| Issue |
EPJ Web Conf.
Volume 183, 2018
DYMAT 2018 - 12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
|
|
|---|---|---|
| Article Number | 01064 | |
| Number of page(s) | 6 | |
| Section | Modelling and Numerical Simulation | |
| DOI | https://doi.org/10.1051/epjconf/201818301064 | |
| Published online | 07 September 2018 | |
https://doi.org/10.1051/epjconf/201818301064
Analysis of the localization process leading to fragmentation of dynamically expanded rings
1
CEA, DAM,
Gramat,
F-46500,
France
2
LEM3, Université de Lorraine - UMR CNRS 7239,
BP 15082, Metz Cedex 03,
57073 France
* e-mail: skander.elmai@cea.fr
Published online: 7 September 2018
A novel extension of the Linear Stability Analysis (LSA) applied to the development of the instabilities in a round bar in dynamic extension is proposed. The history of development of the instabilities and the multi-modal aspect of the perturbations are now considered in this extension. A new statistical approach based on the power spectrum of the perturbation pattern is proposed to evaluate the variability of the spacing between potential sites of necking. This approach has been applied to analyze the LSA results and predictions obtained from numerical simulations of a bar in dynamic extension. It is shown that both analytical and numerical approaches provides good agreement
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.