Strain localization in open-cell polyurethane foams: experiments and theoretical model

Abstract : Confined compression tests performed by the authors on open-cell polyurethane foams reveal the presence of strain localization. After a brief description of the experiments, a theoretical model is proposed. In the model, the foam is represented as a chain of elastic springs with a two-phase strain energy density, and the strain localization is due to a progressive collapse of the springs. The collapse is a sort of continuum instability, which can be attributed to phase transition. An appropriate choice of the material constants leads to a close reproduction of the experimental force-elongation response curves.
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Journal of Mechanics of Materials and Structures, Mathematical Sciences Publishers, 2008, 3 (5), pp.969-981
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  • HAL Id : hal-00462199, version 1

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Giampiero Pampolini, Gianpietro Del Piero. Strain localization in open-cell polyurethane foams: experiments and theoretical model. Journal of Mechanics of Materials and Structures, Mathematical Sciences Publishers, 2008, 3 (5), pp.969-981. <hal-00462199>

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