ガラス繊維強化プラスチック積層材料の層間引張･せん断強度評価

抄録

Fiber reinforced plastic composite materials are most frequently used as laminated structures. A major disadvantage of composite laminates is the high susceptibility to interlaminar failure due to the lack of through-thickness reinforcement. Hence, the through-thickness characterization of the composite laminates is necessary for adequate and reliable structural design, and characterizing the both through-thickness tensile and shear behavior of the composite laminates is challenging. In this study, we investigated the combined interlaminar tensile and shear behavior of woven glass fiber reinforced polymer (GFRP) composite laminates. We carried out the combined interlaminar tensile and shear tests with cross specimens in various stacking angles (30°, 45°, 60°, 90°) at room temperature (RT) and evaluated the combined interlaminar tensile and shear properties of the woven GFRP composite laminates. The results showed that the cross specimens were fractured along the stacking angle. In addition, the optical microscopy observation revealed the failure characteristics of the woven GFRP composite laminates. Finally, the failure conditions of the specimen were compared with the stress distribution calculated by a three-dimensional finite element analysis (FEA).