Effects of Elements in CFRP on Its Deformation Behavior and Energy Dissipation under Projectile Impact

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  • CFRPの構成要素が飛翔体衝突変形挙動とエネルギー散逸に与える影響
  • CFRP ノ コウセイ ヨウソ ガ ヒショウタイ ショウトツ ヘンケイ キョドウ ト エネルギー サンイツ ニ アタエル エイキョウ

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Abstract

Carbon fiber reinforced plastic (CFRP) is widely used in making structural components of aircraft because of its high specific strength and high specific elasticity. Since aircrafts are inevitable risks from foreign object damage (FOD), it is important to understand the effects of elements, i.e., fiber, matrix resin and interface, in CFRP on the impact phenomena of CFRP by projectile’s impact. In this study, we conducted impact tests and investigated the effects of the elements on its impact phenomena and dissipated energy by using three-dimensional (3D) measurements in the deformation process under high-velocity projectile impact. It was estimated that deformation of CFRP was dissipated more than 30％, ever 70％ in a greater case, of the kinetic energy of a projectile. It was also revealed that the CFRP, consisting of carbon fiber with high-strength and large-failure-strain and deformable resin, could dissipate large kinetic energy of a projectile.

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