Week- 5 - Solid meshing
Aim:- For the given Rear view mirror component, check for the geometrical errors and mesh the Surfaces with the given 2D element Quality criterias given below.
S.No Quality criteria Value
- Target element length 1
- Minimum length 0.5
- Maximum length 2
- Tet collapse 0.2
Procedure
Imported the component into the ANSA interface. Rear mirror component assembly consists of four components so, proceeded component meshing one by one.
Before started the tetra mesh. performed geometry clean up, geometry checks to every component.
Checked the connections between surfaces, connections are established by using Topo -à Facesà Topo module.
Performed Geometry checks, topo on the component as shown above pictures
Meshing:
3D meshing is a structured/unstructured volume mesh used to mesh the component more than 6mm thickness or L/T> 10.
Examples for components which needs 3d meshing are piston, crank, engine head and cast componnts, gear box etc.
Procedure followed for 3D meshing:
In Ansa, first deployed 2d tria mesh on surface then the 2d tria mesh is defined into a3D volume mesh.
Assigned quality criteria for the model, pictures shown below.
For the above component, 2d ortho tria mesh had been deployed on curvature surfaces. Using normal trias on curvature surfaces leads to elements failure, geometrically not suitable sometimes and normal trias are used to mesh the planar surfaces.
Elements failures occurred during the 2d tria mesh, resolved those issues by moving the nodes. Avoiding of those failures cause more elemental failure in 3d meshing.
After 2d mesh completed defined a volume to create 3d volume mesh and assigned different PID.
After defining the volume, 3d mesh created by using tetra rapid or tetra fem
Volumes module-à unstructured mesh--->tetra rapid
The same procedure repeated for the remaining components.
Conclusion:
The 3d mesh had been generated for the given rear mirror component, fixed the error while meshing the component and generated 3d mesh for all components.