A predictive modeling tool for damage analysis and design of hydrogen storage composite pressure vessels |
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Authors: | Ba Nghiep Nguyen Hee Seok Roh Daniel R. Merkel Kevin L. Simmons |
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Affiliation: | 1. Pacific Northwest National Laboratory, Richland, WA 99354, USA;2. Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA |
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Abstract: | In this paper, a predictive modeling tool is developed for damage analysis and design of hydrogen (H2) storage composite pressure vessels. It integrates micromechanics of matrix cracking into a continuum damage mechanics (CDM) description for damage evolution, and three-dimensional (3D) finite element (FE) modeling of the vessel structural response. At the scale of the composite layer (mesoscale), the temperature-dependent stiffness reduction law in terms of the damage variable for transverse matrix cracking is computed using an Eshelby-Mori-Tanaka approach (EMTA) for the initial composite thermoelastic properties and a self-consistent model for the stiffness reduction as a function of the damage variable. While transverse matrix cracking obeying a damage evolution relation can progressively evolve from an initiation to a saturation state, fiber failure is predicted by a micromechanical fiber rupture criterion that accounts for the fiber strength and matrix stress that can be computed within EMTA. The implementation of this integrated multiscale modeling model into a 3D FE formulation enables damage analysis and design of H2 storage composite pressure vessels. The developed tool is illustrated through 3D damage analyses of a cryogenically compressed H2 storage vessel model subjected to thermomechanical loadings to investigate effects of the helical layer fiber orientation and loading scenario on damage development, vessel integrity and burst pressure. |
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Keywords: | Hydrogen storage pressure vessel Micromechanics Continuum damage mechanics Transverse matrix cracking Fiber rupture |
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