Modeling of permeation and damage in graphite/epoxy laminates for cryogenic fuel storage

摘要: Abstract Polymer–matrix composite (PMC) materials are ideal for aerospace structural applications, such as cryogenic fuel tanks of reusable launch vehicles (RLVs) and expendable (ELVs), due to their high strength-to-weight stiffness-to-weight ratio. For the confident application these materials, it is necessary evaluate permeation caused transverse matrix cracks in conjunction with inter-ply delaminations resulting an intersecting network passages. In this paper, expression predicting delaminated crack opening displacement (DCOD) derived based on first-order shear laminate theory applied five-layer three-layer models. The DCOD obtained using both model verified a two-dimensional finite-element analysis. A mathematical predict permeability graphite–epoxy system (IM-7/PETI-5) developed Darcy's law isothermal, viscous flow gases through porous media. results from used input model. Using model, calculated orthotropic lay-up given delamination length, density loading conditions.