Tested with CGX 2.19 / CCX 2.19
- Axisymmetric model of a valve with valve seat
- Linear elastic material
- Penalty contact with friction (surface to surface)
- Path plot of contact pressure and slip
- Pressure load
| File | Contents |
|---|---|
| par.pre.fbd | Pre-processing script for CGX (parametrized with param.py) |
| valve.inp | CCX input |
| post.fbd | CGX post-processing script |
| path.gnu | Gnuplot script for the contact plot |
| test.py | Python script to run the full simulation |
The valve and the valve seat ring are meshed with axisymmetric second order triangular elements. This allows for free meshing,
The mesh is controlled by a global size (parameter esize) and the refinement factor at the contact zone (parameter refine).
| Parameter | Value | Unit | Description |
|---|---|---|---|
r1 |
3 | mm | |
r2 |
4 | mm | |
r3 |
15 | mm | |
h1 |
4 | mm | |
h2 |
3 | mm | |
fase |
2 | mm | |
esize |
0.5 | mm | Element size |
refine |
5 | Refinement factor in the contact zone | |
d1 |
1 | mm | |
d2 |
fase | mm | |
d3 |
1 | mm | |
d4 |
2 | mm | |
dy1 |
1 | mm | |
dy2 |
1 | mm | |
dy3 |
fase | mm | |
dy4 |
1 | mm |
> param.py par.pre.fbd
> cgx -b pre.fbd
> ccx valve
> monitor.py valve
The postprocessing script generates plots of the equivalent stress of the 2D base and of the expanded model. Also, path plots of the contact pressure and slip are generated.
> cgx -b post.fbd
For wear prediction, contact pressure and slip are relevant.
