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Fabrication methods for auxetic foams

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Abstract

Auxetic materials have a negative Poisson's ratio, that is, they expand laterally when stretched longitudinally. Negative Poisson's ratio is an unusual property that affects many of the mechanical properties of the material, such as indentation resistance, compression, shear stiffness, and certain aspects of the dynamic performance. The unusual mechanical properties of auxetic foams are attributed to the deformation characteristics of re-entrant microstructures. One way of obtaining negative Poisson's ratio is by using a re-entrant cell structure. Auxetic foam was fabricated from a conventional polymeric foam. The fabrication method for making both small and large auxetic foam specimens is described.

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Authors and Affiliations

  1. Institute of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan, 70101

    N Chan

  2. School of Engineering, University of Exeter, Harrison Building, Exeter, EX4 4QF, UK

    K. E Evans

Authors
  1. N Chan
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  2. K. E Evans
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Chan, N., Evans, K.E. Fabrication methods for auxetic foams. Journal of Materials Science 32, 5945–5953 (1997). https://doi.org/10.1023/A:1018606926094

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  • DOI: https://doi.org/10.1023/A:1018606926094

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