Simulation numérique de la fabrication des composites par injection-compression

Écoulement d'un fluide à travers un milieu poreux -- Perméabilité d'un milieu poreux -- Écoulement non permanent à surfaces libres -- Modélisation de l'écoulement de la résine du procédé RTM -- Compaction et consolidation -- Simulation of compression resin transfer molding with displacement control -- Simulation of compression resin transfer molding to manufacture thin composite shells -- Analysis of the consolidation in flexible bladder process for thin composite parts by finite element method

Characterization of multilayered carbon-fiber–reinforced thermoplastic composites for assembly process

The aim of this research work is to characterize the mechanical behavior of multilayered carbon-fiber–reinforced polyphenylene sulfide composites with the application to assembly process of nonrigid parts. Two anisotropic hyperelastic material models were investigated and implemented in Abaqus as a user-defined material. An inverse characterization method was applied to identify the parameters of these material models. Finite element simulations at finite strains of a flexible composite sheet were carried out. Numerical results of sheet deformation were compared with the experimental results in order to evaluate the appropriateness of the material models developed for this application

Inverse procedure for mechanical characterization of multi-layered non-rigid composite parts with applications to the assembly process

In assembly process, non-rigid parts in free-state may have different forms compared to the designed model caused by gravity load and residual stresses. For non-rigid parts made by multi-layered fiber-reinforced thermoplastic composites, this process becomes much more complex due to the nonlinear behavior of the material. This paper presented an inverse procedure for characterizing large anisotropic deformation behavior of four-layered, carbon fiber-reinforced polyphenylene sulphide, non-rigid composite parts. Mechanical responses were measured from the standard three points bending test and the surface displacements of composite plates under flexural loading test. An orthotropic hyperelastic material model was implemented as a UMAT user routine in the Abaqus/Standard to analyze the behavior of flexible fiber-reinforced thermoplastic composites. Error functions were defined by subtracting the experimental data from the numerical mechanical responses. Minimizing the error functions helps to identify the material parameters. These optimal parameters were validated for the case of an eight-layered composite material

Caractérisation du comportement d’une plaque composite de grande dimension

L’assemblage de grands panneaux aéronautiques flexibles, à composites multicouches renforcés de fibres, est très complexe en raison du comportement non linéaire du matériau. L’objectif de nos travaux de recherche est donc de caractériser le comportement mécanique des composites renforcés de fibres lors de l’inspection et de l’assemblage