Static and Fatigue Tensile Properties of Cross-Ply Carbon-Fiber-Reinforced Epoxy-Matrix-Composite Laminates with Thin Plies

Carbon-fiber-reinforced epoxy-matrix composite (CFRP) laminates with thin plies have strong damage-resistance properties compared standard prepregs. The static and fatigue tensile fracture behavior of cross-ply CFRP should be further studied to establish the applicability thin-ply prepregs for industrial structures. In this study, cross-ply, high-strength polyacrylonitrile (PAN)-based carbon-fiber (T800SC)-reinforced composites were investigated. fiber orientations specimens set [0/90]10S (subscript S means symmetry), [(0)5/(90)5]2S, [(0)10/(90)10]S. characteristics CFRPs thick [0/90]2S [(0)2/(90)2]S also investigated comparison. Under loading, strength failure strain thinnest 90°-ply-CFRP more than 5% higher those other 90°-ply-thickness specimens. However, moduli Poisson’s ratios comparable between plies. responses 3% during lower-fatigue-cycle testing (<105 cycles). higher-fatigue-cycle (>105 cycles), decreased, a decrease in 90°-ply thickness, specimen 7% lower thin- thick-ply-CFRP