Experimental observation of induced anisotropy of the Mullins effect in particle-reinforced silicone rubber

Guilherme Machado (1) , Grégory Chagnon (1) , Denis Favier (1)

1 UGA [2016-2019] - Université Grenoble Alpes [2016-2019]

This study is concerned with the experimental observation of anisotropy induced by the Mullins effect in a particle-reinforced silicone rubber. Like many filled rubber-like materials, filled silicone exhibits highly nonlinear mechanical behavior. This nonlinearity is characterized by large strain levels under static conditions, a non-linear stress-strain response and strain rate dependence. However, experimental data concerning the influence of tensile loading cycles in one direction on the stress-softening in other tension directions is quite scarce. In this scope several tension cyclic tests were carried, using a filled silicone rubber material, in order to evidence the anisotropy of the stress-softening phenomenon. The results lead to the conclusion that tensile cycles in one direction practically do not cause the Mullins effect in tension in the perpendicular direction. Nevertheless, the level of influence of the Mullins effect developed in one tension direction on tension behavior for intermediate directions could be measured with respect the different angles in plane. Thus, the anisotropy of the Mullins effect becomes clearly evident.

Domaines: Matériaux

Guilherme Machado, Grégory Chagnon, Denis Favier. Experimental observation of induced anisotropy of the Mullins effect in particle-reinforced silicone rubber. SIXTH EUROPEAN CONFERENCE ON CONSTITUTIVE MODELS FOR RUBBER, Sep 2009, Dresde, Germany. pp.511-515. ⟨hal-01395960⟩