Effect of an Angle-Ply Orientation on Compression Strength of Composite Laminates

摘要: An experimental program was initiated to investigate the effect of angle-ply orientations on compressive strength (X{sub 1C}) 0{degree} plies in fiber reinforced composite laminates. Graphite fiber-reinforced epoxy test coupons with generic architecture [0{sub 2}/{+-}{theta}] (where {theta} varied between and 90{degree}) for quasi-isotropic were evaluated. The effective considerably. results related Poisson's ratios laminates high leading transverse tensile strains lower than expected strengths. Specimens [O{sub 2}/{+-}30] had both highest ratio lowest calculated ply-level compression plies. This work has implications selection failure criterion performance, design acceptance testing, laminate architectures optimum combinations shear behavior. Two commonly used criteria, maximum stress Tsai-Wu, predict significantly different strengths depending laminate. implies that biaxial state needs be carefully considered before backing out unidirectional properties.