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Développement et mise en oeuvre de méthodes optiques pour la mesure de relief et de champ de déformations en vue de la modélisation d'organes biologiques

Abstract : This study concentrates on the characterisation of biological materials by means of optical methods of measurement. Two research fields were considered: meshes in finite elements and the measurement of plane strains. Meshes in finite elements can be obtained from the relief of the organs studied. We then developed a technique projecting sinusoidal gratings of vertical lines which were analysed using phase-shifting techniques to get a better accuracy. A special calibration procedure of the experimental set-up was developed for this purpose. An extension of the tracking method allowed measuring plane strains on skin. In order to study all the mechanical behaviours of this biological material we carried out simple tensile tests, relaxation tests, tensile tests with constant acceleration and biaxial tensile tests. The viscoplasticity of skin and the orthotropy of its structure were thus demonstrated.
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https://tel.archives-ouvertes.fr/tel-00008546
Contributor : Cyril Brèque <>
Submitted on : Monday, February 21, 2005 - 3:44:27 PM
Last modification on : Thursday, September 24, 2020 - 4:00:22 PM
Long-term archiving on: : Friday, April 2, 2010 - 9:42:35 PM

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  • HAL Id : tel-00008546, version 1

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Cyril Brèque. Développement et mise en oeuvre de méthodes optiques pour la mesure de relief et de champ de déformations en vue de la modélisation d'organes biologiques. Autre [q-bio.OT]. Université de Poitiers, 2002. Français. ⟨tel-00008546⟩

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