Étude de la microstructure et du comportement mécanique de la fibre de soie

Abstract : Natural polymers seem to be more and more a credible alternative for many applications such as technical or biomedical applications. They have evident qualities such as modularity, durability, and usually biocompatibility. Nevertheless a detailed understanding of the mechanisms governing the behaviour of these materials is difficult and usually incomplete. This study deals with the understanding of the relationship between the mechanical behaviour and microstructure of silk fibres. Precise mechanical characterization has been carried out, sometimes with original experiments such as the association of a mechanical testing machine and electronic microscopy. Hence, it has been shown that silk presents a composite behaviour and all its constituents are important explaining the mechanical behaviour of industrial silk yarns. This behaviour has been described under different atmospheric conditions of temperature and humidity. This characterization has been linked with a microstructural description using X-ray diffraction and Raman spectroscopy techniques. Notably, Raman spectrometry has been associated with an in situ mechanical tester machine. This has permitted a discussion about the link between microstructure and mechanical behaviour. In this way, it has been proved that it is possible to control microstructure and mechanical behaviour using biotechnologic methods at the genetic level. This opens new ways for promising improvements for such material. Finally, a model has been developed, which is simple but effective, based on a physical description of the material. This has validated the advances, made in this study, into the understanding of silk. These results are expected to encourage other numerical studies on assemblies, in order to bring a new point of view about industrial products.
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https://pastel.archives-ouvertes.fr/pastel-00540941
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Submitted on : Monday, November 29, 2010 - 3:11:20 PM
Last modification on : Monday, November 12, 2018 - 11:01:48 AM
Long-term archiving on: Friday, December 2, 2016 - 9:59:02 PM

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  • HAL Id : pastel-00540941, version 1

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Vincent Jauzein. Étude de la microstructure et du comportement mécanique de la fibre de soie. Matériaux. École Nationale Supérieure des Mines de Paris, 2010. Français. ⟨NNT : 2010ENMP0034⟩. ⟨pastel-00540941⟩

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