FEM EquationElasticity

Description
This equation describes the mechanical properties of rigid bodies.

Usage

 * 1) After adding an Elmer solver as described here, select it in the tree view.
 * 2) Now either use the toolbar button [[Image:FEM_EquationElasticity.svg|16px]] or the menu.
 * 3) Change the special solver settings or the general solver settings if necessary.

Solver Settings
For the general solver settings, see the Elmer solver settings.

The elasticity equation provides these special settings:



Frequency Analysis
To perform a frequency analysis (calculation if the eigenmodes and eigenfrequencies), you need to
 * 1) Set : to true
 * 2) Set : to the highest number of eigenmodes you are interested in. The smaller this number the shorter the solver runtime since higher modes can be omitted to be determined.
 * 3) Add a constraint fixed and set at least one face of the body as fixed.
 * 4) Accordingto the Elmer manual the best results for eigenmode analysis are obtained with direct solving. Therefore
 * 5) Set  to Direct.
 * 6) Set  to Umfpack.
 * 7) Eventually run the solver.