TY - JOUR
TI - Multi-objective calibration of the double-ellipsoid heat source model for GMAW process simulation
AU - Bjelić Mišo B
AU - Radičević Branko S
AU - Kovanda Karel
AU - Kolařík Ladislav
AU - Petrović Aleksandra V
JN - Thermal Science
PY - 2022
VL - 26
IS - 3
SP - 2081
EP - 2092
PT - Article
AB - The scope of application of simulation models in welding is limited by the accuracy of their output results. This paper presents a calibration procedure for a 3-D quasi-stationary model of heat transfer for gas metal arc welding. The double-ellipsoid heat source used in this model has five input parameters whose value cannot be specified accurately. To estimate these values, we employed a multi-objective calibration procedure with two objective functions using the paretosearch optimization algorithm. Objective functions represented the error between simulated and experimentally observed values of penetration depth and weld bead width during gas metal arc welding of P355GH steel plates. All input parameters were assumed to be a power function of line energy. To reduce computational time, we replaced the numerical model with a response surface methodology metamodel based on an optimal set of simulation results from the numerical model. The results of the simulations based on calculated values of input parameters for the heat source model showed excellent matching with the experimental results.