Abstract:

In order to investigate the relationship between the hybrid structure and the failure mechanism, the impact properties of 2-D triaxial braid-hybrid laminated composites with same layers, under low impact velocity, were investigated. In the case of same laminating layers, the cracks generated on the surface of braid-hybrid laminated composites were more than that on the surface of braid non-hybrid laminated composites. And the extending range of cracks on the impacted surface was larger along the longitudinal direction, while on the back surface, it was larger along the transverse direction. The absorbed energy per thickness of carbon fiber + glass fiber+ carbon fiber braided laminated composite was 7.61% higher than the composites composed of only carbon fiber layers, while the glass fiber+ carbon fiber +glass fiber braided laminated composite increased by 2.21% than the glass fiber braid laminates. The hybrid laminated composites generated less damage propagation along thickness direction. The braid laminated composites can’t delaminate easily under low velocity impact. And the impact properties can be effectively improved through suitable hybrid laminating and fiber combination to achieve positive hybrid effect.