Challenge

Week 2 Challenge : Surface meshing on a Pressure valve

SURFACE MESHING ON A PRESSURE VALVE

To generate a surface mesh of Pressure Valve model Using ANSA.

Procedure

Geometry Cleanup

When the cad model is imported to ansa, it has lots of topological errors.
We can see lot of missing faces in it.
Inside the body of the respected geometry we have a sealed tube and a spring interconnected to each other.
For the missing faces, we can create new faces using coons option,(faces>new>coons)
Use fill hole option to fill any gap on the faces.
Before creating surfaces for the missing places, a geometry check is done in order to get where are single cons and other errors are present, (checks manager>geometry check).
All errors are cleaned up manually one by one.

PID

Once the geometrical errors are rectified, we'll assign PID's.
Assigning PID's can be very helpfull in order to mesh it individually, rather than meshing the entire component at one go.

Mesh generation

Before meshing the entire component, we will be doing surface meshing providing lengths for three different cases i.e (1mm,3mm,5mm), we will be assigning perimeters and macros, mesh>perimeters>length
After assigning the required length we will be going for a spot mesh, mesh generation>spot mesh
While meshing , we must ensure that proper element type is given, here the element type that we assign is tria.
Similarly, for other two different lengths mesh is generated.
In total 3 different cases are generated.

Learning Outcome

Conclusion

In this project, surface mesh was generated varying element length.
The mesh obtained for element length 1mm was fine and accurate than compared to other two length because no unmeshed surfaces was present and the geometry obtained was also good.
Increasing the number of nodes, increases the accuracy of results.

Link for the obtained results

Ship work like this
in your own course.