Carbon Fiber Composite High-pressure Hydrogen Storage Vessel Mechanical Model Analysis And Anti-fatigue

As the development of the society, the fossil fuels can't afford the requirement of high-speed economic development. A new energy must be developed. The hydrogen energy is a sort of clean energy. It will be the main energy instead of the petroleum at the last period of the era of petroleum. High-pressure hydrogen storage technology has the advantages of low cost, easy operating and quick charge and discharge in normal temperature. This paper does research on designing the lightweight high-pressure hydrogen storage vessel.First, do structural design on carbon fiber reinforced aluminum lined high-pressure hydrogen storage vessel and calculate the main size. The operating pressure is 70MPa, and the volume is 25 liter. It can store about 1kg hydrogen and reach about 5wt% weight storage density.Second, analyze the mechanical model of the hydrogen storage vessel. The whole model is simplified to two submodels to calculate the stress separately. Then verify the stress by maximal stress rule and Tsai-Hill rule and prove the correctness of model simplifying and theoretical calculation by FEA.Finally, make a research on the factors that effect on the fatigue of carbon fiber resin composite (CFRC) and aluminum alloy. The fatigue life of composite materials follows the Cask Theory. Based on introducing the truth that lowering the average stress of the aluminum alloy can increase the fatigue life of the whole hydrogen storage vessel, give the method.The innovation in this paper can be concluded as following: thinking out the simplified mechanical model and the Cask Theory of composite materials.