Effect of Projectile Material on Failure Behavior of CFRPs under Projectile Impact

Since aircrafts are at inevitable risks from foreign object damage (FOD) consisting of various kinds of materials, it is important to understand the effects of projectile materials on the damage behavior of CFRP. In this study, we conducted impact tests and investigated the effects of projectile materials on impact phenomena of CFRP by using three-dimensional (3D) measurement of the deformation process under high-velocity projectile impact. It was revealed that the ballistic limit range for penetration was affected by the kinetic energy of the projectile and that this kinetic energy was proportional to the diameter of the projectile in case that projectile was not deformed. When projectile was deformed, i.e., its deformation energy was not negligible small, which resulted in higher ballistic limit and small damage as compared with no deformed projectiles.