MODELING THE CONSTITUTIVE RESPONSE OF AN ANISOTROPIC DUAL-SCALE FLOW

摘要: Today’s trend in composites manufacturing is to reduce cost by, among other things, cutting down the number of operations required produce a component. For example all steps impregnation reinforcement, consolidation, forming and finally curing may be, some cases, combined into single processing operation. This leads increasingly complex processes with many interacting sub-processes occurring simultaneously on different spatial temporal scales. In this context we are developing an unified finite-strain continuum framework [1],[2],[3],[4], which recently adopted towards modeling dual-scale flows composite [5]. context, present work consider so called Engineering Vacuum Channel (EVaC) prepreg materials as discussed e.g. [6]. Even though our numerical capable at ones, constitutive models for these still rare have not been generalized proper context. summary, idea emanate from existing model fluid follow rectangular channel (the Poiseuille flow) generalize it The major task then extend account anisotropic Darcian interaction macro scale implement it, while minor examine between preform deformation scales process micro infiltration flow. accomplished by introducing permeability coupled displacement-pressure, non-linear finite element model, approached using representative example, displaying relevant interactions involved sub-processes. algorithm tested drained conditions, results compared one [5] isotropic