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Compressed gaseous hydrogen (CGH 2 ) vessels must achieve high volumetric energy densities at pressures up to 70 MPa and enhanced gravimetric performance to meet aviation requirements. A critical deficit is the unavailability of efficient iterative design processes for design space optimized composite CGH 2 vessels that integrate reliable, predictive models with manufacturing constraints and an accurate representation and optimization of the carbon fiber-reinforced polymer (CFRP) laminate layup as an essential prerequisite for efficient vessel design and virtual certification. This work proposes a combined analytical-numerical approach for the design of CFR-epoxy wound ellipsoidal CGH 2 vessels. An optimum laminate layup to achieve isotensoid stress states considering non-geodesic fiber placement is analytically determined and mapped on a numerical model to perform burst pressure simulations. Fiber stress distributions and inter-fiber failure are analyzed using Puck criterion to identify necessary design iterations. The elaborated methods enable an efficient development of ellipsoidal composite CGH 2 vessels with increased volumetric design space utilization and gravimetric storage density. Furthermore, it offers considerable potential for flexible adaptation and transferability to other vessel geometries or size scales.
Richter et al. (Fri,) studied this question.