High Strain and Strain-Rate Behaviour of PTFE/Aluminium/Tungsten Mixtures

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dc.creatorAddiss, John
dc.creatorCai, Jing
dc.creatorWalley, Stephen
dc.creatorProud, William
dc.creatorNesterenko, Vitali F.
dc.date2007-11-08
dc.date.accessioned2026-07-07T08:41:32Z
dc.date.available2026-07-07T08:41:32Z
dc.descriptionConventional drop-weight techniques were modified to accommodate low-amplitude force transducer signals from low-strength, cold isostatically pressed 'heavy' composites of polytetrafluoroethylene, aluminum and tungsten. The failure strength, strain and the post-critical behavior of failed samples were measured for samples of different porosity and tungsten grain size. Unusual phenomenon of significantly higher strength (55 MPa) of porous composites (density 5.9 g/cc) with small W particles (less than 1 micron) in comparison with strength (32 MPa) of dense composites (7.1 g/cc) with larger W particles (44 microns) at the same volume content of components was observed. This is attributed to force chains created by a network of small W particles. Interrupted tests at different levels of strain revealed the mechanisms of fracture under dynamic compression.
dc.description4 pages, 6 figures, paper is in press in Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, American Institute of Physics,2008
dc.identifierhttps://arxiv.org/abs/0711.1191
dc.identifierhttp://arxiv.org/abs/0711.1191
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/141700
dc.subjectSoft Condensed Matter
dc.subjectMaterials Science
dc.titleHigh Strain and Strain-Rate Behaviour of PTFE/Aluminium/Tungsten Mixtures
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