Analysis of thermal growth of sheet metal roofing as a result of direct lightning discharges

The article presents a theoretical introduction and simulation results of the thermal impact of lightning current on metal roofing. Lightning discharge, characterized by a high current peak, is a severe fire or explosion hazard source, even at a relatively short duration. Based on real-world solutions, a digital model was defined in the Ansys Multiphysics environment, and then a simulation analysis was performed using it. Analytical calculations verified the obtained results.