| Issue |
J. Phys. IV France
Volume 08, Number PR8, November 1998
2nd European Mechanics of Materials Conference on Mechanics of Materials with Intrinsic Length Scale : Physics, Experiments, Modelling and Applications
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|---|---|---|
| Page(s) | Pr8-119 - Pr8-126 | |
| DOI | https://doi.org/10.1051/jp4:1998815 | |
2nd European Mechanics of Materials Conference on Mechanics of Materials with Intrinsic Length Scale : Physics, Experiments, Modelling and Applications
J. Phys. IV France 08 (1998) Pr8-119-Pr8-126
DOI: 10.1051/jp4:1998815
1 DGA/CTA, Département Surfaces et Matériaux en Conditions Sévères, 16 bis avenue Prieur de la Côte d'Or, 94114 Arcueil cedex, France
2 ENS de Cachan, CNRS, Université Paris 6, 61 avenue du Président Wilson, 94235 Cachan cedex, France
© EDP Sciences 1998
J. Phys. IV France 08 (1998) Pr8-119-Pr8-126
DOI: 10.1051/jp4:1998815
On the characteristic scales involved in a fragmentation process
C. Denoual1 and F. Hild21 DGA/CTA, Département Surfaces et Matériaux en Conditions Sévères, 16 bis avenue Prieur de la Côte d'Or, 94114 Arcueil cedex, France
2 ENS de Cachan, CNRS, Université Paris 6, 61 avenue du Président Wilson, 94235 Cachan cedex, France
Abstract
Dynamic loadings produce high stress waves leading to the fragmentation of brittle materials such as ceramics.
The main mechanism used to explain the change of the number of fragments with stress rate is an obscuration (or shielding) phenomenon. A probabilistic damage model is proposed and scalings are proposed. This approach allows an estimation of the characteristic size of structure involved in the transition between single fragmentation (quasi-static loading) and multiple fragmentation (dynamic loading). This criterion is used to understand the mechanism leading to damage localization for low impact velocity.
© EDP Sciences 1998