Sandwich Panels with Polymeric Foam Cores Exposed to Blast Loading: An Experimental and Numerical Investigation
Sandwich panels have proven to be excellent energy absorbents. Such panels may be used as a protective structure in, for example, façades subjected to explosions. In this study, the dynamic response of sandwich structures subjected to blast loading has been investigated both experimentally and numer...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/24/9061 |
| _version_ | 1797544249094307840 |
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| author | Kristoffer Aune Brekken Aase Reyes Torodd Berstad Magnus Langseth Tore Børvik |
| author_facet | Kristoffer Aune Brekken Aase Reyes Torodd Berstad Magnus Langseth Tore Børvik |
| author_sort | Kristoffer Aune Brekken |
| collection | DOAJ |
| description | Sandwich panels have proven to be excellent energy absorbents. Such panels may be used as a protective structure in, for example, façades subjected to explosions. In this study, the dynamic response of sandwich structures subjected to blast loading has been investigated both experimentally and numerically, utilizing a shock tube facility. Sandwich panels made of aluminium skins and a core of extruded polystyrene (XPS) with different densities were subjected to various blast load intensities. Low-velocity impact tests on XPS samples were also conducted for validation and calibration of a viscoplastic extension of the Deshpande-Fleck crushable foam model. The experimental results revealed a significant increase in blast load mitigation for sandwich panels compared to skins without a foam core, and that the back-skin deformation and the core compression correlated with the foam density. Numerical models of the shock tube tests were created using LS-DYNA, incorporating the new viscoplastic formulation of the foam material. The numerical models were able to capture the trends observed in the experimental tests, and good quantitative agreement between the experimental and predicted responses was in general obtained. One aim of this study is to provide high-precision experimental data, combined with a validated numerical modelling strategy, that can be used in simulation-based optimisation of sandwich panels exposed to blast loading. |
| first_indexed | 2024-03-10T13:56:49Z |
| format | Article |
| id | doaj.art-0d270eca79994b11abd33ba87f2f4bdb |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T13:56:49Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-0d270eca79994b11abd33ba87f2f4bdb2023-11-21T01:28:35ZengMDPI AGApplied Sciences2076-34172020-12-011024906110.3390/app10249061Sandwich Panels with Polymeric Foam Cores Exposed to Blast Loading: An Experimental and Numerical InvestigationKristoffer Aune Brekken0Aase Reyes1Torodd Berstad2Magnus Langseth3Tore Børvik4Structural Impact Laboratory (SIMLab), Department of Structural Engineering, NTNU—Norwegian University of Science and Technology, 7491 Trondheim, NorwayStructural Impact Laboratory (SIMLab), Department of Structural Engineering, NTNU—Norwegian University of Science and Technology, 7491 Trondheim, NorwayStructural Impact Laboratory (SIMLab), Department of Structural Engineering, NTNU—Norwegian University of Science and Technology, 7491 Trondheim, NorwayStructural Impact Laboratory (SIMLab), Department of Structural Engineering, NTNU—Norwegian University of Science and Technology, 7491 Trondheim, NorwayStructural Impact Laboratory (SIMLab), Department of Structural Engineering, NTNU—Norwegian University of Science and Technology, 7491 Trondheim, NorwaySandwich panels have proven to be excellent energy absorbents. Such panels may be used as a protective structure in, for example, façades subjected to explosions. In this study, the dynamic response of sandwich structures subjected to blast loading has been investigated both experimentally and numerically, utilizing a shock tube facility. Sandwich panels made of aluminium skins and a core of extruded polystyrene (XPS) with different densities were subjected to various blast load intensities. Low-velocity impact tests on XPS samples were also conducted for validation and calibration of a viscoplastic extension of the Deshpande-Fleck crushable foam model. The experimental results revealed a significant increase in blast load mitigation for sandwich panels compared to skins without a foam core, and that the back-skin deformation and the core compression correlated with the foam density. Numerical models of the shock tube tests were created using LS-DYNA, incorporating the new viscoplastic formulation of the foam material. The numerical models were able to capture the trends observed in the experimental tests, and good quantitative agreement between the experimental and predicted responses was in general obtained. One aim of this study is to provide high-precision experimental data, combined with a validated numerical modelling strategy, that can be used in simulation-based optimisation of sandwich panels exposed to blast loading.https://www.mdpi.com/2076-3417/10/24/9061blast mitigationsandwich panelsextruded polystyrene (XPS)aluminium alloy AA1050-H14shock tube testsLS-DYNA |
| spellingShingle | Kristoffer Aune Brekken Aase Reyes Torodd Berstad Magnus Langseth Tore Børvik Sandwich Panels with Polymeric Foam Cores Exposed to Blast Loading: An Experimental and Numerical Investigation Applied Sciences blast mitigation sandwich panels extruded polystyrene (XPS) aluminium alloy AA1050-H14 shock tube tests LS-DYNA |
| title | Sandwich Panels with Polymeric Foam Cores Exposed to Blast Loading: An Experimental and Numerical Investigation |
| title_full | Sandwich Panels with Polymeric Foam Cores Exposed to Blast Loading: An Experimental and Numerical Investigation |
| title_fullStr | Sandwich Panels with Polymeric Foam Cores Exposed to Blast Loading: An Experimental and Numerical Investigation |
| title_full_unstemmed | Sandwich Panels with Polymeric Foam Cores Exposed to Blast Loading: An Experimental and Numerical Investigation |
| title_short | Sandwich Panels with Polymeric Foam Cores Exposed to Blast Loading: An Experimental and Numerical Investigation |
| title_sort | sandwich panels with polymeric foam cores exposed to blast loading an experimental and numerical investigation |
| topic | blast mitigation sandwich panels extruded polystyrene (XPS) aluminium alloy AA1050-H14 shock tube tests LS-DYNA |
| url | https://www.mdpi.com/2076-3417/10/24/9061 |
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