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article
Optimisation de la résistance au cisaillement interlaminaire (RCIL) des matériaux composites fabriqués par LRI en fonction des paramètres de fabrication
Abstract
Optimization of Interlaminar Shear Strength (ILSS) of composites materials made by Liquid Resin Infusion (LRI) according to the manufacturing parameters. The liquid resin infusion (LRI) process is a composite manufacturing technique where liquid resin infuses through the thickness of the preform reinforcement. Understanding the physical phenomena occurring during vacuum infusion process (VIP) allowed to identify the manufacturing parameters that have the largest effects on the variation of mechanical properties of composite structures. These parameters are classified by tree sets: texture reinforcement, process configuration and process temperatures. An experimental plan was designed to identify the relationship between the manufacturing parameters and mechanical properties of infused composites. The goal of this study is to propose and optimize the mechanical properties of quadri axial carbon non-crimp-fabric (NCF)/epoxy RTM 6 composites according to the LRI process parameters. In this research, influences and effects of these parameters on the Interlaminar Shear Strength (ILSS) and the void contentVpof structures made were analysed statistically. Results showed the in-crease ofVpdepending on increasing of mould temperature and increasing of curing tem-perature of epoxy RTM 6 resin. Void content inside infused composites increases when, thenumber of carbon NCF layers which constitutes the preform reinforcement increases. Thislast result is confirmed with the consideration of the number of carbon NCF layers in aunique manner like a influenced process parameter. This result is verified also when thenumber of NCF layers is in interaction between number of high porous media (HPM) layersfabric. This fabric helps draining resin alongthe length of structure during the process. Theanalysis proved that the Interlaminar shear properties are influenced by void content.