Dynamic tests on a cohesive and frictional material. Influence of high pressure and high strain rate on compaction and shear
| Autor: | Maxime Biessy, Didier Picart, Patrice Bailly, Franck Delvare |
|---|---|
| Přispěvatelé: | Laboratoire Pluridisciplinaire de Recherche en Ingénierie des Systèmes, Mécanique et Energétique (PRISME), Université d'Orléans (UO)-Ecole Nationale Supérieure d'Ingénieurs de Bourges (ENSI Bourges), CEA Le Ripault (CEA Le Ripault), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
chemistry.chemical_classification
High strain rate Materials science business.industry Stress–strain curve Compaction 02 engineering and technology Polymer Structural engineering [SPI.MECA.MSMECA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Materials and structures in mechanics [physics.class-ph] Strain rate [PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph] 021001 nanoscience & nanotechnology 020303 mechanical engineering & transports 0203 mechanical engineering Shear (geology) chemistry High pressure Composite material 0210 nano-technology business Radial stress |
| Zdroj: | 9th International conference on the mechanical and physical behaviour of materials under dynamic loading 9th International conference on the mechanical and physical behaviour of materials under dynamic loading, Sep 2009, Brussels, Belgium. pp.213-218, ⟨10.1051/dymat/2009029⟩ |
| Popis: | Many of aggregate composites are made of small si ze particles mixed with a highly compliant rubbery polymer. When the loading leads to high pre ssures, the behaviour gets closer to this of cohesi ve, frictional, and compactable materials. When this ki nd of material is subjected to an impact, the loadi ng domain is the case of high pressure (from 100 to 10 00 MPa) and high strain rate (roughly 1000 s -1 ). An experimental study is led by using the technique of the SHPB. The specimens are small cylinders placed in a ring which creates a passive confinement by op posing to the radial displacements. The instrumentation of the ring allows to estimate the radial stress and the radial displacement. The main point is that it makes possible the follow-up of the sphe rical and deviatoric parts of the stress and strain tensors during the test, without restrictive hypothesis on the behaviour of the material. The results show a h igh sensitivity to the strain rate. The stresses evolut ions show that the frictional phenomenon is sensiti ve even under high pressures. |
| Databáze: | OpenAIRE |
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