| 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 | 01047 | |
| Number of page(s) | 6 | |
| Section | Modelling and Numerical Simulation | |
| DOI | https://doi.org/10.1051/epjconf/201818301047 | |
| Published online | 07 September 2018 | |
https://doi.org/10.1051/epjconf/201818301047
Shock wave speed and stress-strain relation of aluminium honeycombs under dynamic compression
1
Institute of Systems Engineering, China Academy of Engineering Physics,
Mianyang,
Sichuan
621999,
China
2
CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China,
Hefei,
Anhui
230026,
China
*
Corresponding author : pspwang@mail.ustc.edu.cn
Published online: 7 September 2018
The propagation of layer-wise crushing bands in cellular materials under dynamic impact can be described by the plastic shock wave model. A cell-based finite element model of irregular aluminum honeycomb is constructed to carry out several constant-velocity compression tests. The shock wave speed is obtained by the one-dimensional stress distribution in the specimen along the loading direction. The relation between the shock wave speed and impact velocity is obtained and analyzed. It is found that the relation tends to be linear with the increase of the impact velocity. But the shock wave speed tends to be a constant value with the decrease of the impact velocity. A piecewise model is proposed to describe the dynamic stress-strain relation of aluminum honeycombs based on a piecewise hypothesis of the relation between the shock wave speed and the impact velocity together with the one-dimensional shock wave theory. Different stress-strain relations corresponding to different impact velocity regions and different deformation modes are obtained.
© 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.
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