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Compressive strength after blast of sandwich composite materials

Hari Arora Orcid Logo, M. Kelly, A. Worley, P. Del Linz, A. Fergusson, P. A. Hooper, J. P. Dear

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Volume: 372, Issue: 2015, Pages: 20130212 - 20130212

Swansea University Author: Hari Arora Orcid Logo

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DOI (Published version): 10.1098/rsta.2013.0212

Abstract

Composite sandwich materials have yet to be widely adopted in the construction of naval vessels despite their excellent strength-to-weight ratio and low radar return. One barrier to their wider use is our limited understanding of their performance when subjected to air blast. This paper focuses on t...

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Published in: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
ISSN: 1364-503X 1471-2962
Published: The Royal Society 2014
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URI: https://cronfa.swan.ac.uk/Record/cronfa37201
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spelling 2020-12-15T10:34:56.3217336 v2 37201 2017-11-28 Compressive strength after blast of sandwich composite materials ed7371c768e9746008a6807f9f7a1555 0000-0002-9790-0907 Hari Arora Hari Arora true false 2017-11-28 MEDE Composite sandwich materials have yet to be widely adopted in the construction of naval vessels despite their excellent strength-to-weight ratio and low radar return. One barrier to their wider use is our limited understanding of their performance when subjected to air blast. This paper focuses on this problem and specifically the strength remaining after damage caused during an explosion. Carbon-fibre-reinforced polymer (CFRP) composite skins on a styrene–acrylonitrile (SAN) polymer closed-cell foam core are the primary composite system evaluated. Glass-fibre-reinforced polymer (GFRP) composite skins were also included for comparison in a comparable sandwich configuration. Full-scale blast experiments were conducted, where 1.6×1.3 m sized panels were subjected to blast of a Hopkinson–Cranz scaled distance of 3.02 m kg−1/3, 100 kg TNT equivalent at a stand-off distance of 14 m. This explosive blast represents a surface blast threat, where the shockwave propagates in air towards the naval vessel. Hopkinson was the first to investigate the characteristics of this explosive air-blast pulse (Hopkinson 1948 Proc. R. Soc. Lond. A 89, 411–413 (doi:10.1098/rspa.1914.0008)). Further analysis is provided on the performance of the CFRP sandwich panel relative to the GFRP sandwich panel when subjected to blast loading through use of high-speed speckle strain mapping. After the blast events, the residual compressive load-bearing capacity is investigated experimentally, using appropriate loading conditions that an in-service vessel may have to sustain. Residual strength testing is well established for post-impact ballistic assessment, but there has been less research performed on the residual strength of sandwich composites after blast. Journal Article Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372 2015 20130212 20130212 The Royal Society 1364-503X 1471-2962 blast, composites, sandwich materials, compression after impact 13 5 2014 2014-05-13 10.1098/rsta.2013.0212 http://dx.doi.org/10.1098/rsta.2013.0212 COLLEGE NANME Biomedical Engineering COLLEGE CODE MEDE Swansea University 2020-12-15T10:34:56.3217336 2017-11-28T14:22:52.8465407 Hari Arora 0000-0002-9790-0907 1 M. Kelly 2 A. Worley 3 P. Del Linz 4 A. Fergusson 5 P. A. Hooper 6 J. P. Dear 7 37201__7233__5a3cbad5ecc640fca2130ebe71895e05.pdf arora2014.pdf 2017-11-28T14:25:20.9130000 Output 3211728 application/pdf Version of Record true 2017-11-28T00:00:00.0000000 false eng
title Compressive strength after blast of sandwich composite materials
spellingShingle Compressive strength after blast of sandwich composite materials
Hari Arora
title_short Compressive strength after blast of sandwich composite materials
title_full Compressive strength after blast of sandwich composite materials
title_fullStr Compressive strength after blast of sandwich composite materials
title_full_unstemmed Compressive strength after blast of sandwich composite materials
title_sort Compressive strength after blast of sandwich composite materials
author_id_str_mv ed7371c768e9746008a6807f9f7a1555
author_id_fullname_str_mv ed7371c768e9746008a6807f9f7a1555_***_Hari Arora
author Hari Arora
author2 Hari Arora
M. Kelly
A. Worley
P. Del Linz
A. Fergusson
P. A. Hooper
J. P. Dear
format Journal article
container_title Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
container_volume 372
container_issue 2015
container_start_page 20130212
publishDate 2014
institution Swansea University
issn 1364-503X
1471-2962
doi_str_mv 10.1098/rsta.2013.0212
publisher The Royal Society
url http://dx.doi.org/10.1098/rsta.2013.0212
document_store_str 1
active_str 0
description Composite sandwich materials have yet to be widely adopted in the construction of naval vessels despite their excellent strength-to-weight ratio and low radar return. One barrier to their wider use is our limited understanding of their performance when subjected to air blast. This paper focuses on this problem and specifically the strength remaining after damage caused during an explosion. Carbon-fibre-reinforced polymer (CFRP) composite skins on a styrene–acrylonitrile (SAN) polymer closed-cell foam core are the primary composite system evaluated. Glass-fibre-reinforced polymer (GFRP) composite skins were also included for comparison in a comparable sandwich configuration. Full-scale blast experiments were conducted, where 1.6×1.3 m sized panels were subjected to blast of a Hopkinson–Cranz scaled distance of 3.02 m kg−1/3, 100 kg TNT equivalent at a stand-off distance of 14 m. This explosive blast represents a surface blast threat, where the shockwave propagates in air towards the naval vessel. Hopkinson was the first to investigate the characteristics of this explosive air-blast pulse (Hopkinson 1948 Proc. R. Soc. Lond. A 89, 411–413 (doi:10.1098/rspa.1914.0008)). Further analysis is provided on the performance of the CFRP sandwich panel relative to the GFRP sandwich panel when subjected to blast loading through use of high-speed speckle strain mapping. After the blast events, the residual compressive load-bearing capacity is investigated experimentally, using appropriate loading conditions that an in-service vessel may have to sustain. Residual strength testing is well established for post-impact ballistic assessment, but there has been less research performed on the residual strength of sandwich composites after blast.
published_date 2014-05-13T03:50:36Z
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