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6th International Congress of the Croatian Society of Mechanics, Dubrovnik : Croatie (2009)

On the visco-elastic properties of open-cell polyurethane foams

Gianpietro Del Piero 1, Giampiero Pampolini 2, 3

(2009)

This communication is a summary of our previous work [12] on the elastic properties of open-cell polyurethane foams, and an anticipation of some results of a work in progress [2] on the rate-dependent properties of the same material. The elastic properties are described by a two-phase model obtained assuming a non-convex double-well strain energy density. The model captures some peculiar aspects of the stress-strain response of the material, such as strain localization and hysteresis. But it does not capture some typical inelastic effects, such as stress softening in a cyclic test, rate dependence, and memory effects. On the basis of some specific compression tests, we come to the conclusion that these effects can be described within the theory of linear viscoelasticity. This leads us to complete the previous elastic model by adding a visco-elastic element with fractional damping.

1:	Dipartimento di Ingeneria
	Università degli studi di Ferrara
2:	Laboratoire de Mécanique et d'Acoustique (LMA)
	CNRS : UPR7051
3:	Dipartimento di Ingegneria di Ferrara
	Università degli studi di Ferrara

Subject

:

Engineering Sciences/Mechanics/Mechanics of the solides Physics/Mechanics/Mechanics of the solides

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From: Giampiero Pampolini <>

Submitted on: Monday, 22 March 2010 19:54:39

Updated on: Wednesday, 28 April 2010 11:01:07