Karagiozova, D., Langdon, G.S. orcid.org/0000-0002-0396-9787, Nurick, G.N. et al. (1 more author) (2016) The influence of a low density foam sandwich core on the response of a partially confined steel cylinder to internal air-blast. International Journal of Impact Engineering, 92. pp. 32-49. ISSN 0734-743X
Abstract
This article presents the results of an investigation into the response of partially confined hollow stainless steel cylinders to internal air-blast loading. Numerical, theoretical and experimental analyses were performed to gain insight into the factors governing the deformation processes. Numerically, LS-DYNA was used to simulate the response of the steel single-walled cylinders and compare it to the response of various equivalent mass sandwich-walled cylinders with different mass distributions through the wall thickness. It was established that sandwich-walled cylinders with low density foam core outperform the single-walled cylinder while the higher density foam core sandwich-walled cylinders respond by larger maximum deflections compared to the single-walled equivalent. A theoretical model was developed for the deformation of a sandwich-walled ring configuration and used to analyse and interpret the process of the dynamic foam compaction and stress transmission to the outer wall of a sandwich-walled cylinder. The results from the numerical parametric study and theoretical analysis are used further to design a sandwich-walled cylinder which would outperform the equivalent mass single-walled steel tube. Experimentally, the blast loading was generated by detonating spheres of plastic explosive at the mid-point of the centre line of the cylinders. Partial confinement was created by closing one end of the cylinder and leaving the other end free to vent to air.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015 Elsevier Ltd. |
Keywords: | Blast loading; Confined explosions; Sandwich-walled cylinder; Foam compaction; Transmitted force |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 20 Apr 2020 13:35 |
Last Modified: | 20 Apr 2020 13:35 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.ijimpeng.2015.09.010 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:159685 |