Week- 8 - Solid meshing
AIM: To use ANSA to perform a 3D unstructured mesh on the specified rearview mirror.
Learning outcome
1. Acquired knowledge of 3D meshing (Solid meshing) and techniques for using ortho trias to capture curved faces.
2. Standards of excellence for solid unstructured meshes and methods to repair faulty parts
3. Hands-on work with the ANSA preprocessor's volume meshing module
Procedure:
1. Import the supplied IGS file into the ANSA workspace by selecting the file under FILE > OPEN.
The following command will paste neighbouring cons with one another and produce a closed geometry for volume meshing: FACES > TOPO > select all the cons in the geometry > OK.
CONS > PASTE is another method to carry out the same procedure, but it will take longer since you must pick each cons separately. With TOPO, you may select all the cons at once.
2.Geomerty assessment.
We perform the geometry check on the CAD to look for needle faces and missing faces.
EXECUTE > TOOL > CHECKS > GEOMETRY
Correct the problems by right-clicking and choosing "Fix." If auto repair is unable to correct the issue, manually fix the CAD by removing the excess faces or by switching the cons.
3.Setting up quality criteria.
Create the meshing quality criterion under UTILITIES > QUALITY CRITERIA.
Utility: Mesh; parameter: Mesh
4.Cleaning up the topology.
In order to prevent mesh quality failure later on, the topology of the CAD must be defined based on the minimum element length once the geometry has been fixed. Elements that don't meet the minimum length requirement must be linked.
5. Shell Meshing.
Avoid any kinks or dips in the curved surfaces you want to capture On curved faces, ortho tria mesh is employed because it catches the curves more precisely than normal trias, whereas normal tria components are used on flat surfaces.
The supplied model is surface meshed using the ortho tria and normal tria combination.
6.Volume Meshing.
It is necessary to establish a volume before doing a volume mesh.
Next click MODULES > VOLUME MESH > DEFINE > OK.
A volume is created, which the LIST option allows you to see and update.Tetrahedral pieces must now be woven into the newly constructed volume. The volume mesh inside the shell mesh may be generated using either tetra fast or tetra FEM.
Conclusion:
The provided rearview mirror is woven with solid tetraelements and examined for quality to meet the requirements.