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The influence of viscosity on the response of open-cell polymeric foams in uniaxial compression: experiments and theoretical model

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Abstract

In a preceding paper (Pampolini and Del Piero in J Mech Mater Struct 3:969–981, 2008), the response of blocks made of a polymeric open-cell foam subject to uniaxial compression was analyzed. The hysteretic behavior exhibited in cyclic tests was interpreted within the context of nonlinear elasticity, as an effect of strain localization due to the non-convexity of the energy. Here we study some inelastic aspects of the response, such as rate dependence, strength decay after repeated loading, and memory effects. The analysis of some key experiments led us to the conclusion that viscous effects prevail over plasticity and damage. Consequently, we propose here a visco-elastic model, obtained by adding linear visco-elastic elements to our previous chain of nonlinear elastic springs. The paper is completed by the description of a series of experiments and of numerical simulations.

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Author notes

  1. Giampiero Pampolini

    Present address: Saint-Gobain Recherche, 39, quai Lucien-Lefranc, 93303, Aubervilliers, France

Authors and Affiliations

  1. Dipartimento di Ingegneria, Università di Ferrara, Via Saragat 1, 44100, Ferrara, Italy

    Gianpietro Del Piero

  2. Laboratoire de Mécanique et d’Acoustique, 31 chemin Joseph Aiguier, 13402, Marseille, France

    Giampiero Pampolini

Authors
  1. Gianpietro Del Piero
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  2. Giampiero Pampolini
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Correspondence to Giampiero Pampolini.

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Communicated by Andreas Öchsner.

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Del Piero, G., Pampolini, G. The influence of viscosity on the response of open-cell polymeric foams in uniaxial compression: experiments and theoretical model. Continuum Mech. Thermodyn. 24, 181–199 (2012). https://doi.org/10.1007/s00161-011-0230-9

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  • DOI: https://doi.org/10.1007/s00161-011-0230-9

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