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    Influence of strain rate on the piezoresistive behavior of conductive polyamide composites

    Access Status
    Fulltext not available
    Authors
    Zhang, M.
    Chen, J.
    Lu, Chunsheng
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Zhang, M. and Chen, J. and Lu, C. 2016. Influence of strain rate on the piezoresistive behavior of conductive polyamide composites. Composites Science and Technology. 133: pp. 1-6.
    Source Title
    Composites Science and Technology
    DOI
    10.1016/j.compscitech.2016.07.010
    ISSN
    0266-3538
    School
    Department of Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/48087
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 Elsevier Ltd. Due to the matrix viscosity, polyamide composites take on the obvious strain rate sensitivity that affects their conductivities during compression. In this paper, the influence of strain rate on the piezoresistive behavior of polyamide filled by stainless steel fibers and carbon nanotubes (SSFs/CNTs/PA6) is investigated. Based on experimental observations under compression, the resistivity of SSFs/CNTs/PA6 composites is dominated by two kinds of competing mechanisms: the spacing decrease between conductive fillers induced by compressive strain and the spacing increase due to micro-damage. A piezoresistivity model is proposed, which is coupled with the strain rate effect of SSFs/CNTs/PA6 composites. It is shown that there is a power-law relationship between the tunneling barrier and strain rate.

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