High thermal stresses are known to arise in fibre reinforced plastics for cryogenic applications. These, together with mechanical stresses, i.e. inner pressure, may cause micro cracks, which can increase gas permeability. Thus a thorough choice of materials combination shall be carried out for this kind of application. Here several numerical and experimental investigations are executed, which show a dependence of ply strength on the laminate lay up. Furthermore the room and cryogenic helium permeability of carbon fibre reinforced epoxies is measured under thermal and mechanical loads and their potential in this application field is assessed
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High thermal stresses are known to arise in fibre reinforced plastics for cryogenic applications. These, together with mechanical stresses, i.e. inner pressure, may cause micro cracks, which can increase gas permeability. Thus a thorough choice of materials combination shall be carried out for this kind of application. Here several numerical and experimental investigations are executed, which show a dependence of ply strength on the laminate lay up. Furthermore the room and cryogenic helium perm...
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