Un modèle viscoélastique pour la réponse des mousses polymériques à la compression cyclique

Gianpietro del Piero (1) , Giampiero Pampolini (2, 3)

1 Dipartimento di Ingeneria
2 LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]
3 Dipartimento di Ingegneria [Ferrara]

A block of polyurethane foam subject to cyclic compression exhibits a softening phenomenon as the number of cycles increases. In particular, one observes a stepping down of the loading curves while the unloading curves remain the same. In tests performed by the authors, it has been observed a partial recovery of the initial stiffness after a resting period. Indeed, this behaviour can be described as a long memory effect. We propose a viscoelastic model, coupling a non convex energy with a dissipation of viscous type. The model is in a good qualitative agreement with the experiments.

Domaines: Mécanique des solides [physics.class-ph]; Mécanique des solides [physics.class-ph]

Gianpietro del Piero, Giampiero Pampolini. Un modèle viscoélastique pour la réponse des mousses polymériques à la compression cyclique. Mechanics & Industry, 2009, 10 (3-4), pp.261-266. ⟨10.1051/meca/2009054⟩. ⟨hal-00462194⟩