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• W4379619005 endingPage "105348" @default.
• W4379619005 startingPage "105348" @default.
• W4379619005 abstract "Green hydrogen is emerging as one of the most promising alternatives to replace fossil fuels. While hydrogen gas has a good energy density by weight, its poor energy density by volume requires it to be stored under high pressure for commercial use. The hydrogen infrastructure developed to handle this high pressure hydrogen contains multiple components made of polymers such as O-rings, pipes, hoses, and inner liners of storage tanks. Although polymers do not react chemically with hydrogen gas, they undergo a mechanical failure when high pressure hydrogen gas is suddenly depressurized. This phenomenon known as ‘rapid decompression failure’ (RDF) occurs due to the diffusion of hydrogen through polymer and getting trapped inside preexisting cavities or voids. In this paper, a continuum mechanics-based coupled diffusion–deformation-damage model was developed to predict the hydrogen distribution, stress distribution, and damage propagation inside the polymer while it undergoes rapid decompression failure. The polymer was modeled as a hyperelastic material because it represents the nonlinear material response observed in uniaxial tensile tests perfectly. The effect of hydrogen diffusivity, preexisting cavity size, cavity location, applied hydrogen pressure, and depressurization rate on damage initiation was studied. It was found that the coefficient of diffusion plays an important role in damage initiation and damage was mostly concentrated in the inside areas rather than near the surface. Experiments were conducted with ethylene propylene diene monomer (EPDM) which agreed well with the predicted trends using the given model. The effect of adding carbon black and silica filler particles and plasticizer to the pure EPDM polymer was also studied. It was found that damage during RDF decreases with the addition of fillers, but increases with the addition of the plasticizer. Finally, the damage evolution in the presence of two cavities was also studied, and was found that the interaction of stress fields around the cavities alters the damage occurring during RDF." @default.
• W4379619005 created "2023-06-08" @default.
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• W4379619005 date "2023-09-01" @default.
• W4379619005 modified "2023-09-26" @default.
• W4379619005 title "A diffusion–deformation model with damage for polymer undergoing rapid decompression failure" @default.
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• W4379619005 doi "https://doi.org/10.1016/j.jmps.2023.105348" @default.
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