Characterisation of dynamic behaviour of alumina ceramics: evaluation of stress uniformity
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 deve...
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Online Access: | http://dx.doi.org/10.1063/1.4934793 |
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doaj-d4b93de23a80481b8de6a965e481f4f92020-11-25T00:21:07ZengAIP Publishing LLCAIP Advances2158-32262015-10-01510107224107224-1610.1063/1.4934793059510ADVCharacterisation of dynamic behaviour of alumina ceramics: evaluation of stress uniformityZhiyong Wang0Peifeng Li1School of Mechanical and Aerospace Engineering, Nanyang Technological University, SingaporeSchool of Mechanical and Aerospace Engineering, Nanyang Technological University, SingaporeAccurate 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.http://dx.doi.org/10.1063/1.4934793 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhiyong Wang Peifeng Li |
spellingShingle |
Zhiyong Wang Peifeng Li Characterisation of dynamic behaviour of alumina ceramics: evaluation of stress uniformity AIP Advances |
author_facet |
Zhiyong Wang Peifeng Li |
author_sort |
Zhiyong Wang |
title |
Characterisation of dynamic behaviour of alumina ceramics: evaluation of stress uniformity |
title_short |
Characterisation of dynamic behaviour of alumina ceramics: evaluation of stress uniformity |
title_full |
Characterisation of dynamic behaviour of alumina ceramics: evaluation of stress uniformity |
title_fullStr |
Characterisation of dynamic behaviour of alumina ceramics: evaluation of stress uniformity |
title_full_unstemmed |
Characterisation of dynamic behaviour of alumina ceramics: evaluation of stress uniformity |
title_sort |
characterisation of dynamic behaviour of alumina ceramics: evaluation of stress uniformity |
publisher |
AIP Publishing LLC |
series |
AIP Advances |
issn |
2158-3226 |
publishDate |
2015-10-01 |
description |
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. |
url |
http://dx.doi.org/10.1063/1.4934793 |
work_keys_str_mv |
AT zhiyongwang characterisationofdynamicbehaviourofaluminaceramicsevaluationofstressuniformity AT peifengli characterisationofdynamicbehaviourofaluminaceramicsevaluationofstressuniformity |
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