Challenge

Week- 5 - Solid meshing

AIM

To do a pre-processing on a given Rearview mirror component model and to perform solid meshing on the model using ANSA.

OBJECTIVE:

PROCEDURE:

IMPORTING THE CAD MODEL:

The CAD model is imported into the workspace by using file > open and select the CAD model.
The model will be imported into the workspace.
In ANSA we can import all types of CAD software file formats.

CONS RESOLUTION

Cons resolution has to be done in order to ensure the equal distance between the cons.
This is done by going into the classic mesh module- permimeters-lenghth and then input the lengths 1.(in this case)
Topo is done later from topo module> faces> topo. select the entire model and give the centre mouse click.

2D MESHING:

First, the model is split into 4 components based on the property each with different property id. The four different components are shown below.

Quality Criteria.

Go to quality criteria (shells option)and input the criteria mentioned in the question.; i.e min length= 0.5 , max length=2.
then go to solids option and select collapse option and enter the value 0.2.
apply and close.

MESH parameters

after selecting the mesh parameters option from the tool bar - change the target length to 1 and min length to 0.5.
change the type of mesh required to _ tria.

BASIC STEPS Followed:

After cons reolution for the entire model, each and every different part is seperately taken.
As a first process after the selection of one of the individual part- Topo is given to eliminate all single cons. topo module>faces>topo
The parts are measured for the distance between the cons using the measure tool.
if the distance between the two cons is less than the given minimum length(in the question) the cut tool from classic mesh module> macros>cut is used to remove on of the cons, resulting in the surface becoming clearer and the min length being achieved.

PROCEDURE used for meshing

The meshing is done using mesh generation > best mesh tool. This tool generates the mesh using the element type given.
The curved faces are given the mesh element type as ortho tria and the flat surfaces are given the mesh element type as tria.
If any erroes are shown(in red) with respect to the min or max length on any surface- this can be be rectified using > shell mesh> reconstruct or smooth option.

The errors in red are cleared using the classic mesh module> shell mesh > reconstruct or smooth command.

Volume addition process:

After meshing and making the surface free of errors- go to checks> penetration > intersectiona and click execute.
After this process go to V.mesh odule> volume> define and select in the drop down select visible.
Afer that go to unstcuctured mesh>Tetra rapid and select the entire modela nd click centre mouse. Volume is defined.

Similar process is followed for all the remaining 3 components. (photos attached).

FINAL COMPLETED MODEL

LEARNING OUTCOMES:

CONCLUSION:

Geometry cleanup, 2D meshing and volume meshing of the given Rearview mirror model were successfully done.

Ship work like this
in your own course.