Physically realistic interactive simulation for biological soft tissues

Matthieu Nesme (1, 2) , Maud Marchal (1) , Emmanuel Promayon (1) , Matthieu Chabanas (3) , Yohan Payan (4) , François Faure (2)

1 TIMC-IMAG - Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525
2 EVASION - Virtual environments for animation and image synthesis of natural objects
3 ICP - Institut de la communication parlée
4 TIMC-IMAG-GMCAO - Gestes Medico-chirurgicaux Assistés par Ordinateur

Many applications in biomedical engineering and surgical simulators require effective modeling methods for dynamic interactive simulations. Due to its high computation time, the standard Finite Element Method (FEM) cannot be used in such cases. A FEM-based method is first presented, which rely on the decomposition of the deformation of each element into a rigid motion and a pure deformation, and a fast implicit dynamic integration without assembling a global stiffness matrix. A second physically-based discrete method is also proposed, derived from computer graphics modeling. These methods are finally compared, in terms of accuracy and speed, to theoretical problems, FEMresults and experimental data.

Mots clés: FEM-based modeling; physical model; elasticity; finite elements; dynamics

Domaines: Biomécanique [physics.med-ph]; Biomécanique [physics.med-ph]

Matthieu Nesme, Maud Marchal, Emmanuel Promayon, Matthieu Chabanas, Yohan Payan, et al.. Physically realistic interactive simulation for biological soft tissues. Recent Research Developments in Biomechanics, 2005, 2, pp.1-22. ⟨hal-00080378⟩