Induced electromagnetic forces of lightning current conducted in composite laminates

The impact of electromagnetic forces induced by lightning current under lightning-induced magnetic fields when lightning strikes to composite laminates was analyzed systematically. The study especially focused on the structural responses induced by electromagnetic forces, which result from the interaction of conducting lightning currents within laminates and their self-inductance magnetic fields. It was observed that the electromagnetic forces predominantly influenced the structural responses in the vicinity of the lightning attachment region, while its influence on the responses distant from the lightning attachment region was minimal or negligible. Otherwise, the structural responses of the composite laminates remained exceedingly weak in comparison the mechanical properties of the laminates, and thus, could not cause damage to the laminates.