Elastic-plastic indentation creep of glassy poly(methyl methacrylate) and polystyrene: characterization using uniaxial compression and indentation tests
| Autor: | C. G'Sell, J. M. Hiver, P. Berthoud |
|---|---|
| Přispěvatelé: | Unité d'Agronomie de Laon-Péronne ( LILL LAON AGRO), Institut National de la Recherche Agronomique (INRA), ProdInra, Migration |
| Rok vydání: | 1999 |
| Předmět: |
[SDE] Environmental Sciences
Materials science Acoustics and Ultrasonics [SDV]Life Sciences [q-bio] 02 engineering and technology 01 natural sciences Stress (mechanics) chemistry.chemical_compound Indentation 0103 physical sciences Composite material Penetration depth ComputingMilieux_MISCELLANEOUS 010302 applied physics Stress–strain curve Strain rate 021001 nanoscience & nanotechnology Condensed Matter Physics Poly(methyl methacrylate) Surfaces Coatings and Films Electronic Optical and Magnetic Materials [SDV] Life Sciences [q-bio] Creep chemistry visual_art [SDE]Environmental Sciences visual_art.visual_art_medium Polystyrene 0210 nano-technology |
| Zdroj: | Journal of Physics D: Applied Physics Journal of Physics D: Applied Physics, IOP Publishing, 1999, 32, pp.2923-2932 |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/0022-3727/32/22/315 |
| Popis: | This paper discusses the time-dependent mechanical response of poly(methyl methacrylate) (PMMA) and polystyrene (PS) subjected to a shallow indentation made by a 750 µm radius steel ball at 25 °C. The penetration depth was measured as a time-response to a prescribed loading history of the indenter. The tests were performed in the intermediate elastic-plastic regime, which is of paramount importance when dealing with the mechanics of a multicontact interface between rough bodies. The creep characteristics under constant load were analysed with an Eyring law relating the average stress and the strain rate in the deformed volume. The results were compared to data obtained by a standard uniaxial compression test on the bulk material. We have deduced a simple empirical rule which accounts for the heterogeneous stress and strain fields under the indenter and reduces the intricate problem of elastic-plastic indentation creep to an effective scalar rule. |
| Databáze: | OpenAIRE |
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