Impact Damage Modes and Residual Flexural Properties of Composites Beam

The damage evolutions under low velocity impact were investigated using epoxy composite beams reinforced by S-2 glass, basalt, and Twaron 1000 fiber (identified as GFRP, BaFRP, and AFRP, respectively). GFRP showed a mutational damage mode, while BaFRP and AFRP represented a progressive one. The damage modes, the reductions in flexural strength and modulus in the direction of the impact face and the back face were compared based on the difference...