Imperial College London
Alternate

John P. Dear FREng

Faculty of Engineering, Department of Mechanical Engineering

Professor of Mechanical Engineering
 
 
 
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Contact

 

j.dear Website

 
 
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Location

 

520City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Rolfe:2020:10.1016/j.ijlmm.2020.06.003,
author = {Rolfe, E and Quinn, R and Irven, G and Brick, D and Dear, JP and Arora, H},
doi = {10.1016/j.ijlmm.2020.06.003},
journal = {International Journal of Lightweight Materials and Manufacture},
pages = {387--402},
title = {Underwater blast loading of partially submerged sandwich composite materials in relation to air blast loading response},
url = {http://dx.doi.org/10.1016/j.ijlmm.2020.06.003},
volume = {3},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The research presented in this paper focusses on the underwater blast resilience of a hybrid composite sandwich panel, consisting of both glass-fibre and carbon-fibre. The hybrid fibres were selected to optimise strength and stiffness during blast loading by promoting fibre interactions. In the blast experiment, the aim was to capture full-field panel deflection during large-scale underwater blast using high-speed 3D Digital Image Correlation (DIC). The composite sandwich panel was partially submerged and subjected to a 1 kg PE7 charge at 1 m stand-off. The charge was aligned with the centre of the panel at a depth of 275 mm and mimicked the effect of a near-field subsurface mine. The DIC deflection data shows that the horizontal cross-section of the panel deforms in a parabolic shape until excessive deflection causes core shear cracking. The panel then forms the commonly observed “bathtub” deformation shape. DIC data highlighted the expected differences in initial conditions compared to air-blast experiments, including the pre-strains caused by the mass of water (hydrostatic pressure). Furthermore, water depth was shown to significantly influence panel deflection, strain and hence damage sustained under these conditions. Panel deformations and damage after blast was progressively more severe in regions deeper underwater, as pressures were higher and decayed slower compared to regions near the free surface.An identical hybrid composite sandwich panel was subjected to air blast; one panel underwent two 8 kg PE7 charges in succession at 8 m stand-off. DIC was also implemented to record the panel deformations during air blast. The air and underwater blast tests represent two different regimes of blast loading: one far-field in air and one near-field underwater. The difference in deflection development, caused by the differing fluid mediums and stand-off distances, is apparent from the full-field results. During underwater blast the panel underwent peak pres
AU  - Rolfe,E
AU  - Quinn,R
AU  - Irven,G
AU  - Brick,D
AU  - Dear,JP
AU  - Arora,H
DO  - 10.1016/j.ijlmm.2020.06.003
EP  - 402
PY  - 2020///
SN  - 2588-8404
SP  - 387
TI  - Underwater blast loading of partially submerged sandwich composite materials in relation to air blast loading response
T2  - International Journal of Lightweight Materials and Manufacture
UR  - http://dx.doi.org/10.1016/j.ijlmm.2020.06.003
UR  - https://www.sciencedirect.com/science/article/pii/S2588840420300408?via%3Dihub
UR  - http://hdl.handle.net/10044/1/80328
VL  - 3
ER  -
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