Study on Impact and Perforation Properites of CF-GF/Polyester Composites

Abstract

There have been many studies on the impact properties of carbon-fiber reinforced plastics composite materials (CFRP). Most of them are concerned with the evaluation and improvement of impact properties of CFRP, because the fracture strain of carbon-fiber (CF) is very small and its brittle nature is a matter of inquiry.
In this paper, high speed impact tests using foreign projectile were performed on CF/GF hybrid composites and CFRP materials, which are composed of laminate plates, and the impact properties and fracture patterns of these materials were investigated.
The results obtained showed the hybrid effectiveness of CF/GF composites, that is, the increase of impact fracture energy and the change of fracture pattern of these materials. Especially the mixing of GF materials into CF laminated plates was found to cause the enlargement of whitening area damaged by foreign projectile and thus the increase of impact fracture energy of these materials.