Vol.21, No.2, 2021, pp. 123–130
UDC:

The application of different strategies for performing welding sequences can affect the quality of the welded joint. The goal of different strategies is the priority in achieving minimal degrees of distortion of welded testpieces. These strategies are especially important for long seam welded joints. In this paper, the segmentation order is optimised using finite element software (FEM) for the AA6060-T4 lap joint of the GMAW welded plates. Input parameters of the numerical simulation are presented in detail. The effects of temperature and residual stress distributions as direct causes of distortion are analysed. Results of these simulations show that adequate sequence selection can reduce welding distortion values by as much as 30 %.

Keywords: arc welding simulation, gas metal arc welding (GMAW), finite element modelling, lap joint, aluminium alloy, welding sequence