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Non-linear properties of polymer cellular materials with a negative Poisson's ratio

Abstract

Negative Poisson's ratio polymeric cellular solids (re-entrant foams) were studied to ascertain the optimal processing procedures which give rise to the smallest value of Poisson's ratio. The non-linear stress-strain relationship was determined for both conventional and re-entrant foams; it depended upon the permanent volumetric compression achieved during the processing procedure. Poisson's ratio of re-entrant foam measured as a function of strain was found to have a relative minimum at small strains. The toughness of re-entrant foam increased with permanent volumetric compression, and hence with density.

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Author information Authors and Affiliations
  1. Department of Mechanical Engineering, University of Iowa, 52242, Iowa City, IA, USA

    J. B. Choi & R. S. Lakes

  2. Department of Biomedical Engineering, and Center for Laser Science and Engineering, University of Iowa, 52242, Iowa City, IA, USA

    J. B. Choi

Authors
  1. J. B. Choi
  2. R. S. Lakes
About this article Cite this article

Choi, J.B., Lakes, R.S. Non-linear properties of polymer cellular materials with a negative Poisson's ratio. J Mater Sci 27, 4678–4684 (1992). https://doi.org/10.1007/BF01166005

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