Analysis of the effect of rough contact surfaces on the electrical properties of composite skin

Modelling of typical lap structures of composite aircraft skins and construction of rough contact surfaces using stochastic signal simulation methods have been used to investigate the electrical properties of composite aircraft skins affected by the roughness of the contact surface of the lap structure. Based on the constructed lap structure of skins with different roughness, the heights of the rough bumps, the slopes of rough bumps, and the areas of rough surfaces of the contact surfaces are calculated for the influence on the electrical properties. Simulation and calculation results show that the external morphology of the contact surface roughness bumps has a greater impact on the electrical performance of the skinned lap structure . Adopting appropriate treatment of the contact surface roughness can effectively improve the electrical performance of the skinned lap structure.