Evaluation of the Burst Strength of FW-FRP Composite Pipes with Low-Modulus Carbon Fiber after Impact

摘要

Impact tests of filament-wound carbon fiber composites pipes were carried out using a drop-weight impact test device developed by the authors. Burst pressure of composite pipes was also measured in order to investigate the burst strength degradation due to impact damage. Depth of fiber breakage region caused by impact test was evaluated after burst strength test. The burst strength of FW-FRP composite pipes after impact was demonstrated to decrease as the increase in cross sectional ratio of damage area. Low-modulus carbon fibers were wound on the surface of the pipes in order to reduce the impact damage. Consequently, it reduced the impact damage and enhanced the residual burst strength.