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Failure analysis using X-ray computed tomography of composite sandwich panels subjected to full-scale blast loading

Emily Rolfe, Mark Kelly, Hari Arora Orcid Logo, Paul A. Hooper, John P. Dear

Composites Part B: Engineering, Volume: 129, Pages: 26 - 40

Swansea University Author: Hari Arora Orcid Logo

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DOI (Published version): 10.1016/j.compositesb.2017.07.022

Abstract

The tailorable mechanical properties and high strength-to-weight ratios of composite sandwich panels make them of interest to the commercial marine and naval sector, however, further investigation into their blast resilience is required. The experiments performed in this study aimed to identify whet...

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Published in: Composites Part B: Engineering
ISSN: 1359-8368
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa37122
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first_indexed 2017-11-28T20:12:56Z
last_indexed 2019-03-26T12:03:59Z
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spelling 2019-03-23T21:19:50.0792746 v2 37122 2017-11-28 Failure analysis using X-ray computed tomography of composite sandwich panels subjected to full-scale blast loading ed7371c768e9746008a6807f9f7a1555 0000-0002-9790-0907 Hari Arora Hari Arora true false 2017-11-28 MEDE The tailorable mechanical properties and high strength-to-weight ratios of composite sandwich panels make them of interest to the commercial marine and naval sector, however, further investigation into their blast resilience is required. The experiments performed in this study aimed to identify whether alterations to the composite skins or core of a sandwich panel can yield improved blast resilience both in air and underwater. Underwater blast loads using 1.28 kg TNT equivalent charge at a stand-off distance of 1 m were performed on four different composite sandwich panels. Results revealed that implementing a stepwise graded density foam core, with increasing density away from the blast, reduces the deflection of the panel and damage sustained. Furthermore, the skin material affects the extent of panel deflection and damage, the lower strain to failure of carbon-fibre reinforced polymer (CFRP) skins reduces deflection but increases skin debonding. A further two panels were subjected to a 100 kg TNT air blast loading at a 15 m stand-off to compare the effect of a graded density core and the results support the underwater blast results. Future modelling of these experiments will aid the design process and should aim to include material damage mechanisms to identify the most suitable skins. Journal Article Composites Part B: Engineering 129 26 40 1359-8368 Carbon fibre, Glass fibres, Damage tolerance, Blast loading 15 11 2017 2017-11-15 10.1016/j.compositesb.2017.07.022 COLLEGE NANME Biomedical Engineering COLLEGE CODE MEDE Swansea University 2019-03-23T21:19:50.0792746 2017-11-28T13:30:19.1910736 Emily Rolfe 1 Mark Kelly 2 Hari Arora 0000-0002-9790-0907 3 Paul A. Hooper 4 John P. Dear 5 0037122-28112017133234.pdf rolfe2017.pdf 2017-11-28T13:32:34.5730000 Output 7120405 application/pdf Version of Record true 2017-11-28T00:00:00.0000000 false eng
title Failure analysis using X-ray computed tomography of composite sandwich panels subjected to full-scale blast loading
spellingShingle Failure analysis using X-ray computed tomography of composite sandwich panels subjected to full-scale blast loading
Hari Arora
title_short Failure analysis using X-ray computed tomography of composite sandwich panels subjected to full-scale blast loading
title_full Failure analysis using X-ray computed tomography of composite sandwich panels subjected to full-scale blast loading
title_fullStr Failure analysis using X-ray computed tomography of composite sandwich panels subjected to full-scale blast loading
title_full_unstemmed Failure analysis using X-ray computed tomography of composite sandwich panels subjected to full-scale blast loading
title_sort Failure analysis using X-ray computed tomography of composite sandwich panels subjected to full-scale blast loading
author_id_str_mv ed7371c768e9746008a6807f9f7a1555
author_id_fullname_str_mv ed7371c768e9746008a6807f9f7a1555_***_Hari Arora
author Hari Arora
author2 Emily Rolfe
Mark Kelly
Hari Arora
Paul A. Hooper
John P. Dear
format Journal article
container_title Composites Part B: Engineering
container_volume 129
container_start_page 26
publishDate 2017
institution Swansea University
issn 1359-8368
doi_str_mv 10.1016/j.compositesb.2017.07.022
document_store_str 1
active_str 0
description The tailorable mechanical properties and high strength-to-weight ratios of composite sandwich panels make them of interest to the commercial marine and naval sector, however, further investigation into their blast resilience is required. The experiments performed in this study aimed to identify whether alterations to the composite skins or core of a sandwich panel can yield improved blast resilience both in air and underwater. Underwater blast loads using 1.28 kg TNT equivalent charge at a stand-off distance of 1 m were performed on four different composite sandwich panels. Results revealed that implementing a stepwise graded density foam core, with increasing density away from the blast, reduces the deflection of the panel and damage sustained. Furthermore, the skin material affects the extent of panel deflection and damage, the lower strain to failure of carbon-fibre reinforced polymer (CFRP) skins reduces deflection but increases skin debonding. A further two panels were subjected to a 100 kg TNT air blast loading at a 15 m stand-off to compare the effect of a graded density core and the results support the underwater blast results. Future modelling of these experiments will aid the design process and should aim to include material damage mechanisms to identify the most suitable skins.
published_date 2017-11-15T03:46:38Z
_version_ 1763752226085404672
score 11.017797

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