Imperial College London

Professor Gareth Collins

Faculty of EngineeringDepartment of Earth Science & Engineering

Professor of Planetary Science
 
 
 
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Contact

 

+44 (0)20 7594 1518g.collins Website

 
 
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Location

 

4.83Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Derrick:2018:1361-651X/aaab7e,
author = {Derrick, J and LaJeunesse, J and Davison, T and Collins, G and Borg, J},
doi = {1361-651X/aaab7e},
journal = {Modelling and Simulation in Materials Science and Engineering},
title = {Mesoscale simulations of shock compaction of a granular ceramic: effects of mesostructure and mixed-cell strength treatment},
url = {http://dx.doi.org/10.1088/1361-651X/aaab7e},
volume = {26},
year = {2018}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - The shock response of granular materials is important in a variety of contexts but the precise dynamics of grains during compaction is poorly understood. Here we use 2D mesoscale numerical simulations of the shock compaction of granular tungsten carbide to investigate the effect of internal structure within the particle bed and ’stiction’ between grains on the shock response. An increase in the average number of contactswith other particles, per particle, tends to shift the Hugoniot to higher shock velocities, lower particle velocities and lower densities. This shift is sensitive to inter-particle shear resistance. Eulerian shock physics codes approximate friction between, and interlocking of, grains with their treatment of mixed cell strength (stiction) and here we show thatthis has a significant effect on the shock response. When studying the compaction of particle beds it is not common to quantify the pre-compaction internal structure, yet our results suggest that such differences should be taken into account, either by usingidentical beds or by averaging results over multiple experiments.
AU - Derrick,J
AU - LaJeunesse,J
AU - Davison,T
AU - Collins,G
AU - Borg,J
DO - 1361-651X/aaab7e
PY - 2018///
SN - 0965-0393
TI - Mesoscale simulations of shock compaction of a granular ceramic: effects of mesostructure and mixed-cell strength treatment
T2 - Modelling and Simulation in Materials Science and Engineering
UR - http://dx.doi.org/10.1088/1361-651X/aaab7e
UR - http://hdl.handle.net/10044/1/56299
VL - 26
ER -