### ForceField FEM on Tetrahedra

Description:
The TetrahedronFEMForceField component is used to model an object by the Finite Element Method on a mesh composed tetrahedron. There are three main methods of computation:

- small : the simplest method using linear formulation in case of small displacement
- large : the corotational formulation allowing large displacement
- polar : the polar decomposition formulation allowing large displacement

Trivial user can use at least two main parameters related to the linear elasticity property of the modeled object

- Young's modulus
- Poisson's ratio

By adjusting these coefficients, one can understand its relation with the mechanical behavior of objects and then can choose the appropriated parameters. There are also other parameters for advanced users :

- localStiffnessFactor
- updateStiffnessMatrix
- computeGlobalMatrix
- etc.

By double-clicking on the component, users can see all the parameters of the component.

Key Points:

- TetrahedronFEMForceField works only with a tetrahedra mesh
- Technical documentation [Nesme, Matthieu and Payan, Yohan and Faure, Francois] , Efficient Physically Plausible Finite Elements .2005

Results: