How to Run PM FlexTire™
This example demonstrates running PM FlexTire™ using the Clay1_6x2m.dem EDEM simulation deck with the Tractor Tire, both available from the Altair Marketplace.
Steps to Set Up and Run PM FlexTire™ in EDEM
Open the Example Simulation Deck
- Open
Clay1_6x2m.dem from the PM Example Files (available from the Altair Marketplace) in EDEM.
Import the Tire Geometry
- Import the tire OBJ file into EDEM.
- Note: This OBJ file should be generated using
STPtoOBJ.exe prior to import.
Enable PM FlexTire™ Solver in EDEM
Tools > Options > Additional Components > Enable FlexTire
Update the .FlexTire File
- Units: Specify the appropriate unit system, as these units determine how all values in the file are interpreted.
- Recalculation Frequency: Set the frequency at which the PM solver recalculates the normal forces.
- Solver Output (optional): Enable and specify output frequency if desired.
- Geometry_Name: Update to match the geometry name used in your EDEM simulation.
- Input Files: Point to the required input files (some generated by
STPtoOBJ.exe). - Center of Mass: Update the tire’s center of mass location.
Update the .fxt File
Populate the following sections in the .fxt file:
[UNITS] – Specify the appropriate unit system, as these units determine how all values in the file are interpreted.
[RIM_MASS_PROPERTIES] – Enter rim properties.
[TIRE_MASS_PROPERTIES] – Enter tire mass properties.
[BEAD] – Enter bead properties.
[MATERIAL] – Define global material properties for the tire carcass.
Note: The input damping is applied to all elements of the tire not just the carcass.
Material Properties for Inner Liner, Belt, and Sidewall
- [MATERIAL_INNER_LINER], [MATERIAL_BELT], [MATERIAL_SIDEWALL]
Depending on material formulation type:
- Isotropic (material = 0):
EMOD, POISSONS, THICKNESS
- Orthotropic (material = 1):
EMOD_XX, EMOD_YY, GMOD, POISSONS_XX, POISSONS_YY, THICKNESS
- Anisotropic (material = 2):
EMOD_XX, EMOD_YY, GMOD, POISSONS_XX, POISSONS_YY, POISSONS_ZZ, THICKNESS
Specify Air Pressure and Inflation Duration
- Set the air pressure for the tire.
- Set the inflation duration to approximately 100 EDEM timesteps to achieve stable and quick inflation results.
How to Video
The Step-by-step video can be access here: Altair How-to-Video
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