Shock Compression Response of Model Polymer/Metal Composites
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Washington State Univ., Pullman, WA (United States)
Heterogeneous materials do not respond mechanically to an impulse in the manner of homogeneous metals and alloys. Wave propagation in a microstructure with chemically distinct identities, that are only in incidental contact with each other, is a complex process and not well understood. Here we report on a series of plate-impact experiments on a polymer-metal composite, where the volume fraction of the metallic phase was systematically varied from 0% to 40%, while other parameters like the sample thickness were kept constant. The velocity histories at the sample/window interfaces were measured to examine the continuum response corresponding to the internal materials processes. The unfilled polymer demonstrated a steady shock wave response; whereas the wave profiles obtained from mixture samples showed structured waves that depended on the volume fraction of the fill. Furthermore, the shock wave profiles were quantified using parameters strongly correlated to the material composition. The likely physical basis of these correlations is discussed.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1633514
- Report Number(s):
- LLNL-JRNL--737373; 890115; ISBN: 978-3-319-95089-1
- Journal Information:
- Proceedings of the Society for Experimental Mechanics Series, Journal Name: Proceedings of the Society for Experimental Mechanics Series Vol. 1; ISSN 2191-5644
- Publisher:
- Springer NatureCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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