Discussion on interface fatigue damage of type IV composite hydrogen storage cylinder

Aiming at the life loss and failure of hydrogen storage cylinder caused by repeated charging and discharging of alternating load, based on the fracture mechanics method, the progressive damage model of alternating load was introduced at the interface between fiber layer and liner, and the interface damage was discussed. It was concluded that the interface damage was the most serious, and the main cause of fatigue crack was interface shear.