Confeti
Mechanical Modeling and Simulation for
the Virtual Reality
Collisions, contact and friction.
Participants
Objectives
In virtual reality, one major issue is the representation of real
phenomena and the fine control of the
model behind this. We believe
that such models must rely on a deep understanding of the
physical
phenomena, that we want to model. The needs for the
various applications will possibly lead us to
simplify these models in
order to achieve specific goals for real time applications. This
is crucial in the
field of dynamical simulations. Such simulations are
made necessary to carry out the interaction
between objects and
although to carry out the interaction between the human being and the
objects by some haptic interfaces
In this subject, we propose to study the processing chain of the
interactions in a scene. This chain
consists in two main points:
- Geometric detection of the interactions (contacts and impacts);
- Numerical computation of the response.
The first part of this chain is already partially carried out by
effective detection algorithms which are already
integrated within the OpenMASK
Platform of the SIAMES project. The second part constitutes
the core of the collaboration between the project SIAMES and
the project BIPOP.
The main aim of the work is to bridge the gap
between the know-how of
project BIPOP on the Non-Smooth Mechanics and particularly on the
following subjects:
- Time
integration methods for non smooh systems (Time-stepping and
event-driven);
- Numerical
resolution of the unilateral
constraints, Dry friction (Coulomb's law) and impact in the framework
of the complementarity problems and non-smooth optimization;
- Modeling and numerical simulation of enhanced nonsmooth
interface law (multiple impact law, cohesion, failure, ...)
and
the know-how of project SIAMES on the following subjects:
- the
integration of resolution methods for contact and impact in an
application of virtual reality
- the simulation of rigid
poly-articulated systems
- the simulation of continuum media by finite
elements method.
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©
Vincent Acary,
2004-2005. vincent.acary@inrialpes.fr
Last update: October 10, 2005