Numerical analysis of a testing technique to investigate the dynamic crack propagation in armour ceramic
Ceramic materials are numerically studied to understand their fracturing behaviour upon dynamic conditions and impact loadings. During a ballistic impact of a projectile against a ceramic armour system, an intense fragmentation composed of numerous oriented cracks, develops in the target. It is the...
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2018-01-01
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Series: | EPJ Web of Conferences |
Online Access: | https://doi.org/10.1051/epjconf/201818302039 |
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doaj-32b40481412b4de98bf227011d311d482021-08-02T10:22:04ZengEDP SciencesEPJ Web of Conferences2100-014X2018-01-011830203910.1051/epjconf/201818302039epjconf_dymat2018_02039Numerical analysis of a testing technique to investigate the dynamic crack propagation in armour ceramicDuplan YannickForquin PascalLukić BratislavSaletti DominiqueCeramic materials are numerically studied to understand their fracturing behaviour upon dynamic conditions and impact loadings. During a ballistic impact of a projectile against a ceramic armour system, an intense fragmentation composed of numerous oriented cracks, develops in the target. It is the reason why the conditions of crack initiation, propagation and arrest in these materials need to be investigated. In the present work, a dynamic testing configuration has been developed in order to characterise the dynamic fracture toughness (K1,d), considering a single crack that propagates from the specimen notch tip. The “Rockspall” testing technique, which employs a two-notch specimen loaded in a spalling experiment, was used. Thanks to the reflection of a compression wave into a tensile load from the sample free-end, a single dynamic crack is triggered. The sample geometry is optimised by means of a series of FE numerical simulations involving an anisotropic damage model.https://doi.org/10.1051/epjconf/201818302039 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Duplan Yannick Forquin Pascal Lukić Bratislav Saletti Dominique |
spellingShingle |
Duplan Yannick Forquin Pascal Lukić Bratislav Saletti Dominique Numerical analysis of a testing technique to investigate the dynamic crack propagation in armour ceramic EPJ Web of Conferences |
author_facet |
Duplan Yannick Forquin Pascal Lukić Bratislav Saletti Dominique |
author_sort |
Duplan Yannick |
title |
Numerical analysis of a testing technique to investigate the dynamic crack propagation in armour ceramic |
title_short |
Numerical analysis of a testing technique to investigate the dynamic crack propagation in armour ceramic |
title_full |
Numerical analysis of a testing technique to investigate the dynamic crack propagation in armour ceramic |
title_fullStr |
Numerical analysis of a testing technique to investigate the dynamic crack propagation in armour ceramic |
title_full_unstemmed |
Numerical analysis of a testing technique to investigate the dynamic crack propagation in armour ceramic |
title_sort |
numerical analysis of a testing technique to investigate the dynamic crack propagation in armour ceramic |
publisher |
EDP Sciences |
series |
EPJ Web of Conferences |
issn |
2100-014X |
publishDate |
2018-01-01 |
description |
Ceramic materials are numerically studied to understand their fracturing behaviour upon dynamic conditions and impact loadings. During a ballistic impact of a projectile against a ceramic armour system, an intense fragmentation composed of numerous oriented cracks, develops in the target. It is the reason why the conditions of crack initiation, propagation and arrest in these materials need to be investigated. In the present work, a dynamic testing configuration has been developed in order to characterise the dynamic fracture toughness (K1,d), considering a single crack that propagates from the specimen notch tip. The “Rockspall” testing technique, which employs a two-notch specimen loaded in a spalling experiment, was used. Thanks to the reflection of a compression wave into a tensile load from the sample free-end, a single dynamic crack is triggered. The sample geometry is optimised by means of a series of FE numerical simulations involving an anisotropic damage model. |
url |
https://doi.org/10.1051/epjconf/201818302039 |
work_keys_str_mv |
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