Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2007-08-09
Physics
Condensed Matter
Soft Condensed Matter
5 pages, 6 figures
Scientific paper
10.1063/1.2833241
Recent investigations of the dynamic compressive strength of cold isostatically pressed composites of polytetrafluoroethylene (PTFE), tungsten (W) and aluminum (Al) powders show significant differences depending on the size of metallic particles. The addition of W increases the density and overall strength of the sample. To investigate relatively large deformations multi-material Eulerian and arbitrary Lagrangian-Eulerian methods, which have the ability to efficiently handle the formation of free surfaces, were used. The calculations indicate that the increased strength of the sample with fine metallic particles is due to the formation of force chains under dynamic loading. This phenomenon occurs even at larger porosity of the PTFE matrix in comparison with samples with larger particle size of W and higher density of the PTFE matrix.
Benson David J.
Cai Jianfei
Herbold Eric B.
Nesterenko Vitali F.
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