Residual stress distributions of high-pressure composite vessel using high energy synchrotron radiation X-rays

菖蒲 敬久; 東條 千太*; 鈴木 純三*; 阪口 善樹*

no journal, , 

A high-pressure composite vessel for hydrogen is requested in order to be spread the fuel-cell car. This composite vessel is made from metallic liner and CFRP and the endurance performance of this vessel receives a big influence according to the residual compressive stress in a metallic liner generated by the CFRP layer. Then, internal distributions of residual stress in high-pressure composite vessel using high energy synchrotron radiation X-rays at BL22XU in SPrng-8 was carried out for evaluation of durability im-provements. The strain scanning method was used to obtain strain distributions of 3 directions. From the distributions by 311 diffraction of aluminum, it was found that the strains of axial and hoop direction were compression and that of radial direction was tensile. And it was clarified that these results almost agreed with residual strains which were expected to generate for high-pressure vessel rolled fiber.