Week- 5 - Solid meshing
AIM:
To check for geometrical errors and perform meshing for the given rear view mirror model with given quality criteria.
PROCEDURE:
1.First we have to import the cad model to ANSA.
2.After importing perform topo on the whole model as there is no connectivity and check for any irregularities in the geometry . In this model there is no such errors and the model is clean.Next we can proceed for geometrical check.
3.Go to Tools>>Check>>Geometry and execute.Now the errors will be displayed.
4.These errors can be automatically fixed by ANSA itself .Select all the errors and right click, select fix.Now the model is free of geometrical errors and we can proceed for next step.
5.Next we can proceed to meshing, here there is no need for mid surface extraction as this solid meshing.We will perform meshing on the surface of the component and generate volume based on the surface mesh.
6.Set the perimeter length and macro length as 1 for easier meshing process.Now we have to set mesh and quality parameters.
7.Next start the meshing process go to Mesh Module>>Mesh Generation>>Spot mesh and select the surface to be meshed.Here for solid meshing only tria elements are needed and no quads should be present.In curved regions use ortho tria elements for meshing and for flat elements use normal tria elements.
ORTHO TRIA ELEMENTS IN MESH
8.Similarly mesh the parts with ortho tria and tria elements . Use options like reconstruct,smooth for proper mesh flow and for removing elemental failures.
9.Next we have to generate volume for the parts with the meshed surface.For that first we have to define the volume go to Volume mesh module>>Volumes>>Define >>Manual and select the meshed part.Then create a new PSOLID for the part in the property window.
10.After creating new PSOLID go to Volume mesh module>>Volumes>>List .This shows all the available defined volumes now click remesh and select tetra rapid option .Now the volume will be generated.
VOLUME GENERATED
11.Similarly the meshing is completed for all the parts and the volume is generated.The below images are completed parts:
MIRROR SURFACE
MIRROR BASE
ROTATING PART
MIRROR HOLDER
FINAL MODEL
RESULT:
Thus the given model is checked for geometrical errors and solid meshing is peformed according to given quality criteria.
LEARNING OUTCOMES:
1.Learnt how to perform 3d solid meshing and create tetra mesh.
2.Creating proper mesh flow using ortho tria and normal tria elements.