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doi:10.22028/D291-38355
Titel: | Dynamic impact testing of cellular solids and lattice structures : Application of two-sided direct impact Hopkinson bar |
VerfasserIn: | Fíla, Tomáš Koudelka, Petr Falta, Jan Zlámal, Petr Rada, Václav Adorna, Marcel Bronder, Stefan Jiroušek, Ondřej |
Sprache: | Englisch |
Titel: | International Journal of Impact Engineering |
Bandnummer: | 148 (2021) |
Verlag/Plattform: | Elsevier |
Erscheinungsjahr: | 2020 |
Freie Schlagwörter: | Direct impact Hopkinson bar Cellular solid Auxetic metamaterials Digital image correlation Wave separation |
DDC-Sachgruppe: | 500 Naturwissenschaften |
Dokumenttyp: | Journalartikel / Zeitschriftenartikel |
Abstract: | Direct impact testing with a Hopkinson bar is, nowadays, a very popular experimental technique for investigating the behavior of cellular materials, e.g., lattice metamaterials, at high strain-rates as it overcomes several limitations of the conventional Split Hopkinson Pressure Bar (SHPB). However, standard direct impact Hopkinson bars (DIHB) have only single-sided instrumentation complicating the analysis. In this paper, a DIHB apparatus instrumented with conventional strain-gauges on both bars (a so called Open Hopkinson Pressure Bar - OHPB) is used for dynamic impact experiments of cellular materials. Digital image correlation (DIC) is used as a tool for investigating the displacements and velocities at the faces of the bars. A straight-forward wave separation technique combining the data from the strain-gauges with the DIC is adopted to increase the experiment time window multiple times. The experimental method is successfully tested at impact velocities in a range of 5 − 30 m⋅s− 1 with both linear elastic and visco-elastic bars of a medium diameter. It is shown that, under certain circumstances, a simple linear elastic model is sufficient for the evaluation of the measurements with the viscoelastic bars, while no additional attenuation and phase-shift corrections are necessary. The applicability of the experimental method is demonstrated on various experiments with conventional metal foams, hybrid foams, and additively manufactured auxetic lattices subjected to dynamic compression. |
DOI der Erstveröffentlichung: | 10.1016/j.ijimpeng.2020.103767 |
URL der Erstveröffentlichung: | http://dx.doi.org/10.1016/j.ijimpeng.2020.103767 |
Link zu diesem Datensatz: | urn:nbn:de:bsz:291--ds-383555 hdl:20.500.11880/34603 http://dx.doi.org/10.22028/D291-38355 |
ISSN: | 0734-743X |
Datum des Eintrags: | 2-Dez-2022 |
Bezeichnung des in Beziehung stehenden Objekts: | Supplementary material |
In Beziehung stehendes Objekt: | https://ars.els-cdn.com/content/image/1-s2.0-S0734743X2030837X-mmc1.zip |
Fakultät: | NT - Naturwissenschaftlich- Technische Fakultät |
Fachrichtung: | NT - Materialwissenschaft und Werkstofftechnik |
Professur: | NT - Keiner Professur zugeordnet |
Sammlung: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
Dateien zu diesem Datensatz:
Datei | Beschreibung | Größe | Format | |
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1-s2.0-S0734743X2030837X-main.pdf | 10,91 MB | Adobe PDF | Öffnen/Anzeigen |
Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons