On cavitation and macroscopic behaviour of amorphous polymer-rubber blends |
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Authors: | Naima Belayachi Noureddine Benseddiq Moussa Na?t-Abdelaziz Adel Hamdi |
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Affiliation: | 1.Laboratoire de Mécanique de Lille (UMR CNRS 8107), USTL, Ecole Polytechnique Universitaire de Lille, cité scientifique, avenue P Langevin, 59655 Villeneuve d’ascq Cedex, France;2.ENI Val de Loire, Laboratoire de Mécanique et Rhéologie, rue de la Chocolatterie, 41034 Bloie, France |
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Abstract: | The macroscopic behaviour of rubber-modified polymethyl methacrylate (PMMA) was investigated by taking into account the microdeformation mechanisms of rubber cavitation. The dependence of the macroscopic stress–strain behaviour of matrix deformation on the cavitation of rubber particles was discussed. A phenomenological elastic-viscoplastic model was used to model the behaviour of the matrix material, while the rubber particles were modelled with the hyperelasticity theory. A two-phase composite material with a periodic arrangement of reinforcing particles of a circular unit cell section was considered. Finite-element analysis was used to determine the local stresses and strains in the two-phase composite. In order to describe the cavitation of the rubber particles, a criterion of void nucleation is implemented in the finite-element (FE) code. A comparison of the numerically predicted response with experimental result indicates that the numerical homogenisation analysis gives satisfactory prediction results. |
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Keywords: | finite-element modelling rubber cavitation damage elastic-viscoplastic polymer matrix composite |
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