Conductive Composite Layer for Lightning Strike Protection

The patent applies composite materials by combining a conductive layer (such as metal foil or conductive fabric) with fibrous reinforcement materials (such as carbon fiber, glass fiber, or aramid fiber) to create a multi-layer composite structure. This composite construction provides both lightning strike protection and maintains mechanical properties, as the fibrous reinforcement contributes to structural strength while the conductive layer provides electromagnetic hazard protection.

The patent employs thin films by using conductive layers in the form of thin metal foils or conductive fabrics with minimal thickness. These thin conductive layers provide effective lightning strike protection while minimizing weight addition to the composite material, as the protective function is achieved with minimal material mass.

The patent applies beforehand cushioning by incorporating the conductive layer into the composite structure in a protected manner during the automated lay-up process. The conductive layer is positioned between plies of fibrous reinforcement material, which cushion and protect it from damage during automated handling, placement, and curing operations, while still allowing efficient automated processing.

The patent applies the nested doll principle by placing the conductive layer between nested plies of fibrous reinforcement material in the composite structure. This nested configuration protects the conductive layer from environmental factors and potential damage, while the outer surface plies maintain the effectiveness of lightning strike protection by providing a continuous conductive path.