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    The mechanical properties of ionoplast interlayer material at high strain rates

    Access Status
    Fulltext not available
    Authors
    Zhang, X.
    Shi, Y.
    Hao, Hong
    Cui, J.
    Date
    2015
    Type
    Journal Article
    
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    Citation
    Zhang, X. and Shi, Y. and Hao, H. and Cui, J. 2015. The mechanical properties of ionoplast interlayer material at high strain rates. Materials and Design. 83: pp. 387-399.
    Source Title
    Materials and Design
    DOI
    10.1016/j.matdes.2015.06.076
    ISSN
    0264-1275
    School
    Department of Civil Engineering
    URI
    http://hdl.handle.net/20.500.11937/41976
    Collection
    • Curtin Research Publications
    Abstract

    Ionoplast material has been recently introduced and extensively used as interlayer material for laminated glass to improve its post-glass breakage behavior. Due to its sound mechanical performance, the applications of laminated glass with ionoplast interlayer have been widely extended to the protection of glass structures against extreme loads such as shock and impact. The properties of this material at high strain rates are therefore needed for properly analysis and design of such structures. In this study, the mechanical properties of ionoplast material are studied experimentally through direct tensile tests over a wide strain rate range. The low-speed tests are performed using a conventional hydraulic machine at strain rates from 0.0056 s−1 to 0.556 s−1. The high strain-rate tests are carried out with a high-speed servo-hydraulic testing machine at strain rates from approximately 10 s−1 to 2000 s−1. It is found that the ionoplast material virtually exhibits elasto-plastic material properties in the strain rate range tested in this study. The testing results show that the material behavior is very strain-rate dependent.The yield strength increases with strain rate, but the material becomes more brittle with the increase in strain rate, with the ultimate strains over 400% under quasi-static loading, and decreasing to less than 200% at strain rate around 2000 s−1. The testing results indicate that simply applying the static material properties in predicting the structure responses of laminated glass with ionoplast interlayer subjected to blast and impact loads will substantially overestimate the ductility of the material and lead to inaccurate predictions of structure response. The testing results obtained in the current study together with available testing data in the literature are summarized and used to formulate the dynamic stress–strain curves of ionoplast material at various strain rates, which can be used in analysis and design of structures with ionoplast material subjected to blast and impact loads.

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