Paper number 1172
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MESO-STRUCTURAL BEHAVIOUR OF COMPOSITE FABRIC FOR THE SIMULATION OF MANUFACTURING OF THIN COMPOSITE BY SHAPING PROCESS |
J.L. BILLOËT1 and A. CHEROUAT 1,2
1LM2S secteur ENSAM of Paris 151 Boulevard de l'Hôpital 75013 Paris, France
2LASMIS - GSM University of Technology of Troyes BP 2060 10010 Troyes, France
| Summary | The present study concerns the modelling of the behaviour of preimpregnated woven fabric during the forming process. A new numerical model in finite strains has been developed. It make into account the various dominating mechanics in the physics of the mechanical transformation of composite material during the shaping process, namely large angular variations of yarns, viscoelasticity of resin and evolution of possible damages in yarns. Shear and tensile tests of composite fabric specimens are presented to validate the mesostructural approach. Some numerical simulation of shaping process by deep-drawing are proposed and compared with the experimental results. These results examined the importance of understanding the influence of prepreg shaping deformation and manufacturing conditions on the final properties and resulting structure, which in turn can strongly affect the utilization of these material for the manufacturing of high performance composites parts. |
Keywords | preimpregnated fabric, fiite deformation, msostructural approach, corotational formulation, truss and membrane finite elements, viscoelastic behaviour, shaping process. |