High strain-rate compressive testing of filling materials for inter-penetrating phase composites

0509991 - ÚTAM 2020 RIV CZ eng C - Conference Paper (international conference)
Doktor, T. - Fíla, T. - Zlámal, Petr - Kytýř, Daniel - Jiroušek, O.
High strain-rate compressive testing of filling materials for inter-penetrating phase composites.
Acta Polytechnica CTU Proceedings. Vol. 25. Praha: Czech Technical University in Prague, 2019 - (Kytýř, D.; Zlámal, P.; Doktor, T.), /2019/, s. 21-24. ISBN 978-80-01-06670-6.
[Youth Symposium on Experimental Solid Mechanics /17./. Telč (CZ), 06.06.2019-08.06.2019]
R&D Projects: GA MŠMT(CZ) EF16_019/0000766
Institutional support: RVO:68378297
Keywords : interpenetration phase composite * SHPB * impact protection filling materials * strain-rate sensitivity
OECD category: Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics
https://ojs.cvut.cz/ojs/index.php/APP/article/view/6015

In this study behavior of the selected types of filling material for the inter-penetrating phase composites was tested in compressive loading mode at low and high strain-rates. Three types of the filling material were tested, (i) ordnance gelatin, (ii) low expansion polyurethane foam, and (iii) polyurethane putty. To evaluate their impact energy absorption bulk samples of the selected materials were tested in compression loading mode at strain-rates 1000 s−1 to 4000 s−1. The high strain-rate compressive loading was provided by Split Hopkinson Pressure Bar (SHPB) which was equipped with PMMA bars to enable testing of cellular materials with low mechanical impedance. Based on the comparative measurement response to compression at both low and high strain-rates was analysed. The results show a significant strain-rate sensitivity of the ordnance gelatin and of the polyurethane putty, while strain-rate effect in the polyurethane foam was not observed.
Permanent Link: http://hdl.handle.net/11104/0300560