Abstract
ABSTRACT The manufacturing processes involving thermal transitions have been more used in industries nowadays, being the welding one of the most widely used. The requirement to design and predict adverse conditions are fundamental to the development of any mechanical project. As a result, the market needs have motivated the companies to find faster and more effective solutions, being one of a recent tools an ACT (Ansys Customization Toolkit) called “Moving Heat Source”, in which is executed the Gaussian heat source to model welding and laser processes. Based on this, the present work proposes to evaluate the accuracy of that extension implementing a finite element model for the MAG/TIG welding processes in DINCK20 steel and Al6082-T6 aluminium alloy, comparing with one of the first mathematical model proposed by the literature (Rosenthal) and with a recent analytical method of high precision already validated experimentally. The results showed a smaller global error for MAG process (3~10%) when compared to TIG (15~18%) and, the temperatures measured on the surface of the plate presented errors lower than the bottom in both alloys.
Highlights
Nowadays, industries have increased manufacturing processes that involves thermal transitions of which several welding techniques are popular such as GTAW (Gas Tungsten Arc Welding), GMAW (Gas Metal Arc Welding), laser and others (Bajpei et al, 2016; Kik and Górka, 2019; Kumar and Sinha, 2018; Winczek, 2017; Zuo et al, 2020)
The present work proposes to evaluate the accuracy of that extension implementing a finite element model for the Metal Active Gas (MAG)/Tungsten Inert Gas (TIG) welding processes in DINCK20 steel and Al6082-T6 aluminium alloy, comparing with one of the first mathematical model proposed by the literature (Rosenthal) and with a recent analytical method of high precision already validated experimentally
The results of the computation time and total memory used in the numerical simulations is presented in Table 5, where it is shown that the S3 was the most time demanded
Summary
Industries have increased manufacturing processes that involves thermal transitions of which several welding techniques are popular such as GTAW (Gas Tungsten Arc Welding), GMAW (Gas Metal Arc Welding), laser and others (Bajpei et al, 2016; Kik and Górka, 2019; Kumar and Sinha, 2018; Winczek, 2017; Zuo et al, 2020). These technologies are widely used in industries to assemble various products such as automobiles, trains, ships, and bridges (Deng et al, 2007). One of the first steps to avoid such problems is the understanding of thermal phenomena, that affect the structure at macro and micro-structural levels, where is presenting by Fig. 1 and Fig. 2 the welding thermal changes for steel and aluminium alloy
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