Effects of Ply Thickness on the Residual Burst Strength of Hoop-Wrapped CFRP Composite Vessels after Out-of-Plane Loading

摘要

The purpose of this study is to evaluate effects of stacking thickness on the microscopic damage behaviors in filament wound carbon fiber reinforced plastics (FW-CFRP) composite vessels subjected to out-of-plane loading. After impact and quasi-static tests, surface and inside microscopic damages were observed with an optical microscope. Residual burst strength was also measured for damaged specimen. Initial stiffness of the specimen under out-of-plane loading increased with increasing CFRP thickness. The successive loading caused fiber breakages and delamination in the all specimens. The absorbed energy and residual deflection of liner became smaller with increasing laminate thickness. The damages of the composite vessels were localized with thicker CFRP layer.