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Flores-Johnson, E. A. and Li, Q. M. and Mines, R. A. W. (2008) Degradation of Elastic Modulus of Progressively-Crushable Foams in Uniaxial Compression. Journal of Cellular Plastics, 44 (5). pp. 415-434. ISSN 1530-7999

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    The degradation of apparent modulus in progressively-crushable foams in uniaxial compression is studied in the present paper based on an analysis of the measurement of engineering strain. It shows that the deformation mechanism of the progressive collapse of the foam causes the non-uniform deformation in the foam during uniaxial compression, which leads to the decrease of apparent elastic modulus with the increase of strain in the plateau stress regime. Theoretical predictions are compared with experimental results for different closed-cell polymeric foams with satisfactory agreement. It is also shown that this method is not applicable to the in-plane compression of honeycombs and the numerical modelling based on macroscopic constitutive equation is incapable of predicting the degradation of apparent modulus in progressively-crushable foams.

    Item Type: Article
    Uncontrolled Keywords: Strain measurement, crushable foam, degradation of apparent elastic modulus
    Subjects: Engineering
    Divisions: UNSPECIFIED
    Depositing User: Mr Emmanuel Flores
    Date Deposited: 18 Nov 2009 18:22
    Last Modified: 23 Aug 2010 14:26
    URI: http://opendepot.org/id/eprint/217

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