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Simulation numérique d’un assemblage métal / composite thermoplastique par CMT pins

Abstract : A method is proposed to simulate an innovative multimaterialassembly which has applications in structural lightweight forvehicles. In this assembly, a thermoplastic composite part isfixed on a steel plate, textured by the CMT pins technology.This is an especially complex and nonlinear interface: a finerepresentation of local behaviour would be extremely costlyfor calculation. So, it has been chosen to investigate a model assimple as possible which still demonstrates accurate globalresults.An experimental campaign on double lap shear specimen,inspired by existing state of the art on multimaterial has beenset up to characterize this interface. Once local mechanismshave been understood, two models are proposed and compared.The first is numerical and based on finite elements method andcohesive elements. It allows us to validate the modelhypotheses while describing the effort repartition between thepins. The second one is based on a Representative VolumeElement. It establishes analytically the behaviour law of theinterface. This law is then inserted inside a simplifiednumerical model of the specimen by means of a nonlinearspring. To conclude, these approaches are applied to theindustrial case of study and the result have been validated by asecond experimental campaign.
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Submitted on : Thursday, July 12, 2018 - 12:06:08 PM
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  • HAL Id : tel-01836396, version 1

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Simon Paroissien. Simulation numérique d’un assemblage métal / composite thermoplastique par CMT pins. Matériaux et structures en mécanique [physics.class-ph]. École centrale de Nantes, 2016. Français. ⟨NNT : 2016ECDN0001⟩. ⟨tel-01836396⟩

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