TESTING OF HYBRID NICKEL-POLYURETHANE FOAMS AT HIGH STRAIN-RATES USING HOPKINSON BAR AND DIGITAL IMAGE CORRELATION
DOI:
https://doi.org/10.14311/APP.2018.18.0072Keywords:
SHPB, hybrid foam, DIC, strain-gauge measurementAbstract
In this paper Split Hopkinson pressure bar (SHPB) was used for dynamic testing of nickel coated polyurethane hybrid foams. The foams were manufactured by electrodeposition of a nickel coating on the standard open-cell polyurethane foam. High strength aluminium alloy bars instrumented with foil strain-gauges were used for dynamic loading of the specimens. Experiments were observed using a high-speed camera with frame-rate set to approx. 100-150 kfps. Precise synchronisation of the high-speed camera and the strain-gauge record was achieved using a through-beam photoelectric sensor. Dynamic equilibrium in the specimen was achieved in all measurements. Digital image correlation technique (DIC) was used to evaluate in-plane displacements and deformations of the samples. Specimens of two different dimensions were tested to investigate the collapse of the foam structure under high-speed loading at the specific strain-rate and strain.Downloads
Download data is not yet available.
Downloads
Published
2018-10-23
How to Cite
Adorna, M., Zlámal, P., Fíla, T., Falta, J., Felten, M., Fries, M., & Jung, A. (2018). TESTING OF HYBRID NICKEL-POLYURETHANE FOAMS AT HIGH STRAIN-RATES USING HOPKINSON BAR AND DIGITAL IMAGE CORRELATION. Acta Polytechnica CTU Proceedings, 18, 72–76. https://doi.org/10.14311/APP.2018.18.0072
Issue
Section
Articles