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Université d'Orléans |  |
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Université d'Orléans | |
| HAL: insu-00181111, version 1 |
| DOI: 10.1504/IJNT.2007.015466 |
| Detailed view |  Export this paper |
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| International Journal of Nanotechnology 4, 6 (2007) 712-729 |
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| Friction-induced sheet nacre fracture: effects of nano-shocks on cracks location |
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| Philippe Stempflé 1Olivier Pantalé 1 |
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| (2007) |
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| Nacre (the pearly internal layer of molluscan shells) is an attractive nanocomposite displaying high mechanical properties, low density and a good biocompatibility with human bones. It is currently studied for both the prosthesis design and the creation of new organic/inorganic hybrid materials by mimicking biomineralisation processes. These exceptional mechanical properties are ascribed to its highly ordered layered 'bricks and mortar' microstructure and more particularly to the energy absorption ability of the mortar during crack propagation. However, this ability appears to be drastically reduced in presence of nano-shocks generated during friction by the dynamic solicitations. This paper compares two Finite Element simulations – a quasi-static compression test and a dynamic impact test – in order to consider the fracture mechanisms induced by friction. It reveals that cracks migrate from the mortar to the bricks, involving in the latter case, the formation of wear nano-debris. These numerical results are confronted with experimental results during friction. |
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| 1: | Laboratoire Génie de Production |
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Ecole Nationale d'Ingénieurs de Tarbes |
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| 2: | École nationale supérieure des Mines de Nancy |
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Université de Lorraine |
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| 3: | Biologie des organismes marins et écosystèmes (BOME) |
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CNRS : UMR5178 – Université Pierre et Marie Curie [UPMC] - Paris VI |
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| 4: | Institut des Sciences de la Terre d'Orléans (ISTO) |
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CNRS : UMR6113 – INSU – Université d'Orléans |
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| subject | : | Sciences of the Universe/Earth Sciences/Geochemistry Environmental Sciences/Global Changes Sciences of the Universe/Earth Sciences/Geophysics Physics/Physics/Geophysics |
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| sheet nacre fracture – friction – nanowear – nanoindentation – numerical simulation – dynamic impact tests – nanoshocks – crack location – nanocomposites – nanotechnology – biomineralisation – microstructure – energy absorption – crack propagation. |
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| Attached file list to this document: | |||||
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| insu-00181111, version 1 | |
| http://hal-insu.archives-ouvertes.fr/insu-00181111 | |
| oai:hal-insu.archives-ouvertes.fr:insu-00181111 | |
| From: Nathalie Pothier | |
| Submitted on: Wednesday, 7 November 2007 15:42:26 | |
| Updated on: Wednesday, 7 November 2007 15:43:58 | |
