Characterisation of dynamic behaviour of alumina ceramics: evaluation of stress uniformity

Wang, Z. and Li, P. (2015) Characterisation of dynamic behaviour of alumina ceramics: evaluation of stress uniformity. AIP Advances, 5(10), 107224. (doi:10.1063/1.4934793)

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Abstract

Accurate characterisation of dynamic behaviour of ceramics requires the reliable split-Hopkinson pressure bar (SHPB) technique and the condition of uniaxial homogeneous specimen deformation. In this study, an experimentally validated 3D finite element model of the full scale SHPB experiment was developed to quantitatively evaluate the wave propagation in the bars and the stress distribution/evolution in the alumina specimen. Wave signals in both the SHPB experiments and the finite element model were analysed to characterise the dynamic behaviour of alumina. It was found that the equilibrium of both stresses within the specimen and forces at the specimen ends can be established in the intermediate stage of deformation. The validity of stress uniformity in the alumina specimen supports the assumption of uniaxial homogeneous specimen deformation in the SHPB and validates the characterisation of dynamic behaviour of alumina ceramics.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Li, Dr Peifeng
Authors: Wang, Z., and Li, P.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:AIP Advances
Publisher:American Institute of Physics
ISSN:2158-3226
ISSN (Online):2158-3226
Published Online:23 October 2015
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in AIP Advances 5(10): 107224
Publisher Policy:Reproduced under a Creative Commons license

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