TESTING OF HYBRID NICKEL-POLYURETHANE FOAMS AT HIGH STRAIN-RATES USING HOPKINSON BAR AND DIGITAL IMAGE CORRELATION
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 strai...
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| Format: | Article |
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CTU Central Library
2018-10-01
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| Series: | Acta Polytechnica CTU Proceedings |
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| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/5096 |
| _version_ | 1818494479909257216 |
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| author | Marcel Adorna Petr Zlámal Tomáš Fíla Jan Falta Markus Felten Michael Fries Anne Jung |
| author_facet | Marcel Adorna Petr Zlámal Tomáš Fíla Jan Falta Markus Felten Michael Fries Anne Jung |
| author_sort | Marcel Adorna |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-10T18:07:03Z |
| format | Article |
| id | doaj.art-2f18c70b74454d549d8ef8374872b39c |
| institution | Directory Open Access Journal |
| issn | 2336-5382 |
| language | English |
| last_indexed | 2024-12-10T18:07:03Z |
| publishDate | 2018-10-01 |
| publisher | CTU Central Library |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj.art-2f18c70b74454d549d8ef8374872b39c2022-12-22T01:38:35ZengCTU Central LibraryActa Polytechnica CTU Proceedings2336-53822018-10-01180727610.14311/APP.2018.18.00724246TESTING OF HYBRID NICKEL-POLYURETHANE FOAMS AT HIGH STRAIN-RATES USING HOPKINSON BAR AND DIGITAL IMAGE CORRELATIONMarcel Adorna0Petr Zlámal1Tomáš Fíla2Jan Falta3Markus Felten4Michael Fries5Anne Jung6Czech Technical University in Prague, Faculty of Transportation Sciences, Department of Mechanics and Materials, Konviktská 20, 120 00 Prague 1, Czech RepublicCzech Technical University in Prague, Faculty of Transportation Sciences, Department of Mechanics and Materials, Konviktská 20, 120 00 Prague 1, Czech RepublicCzech Technical University in Prague, Faculty of Transportation Sciences, Department of Mechanics and Materials, Konviktská 20, 120 00 Prague 1, Czech RepublicCzech Technical University in Prague, Faculty of Transportation Sciences, Department of Mechanics and Materials, Konviktská 20, 120 00 Prague 1, Czech RepublicUniversität des Saarlandes, Institute of Applied Mechanics, Campus A4.2, Saarbrücken, 66123, GermanyUniversität des Saarlandes, Institute of Applied Mechanics, Campus A4.2, Saarbrücken, 66123, GermanyUniversität des Saarlandes, Institute of Applied Mechanics, Campus A4.2, Saarbrücken, 66123, GermanyIn 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.https://ojs.cvut.cz/ojs/index.php/APP/article/view/5096SHPB, hybrid foam, DIC, strain-gauge measurement |
| spellingShingle | Marcel Adorna Petr Zlámal Tomáš Fíla Jan Falta Markus Felten Michael Fries Anne Jung TESTING OF HYBRID NICKEL-POLYURETHANE FOAMS AT HIGH STRAIN-RATES USING HOPKINSON BAR AND DIGITAL IMAGE CORRELATION Acta Polytechnica CTU Proceedings SHPB, hybrid foam, DIC, strain-gauge measurement |
| title | TESTING OF HYBRID NICKEL-POLYURETHANE FOAMS AT HIGH STRAIN-RATES USING HOPKINSON BAR AND DIGITAL IMAGE CORRELATION |
| title_full | TESTING OF HYBRID NICKEL-POLYURETHANE FOAMS AT HIGH STRAIN-RATES USING HOPKINSON BAR AND DIGITAL IMAGE CORRELATION |
| title_fullStr | TESTING OF HYBRID NICKEL-POLYURETHANE FOAMS AT HIGH STRAIN-RATES USING HOPKINSON BAR AND DIGITAL IMAGE CORRELATION |
| title_full_unstemmed | TESTING OF HYBRID NICKEL-POLYURETHANE FOAMS AT HIGH STRAIN-RATES USING HOPKINSON BAR AND DIGITAL IMAGE CORRELATION |
| title_short | TESTING OF HYBRID NICKEL-POLYURETHANE FOAMS AT HIGH STRAIN-RATES USING HOPKINSON BAR AND DIGITAL IMAGE CORRELATION |
| title_sort | testing of hybrid nickel polyurethane foams at high strain rates using hopkinson bar and digital image correlation |
| topic | SHPB, hybrid foam, DIC, strain-gauge measurement |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/5096 |
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