84

Fig.1 Finite element model of workpiece

Fig.2 Temperature dependency of yield strength and Young’s modulus in case of 2A12T4 aluminum alloy

Fig.3 Specific heat, thermal conductivity and thermal expansion coefficient temperature dependency in case of 2A12T4 aluminum alloy

Tab.1 Parameters of welding

Fig.4 Modeling of welding clamp

Fig.5 Simulation result of residual distortion

Fig.6 Simulation results of deflection of longitudinal sections different distances from the welding line

Fig.7 Actual welded piece

Fig.8 Measurement results of deflection of longitudinal sections different distance from the welding line

Fig.9 Change of longitudinal stresses at nodes A, B, C and D with time

Fig.10 Distribution of longitudinal residual stresses along the welding line

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