PS20 CFRP製FW容器の損傷進展解析に関する研究(フェロー賞対象ポスターセッション)

概要

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Composite vessels are used as a substitute for metal vessels in high pressure fuel tank and oxygen tank, because composite vessel is smaller and lighter than metal one of equal performance. They have many design parameters, for example, stacking sequence, layer thicknesses, nding orientations, etc. However, these parameters are not made full use of, because experimental evaluation of pressure vessels requires much time and cost Therefore, numerical evaluation in design can reduce time and cost, and enhance pressure tightness. In this study, we propose a numerical method to analyze the mechanical behaviors of filament-wound vessels. In the proposed method, filament angles at both cylindrical and dome section have been considered, and the development of damage has been estimated by 3D FEM based on damage mechanics. Damage of F'RP was evaluated by Hoffman criterion for composite materials. The numerical results show that the initial damage occurs at the dome section near the end cap, and the mode of damage is transverse creck. In addition, the results show that not only winding angles but also tanic non-uniform deformation is important factor for the final strength.
一般社団法人日本機械学会の論文
2010-10-09