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Testing of auxetic materials using Hopkinson bar and digital image correlation

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F18%3A00494233" target="_blank" >RIV/68378297:_____/18:00494233 - isvavai.cz</a>

  • Alternative codes found

    RIV/68407700:21260/18:00323188

  • Result on the web

    <a href="https://doi.org/10.1051/epjconf/201818302045" target="_blank" >https://doi.org/10.1051/epjconf/201818302045</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1051/epjconf/201818302045" target="_blank" >10.1051/epjconf/201818302045</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Testing of auxetic materials using Hopkinson bar and digital image correlation

  • Original language description

    In this paper, a split Hopkinson pressure bar (SHPB) was used for impact loading of an auxetic lattice (structure with negative Poisson's ratio) at a given strain-rate. High strength aluminum and polym.ethyl methacrylate bars instrumented with foil strain-gauges were used for compression of an additively manufactured missing-rib auxetic lattice. All experiments were observed using a high-speed camera with frame-rate set to approx. 135.000 fps. High-speed images were synchronized with the strain-gauge records. Dynamic equilibrium in the specimen was analyzed and optimized pulse-shaping was introduced in the selected experiments. Longitudinal and lateral in-plane displacement& and strains were evaluated using digital image correlation (DIC) technique. DIC results were compared with results obtained from strain-gauges and were found to be in good agreement Using DIC, it was possible to analyze in-plane strain distribution in the specimens and to evaluate strain dependent Poisson's ratio of the auxetic structure.

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • OECD FORD branch

    20501 - Materials engineering

Result continuities

  • Project

    <a href="/en/project/GA15-15480S" target="_blank" >GA15-15480S: Optimized auxetic structures for cellular metals filled with strain rate sensitive material for high velocity impacts</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2018

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    EPJ Web of Conferences

  • ISBN

    978-2-7598-9053-8

  • ISSN

    2100-014X

  • e-ISSN

  • Number of pages

    6

  • Pages from-to

  • Publisher name

    EDP Sciences

  • Place of publication

    Paris

  • Event location

    Arcachon

  • Event date

    Sep 9, 2018

  • Type of event by nationality

    WRD - Celosvětová akce

  • UT code for WoS article