Lightning protection for composite aircraft

Lightning strikes no longer pose a hazard to aircraft, but they can cause damage – especially to composite-based structures. Recent advancements in modelling tools and cutting-edge numerical methodologies should help ensure protection from lightning strikes.

Over the last few years there has been a sharp increase in the demand for composite materials within new aircraft mainly due to their high strength-to-weight ratio. However, by increasing their fraction, challenges regarding electrical conductivity have arisen, such as lightning strike protection, static discharge and interference shielding. Given that composite materials have poor electrical conductivity, there is a need for a dedicated conductive current return pathway such as an almost equipotential electrical network (ALEEN).

Further details: Lightning protection for composite aircraft