FEM EquationDeformation
FEM EquationDeformation |
Menu location |
---|
Solve → Deformation equation |
Workbenches |
FEM |
Default shortcut |
None |
Introduced in version |
1.0 |
See also |
Elasticity equation, FEM tutorial |
Description
This equation describes the nonlinear elastic deformation of rigid bodies.
For info about the math of the equation, see the Elmer models manual, section Finite Elasticity.
Usage
- After adding an Elmer solver as described here, select it in the tree view.
- Now either use the toolbar button or the menu Solve → Deformation equation.
- Change the equation's solver settings or the general solver settings if necessary.
Solver Settings
For the general solver settings, see the Elmer solver settings.
The deformationequation provides these special settings:
- DataCalculate Pangle: If the principal angles should be calculated.
- DataCalculate Principal: If all stresses should be calculated.
- DataCalculate Strains: If strains will be calculated. This will also calculate the stresses, even if DataCalculate Principal or DataCalculate Stresses is false.
- DataCalculate Stresses: If stresses should be calculated. Compared to DataCalculate Principal the Tresca yield criterion and the principal stress will not be calculated.
- DataConstant Bulk System: See the Elmer manual for more info.
- DataVariable: The variable for the elasticity equation. Only change there the 3 to 2 if you have a 2D geometry.
Equation:
- DataPlane Stress: Computes solution according to the plane stress situation. Applies only for 2D geometry.
Constraint Information
The elasticity equation takes the following constraints into account if they are set:
- Constraint fixed
- Constraint displacement
- Constraint force
- Constraint initial temperature
- Constraint pressure
- Constraint self weight
- Constraint spring
Note
Except for calculations in 2D, for all above constraints it is important that they act on a face. Constraints for 3D set to lines or vertices are not recognized by the Elmer solver.
Results
The available results depend on the solver settings. If none of the DataCalculate * settings was set to true, only the displacement is calculated. Otherwise also the corresponding results will be available.
- Materials: Solid, Fluid, Nonlinear mechanical, Reinforced (concrete); Material editor
- Element geometry: Beam (1D), Beam rotation (1D), Shell (2D), Fluid flow (1D)
Constraints
- Electromagnetic: Electrostatic potential, Current density, Magnetization
- Geometrical: Plane rotation, Section print, Transform
- Mechanical: Fixed, Displacement, Contact, Tie, Spring, Force, Pressure, Centrif, Self weight
- Thermal: Initial temperature, Heat flux, Temperature, Body heat source
- Overwrite Constants: Constant vacuum permittivity
- Solve: CalculiX Standard, Elmer, Mystran, Z88; Equations: Deformation, Elasticity, Electrostatic, Electricforce, Magnetodynamic, Magnetodynamic 2D, Flow, Flux, Heat; Solver: Solver control, Solver run
- Results: Purge, Show; Postprocessing: Apply changes, Pipeline from result, Warp filter, Scalar clip filter, Function cut filter, Region clip filter, Contours filter, Line clip filter, Stress linearization plot, Data at point clip filter, Filter function plane, Filter function sphere, Filter function cylinder, Filter function box
- Additional: Preferences; FEM Install, FEM Mesh, FEM Solver, FEM CalculiX, FEM Concrete; FEM Element Types
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