Recent progress in the energy characterization of the mechanical behaviour of rubbers

Jean-Benoit Le Cam (1)

1 IPR - Institut de Physique de Rennes

The hysteresis observed in the mechanical response of rubbers (especially filled rubbers) is classically assumed to be fully due to viscosity. Complete energy balances carried out during cyclic deformation show that viscosity is not systematically the preponderant contribution to the hysteresis loop the mechanical energy brought to the material is not entirely dissipated into heat but can be predominantly used by the material to change its microstructure. Predicting changes in temperature, and consequently the self-heating, is therefore not possible from the mechanical response only. This has been evidenced by defining a ratio in terms of energy. A new way of interpretation of the rubber resistance can therefore by found through its ability to store mechanical energy.

Mots clés: Hysteresis; Viscosity; Cyclic deformations; Energy characterization; Filled rubbers; Mechanical behaviour; Mechanical energies; Mechanical response; Recent progress; Self-heating; Rubber; Constitutive models

Domaines: Physique [physics]

Jean-Benoit Le Cam. Recent progress in the energy characterization of the mechanical behaviour of rubbers. 11th European Conference on Constitutive Models for Rubber, 2019, Jun 2019, Nantes, France. pp.147-150, ⟨10.1201/9780429324710-26⟩. ⟨hal-02499973⟩