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Nonclassical cosserat bending deformation of foams via holographic interferometry

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Abstract

Nonclassical bending deformation in two foams was investigated using holographic interferometry. Sigmoid bulge deformation of the lateral surface of square cross-sectional bars was observed. Cosserat elastic constants inferred are consistent with values obtained via size effect experiments for dense polyurethane foam. For open cell copper foam, both bulge measurements and size effects implied a large Cosserat characteristic length and a large coupling number. Limitations of the available fourth-order bending analysis were encountered in this regime of strong effects.

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  1. University of Wisconsin, Madison, USA

    R. S. Lakes

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Lakes, R.S. Nonclassical cosserat bending deformation of foams via holographic interferometry. Z. Angew. Math. Phys. 74, 153 (2023). https://doi.org/10.1007/s00033-023-02046-1

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