Week- 5 - Solid meshing

Abhishek Anil Patil | 20/06/2022

Objective

For the given Rear view mirror component, check for the geometrical errors and mesh the Surfaces with the given 2D element Quality criteria’s given below.

S. No	Quality Criteria	Value
1	Target/Average length	1
2	Minimum Length	0.5
3	Maximum Length	2

Use tetra elements to mesh the Volumes defined in the model and check for the below quality after Volume meshing.

S. No	Quality Criteria	Value
1	Tet collapse	0.2

Surface Quality after Volume mesh should be good. (i.e., There should not and kinks and dips on the surface of the component.)
(Refer “Model Requirements” in “Grading Policy” to know what to be done in the model)

Write a detailed report on your approach for this model. (Refer “Report Requirements” in “Grading Policy” to know what to be added in the report)

Note:

1. For 2D Elements, only check for Min length and Max length errors.
2. For 3D Elements, only check Tet Collapse errors.

CAD model

Procedure

Geometry cleanup

All the single cons are stitched to double cons using Topo

Orient is used to orient all surfaces in one direction

Using checks à geometry à execute, shows geometry errors that can be fixed.

After performing these checks the model looks as shown below

Ball joint

Mirror

Mirror holder

Mirror shaft

Meshing

Using Mesh à length à applying target length as 1mm

Assigning mesh parameters, target length is 1mm, min length is 0.5mm,

Mesh is solid structural mesh and the elements are tria

Quality Criteria

The above quality criteria are specified below

Best mesh was used to generate the mesh

The curved surfaces were given ortho tria elements and the flat surfaces were given normal tria elements

Ball joint

Mirror

v

Mirror holder

Mirror shaft

Tetra Volume Mesh

Volume mesh à Define à visible

This check whether the volume is defined or not

It also creates a volume with separate PID for the model

Then use Tet Rapid and select the model to create tetra elements

Use the following options while doing so

Since model is not that big, there is no reason to change the growth rate.

Deselect the create pyramid option

The volume mesh using tetra elements are shown below

Ball joint

Mirror

Mirror holder

Mirror shaft

Conclusion

We learned the process for solid meshing

We performed volume mesh on the components and checked for tet collapse.