抄録
Strength limited design of carbon fiber reinforced plastic (CFRP) is very important for hydrogen pressure vessel to reduce the cost with reliability. Authors have approached to evaluate a test piece sized model representing CFRP in the vessel. The model is analyzed by a meso-scale finite element model, where mesoscopic structure of carbon fiber bundle and matrix resin is explicitly handled. The actual test pieces are examined by quasi-biaxial tensile test. As for macroscopic load-strain relationship, the finite element analyses yield good agreement with the experiments. We reveal strain concentration in the vicinity of fiber bundle crossover, which causes burst pressure reduction of the vessels.
