The Effect of the Projectile Material in a Simulated Bird Strike

概要

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An aircraft may suffer from foreign object damage (FOD) during flight operations, and a bird strike is a potentially serious and damaging FOD event. For simulated bird strike experiments, gelatin has been traditionally used as the projectile material. However, it has not been sufficiently determined how the material properties of the projectile affect the simulated bird strike results, especially for deformable targets. In this work, using gelatin as the conventional simulated bird material, silicone resin is used to investigate the effects of the projectile material properties. Two types of impact tests are conducted. One uses a solid target with a flat face, and the pressure change due to the impact is investigated. The other uses a cantilever target made from aluminum alloy or carbon fiber/epoxy composite laminate to investigate the plastic deformation or damage, respectively. From these experiments, the effects of the projectile material type and properties are evaluated.