Modélisation du comportement viscoélastique d’une membrane thermoplastique par la méthode des éléments finis
Keywords:
viscoelasticity, biaxial deformation, finite element, validation, inflationAbstract
In this work, we are interested in the modelling and numerical simulation using the dynamic finite element method for the viscoelastic behaviour of a thin, isotropic and incompressible thermoplastic membrane. Thereby, the viscoelastic behaviour of the Lodge model is considered. The lagrangian formulation together with the assumption of the membrane theory are used. The numerical validation is performed by comparing the obtained results with the experimental measured data for the polymeric ABS membrane inflation. Moreover, the effect of the Lodge model behaviour on the thickness ad stress distribution in the membrane are analysed for three different loads. Finally, a simple example of thermoforming part in ABS is presented.
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