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Theses

Simulation dynamique de corps biologiques et changements de topologie interactifs

François Boux de Casson 1
1 SHARP - Automatic Programming and Decisional Systems in Robotics
GRAVIR - IMAG - Laboratoire d'informatique GRAphique, VIsion et Robotique de Grenoble, Inria Grenoble - Rhône-Alpes
Abstract : This thesis deals with the simulation of the dynatnic mechanical behavior of biological tissues, in a real-time context. It proposes methods and algorithms to simulate topological changes induced by interactions between the virtual model and a human operator. In the first chapter, the foundations of continuum mecanics are presented, followed by the computer science approach to model deformable bodies. In the second chapter, an interactive non-linear heterogeneous model of the human liver is proposed. The non-linear behavior is modeled using non-linear connectors, responding to a polynomial law. Timing the viscous parameter in a different way for the skia and the inner of the bodie provides a dynatnic heterogeneous mechanical behavior. In the third chapter, to model topological changes (typically tearing and cutting operations) we propose to separate the elements of the simulation, instead of destroying or splitting them as is often proposed in the literature. The objective of this approach is to be as realistic as possible, avoiding an increase in the nutnber of elements of the model during rerneshing operations. Indeed, increasing excessively the number of elements leads to non real-time simulations. The implementation choices and experimental results are presented in the last chapter.
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https://tel.archives-ouvertes.fr/tel-00010170
Contributor : Isabelle Rey <>
Submitted on : Friday, September 16, 2005 - 10:19:02 AM
Last modification on : Monday, December 28, 2020 - 3:44:01 PM
Long-term archiving on: : Friday, April 2, 2010 - 10:08:33 PM

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François Boux de Casson. Simulation dynamique de corps biologiques et changements de topologie interactifs. Autre [cs.OH]. Université de Savoie, 2000. Français. ⟨tel-00010170⟩

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