A numerical study of the influence of polydispersity on the behaviour until break of a reinforced hyperelastic material with a cohesive interface

Paul-Aymé Toulemonde (1, 2) , Julie Diani (1) , Pierre Gilormini (1) , Nancy Desgardin (2)

1 PIMM - Laboratoire Procédés et Ingénierie en Mécanique et Matériaux
2 DGA Maitrise NRBC - Centre d'Études du Bouchet

Solid propellants manufacturers commonly monitor the granulometries of the explosive fllers they introduce in the material to pack high fller volume fraction and thus obtain satisfactory energetic performance. However, to our knowledge, the effect of a mix of small and large particles in the micrometric size range in flled elastomers has not yet been fully understood. This work aims at producing a better understanding of the underlying mechanisms that take place in a bidisperse flled elastomer composite under uniaxial loading by using finite element simulations. An original process for creating bidisperse microstructures is proposed and analyzed. The key role of the fller/matrix interface is emphasized through the use of a cohesive zone model. Plane- strain simulations in uniaxial tension of such cells with different fractions of large and small particles are performed.

Mots clés: Filled elastomer; Cohesive zone; Polydispersity; Random microstructure; Finite element simulation

Domaines: Mécanique des matériaux [physics.class-ph]

Paul-Aymé Toulemonde, Julie Diani, Pierre Gilormini, Nancy Desgardin. A numerical study of the influence of polydispersity on the behaviour until break of a reinforced hyperelastic material with a cohesive interface. Matériaux & Techniques, 2015, 103, pp.306-1-7. ⟨10.1051/mattech/2015026⟩. ⟨hal-01167823⟩