OSIRHYS IV Project, 700 bar on-board composite pressure vessel mechanical behaviour prediction with uncertainties knowledge

International audienceThe hydrogen storage stays a key issue for the high scale deployment of fuel cell applications. The gaseous hydrogen storage at high pressure with type IV vessels is the best technology nowadays. But it is necessary to reach a significant cost reduction of these storage systems. An optimization of the composite structure which can be reached thanks to numerical simulation is needed. The goal of the OSIRHYS IV project is to develop and validate models and methods for composite high pressure design and optimization with behavior uncertainties knowledge. It was decided to limit this study to a particular topology, material and winding process. First burst simulations have been performed and results of linear static computations have been compared to experimental data. Comparisons are about vessel component masses, burst pressure, burst mode and local displacements. Results show that linear static analyses using axisymmetric and volume FE models could already predict with a reasonable accuracy the radial behavior of the tank in the case of a safe burst mode. Nevertheless, provements of partner models are needed to reach better performances. It will be about material and vessel geometry knowledge, behavior modeling and FE model