e-space
Manchester Metropolitan University's Research Repository

    Fabrication, characterisation and analytical modelling of gradient auxetic closed cell foams

    Duncan, Oliver ORCID logoORCID: https://orcid.org/0000-0001-9503-1464, Alderson, Andrew and Allen, Thomas ORCID logoORCID: https://orcid.org/0000-0003-4910-9149 (2021) Fabrication, characterisation and analytical modelling of gradient auxetic closed cell foams. Smart Materials and Structures, 30 (3). 035014. ISSN 0964-1726

    [img]
    Preview
    Accepted Version
    Available under License Creative Commons Attribution Non-commercial No Derivatives.

    Download (4MB) | Preview

    Abstract

    Auxetic (negative Poisson’s ratio) and gradient open cell foams have shown promise for their conformability and high impact energy absorption – useful in applications like protective equipment, footwear and prosthetics. Recent methods fabricated closed cell auxetic foam by steaming conventional closed cell foam. Methods developed herein control the cell structure of auxetic closed cell foam, to produce novel intentionally anisotropic and gradient auxetic closed cell foam. Pins passed through the foam constrained or stretched regions during steaming to further modify cell structure and impart gradients in cell structure, Young’s modulus and Poisson’s ratios. Fabricated foams had Poisson’s ratios between 1 and -1. Imparted Young’s moduli of 1 to 12 MPa were similar to foams used in footwear, prosthesis, helmets and other impact protection. The effect of changes to cell structure on Young’s moduli and Poisson’s ratio are explained by combining analytical models of auxetic open cell and conventional closed cell foam.

    Impact and Reach

    Statistics

    Activity Overview
    6 month trend
    91Downloads
    6 month trend
    90Hits

    Additional statistics for this dataset are available via IRStats2.

    Altmetric

    Actions (login required)

    View Item View Item