Week- 5 - Solid meshing

Aim:

To check the Geomentrical errors and Generate mesh for the given CAD model using proper Quality criteria.

Procedure:

• The given CAD model is Rear Mirror.it is used to visualize the vehicles coming from back.
• First,we should check for the Geomentrical Errors using CHECKS MANAGER-geometry and Fix them.

• This is a 3D model.so,we should deploy tria mesh for the component.because,the thickness at x,y and z is almost equal.
• After Fixing the geomentrical errors in Topo mode. we can change to mesh mode to generate mesh.

SHELL Mesh Generation:

Step1:

Use batch mesh to generate mesh on the component.

Step2:

tria mesh should be deployed on the flat regions and ortho tria mesh should be deployed on curves surfaces.

Step3:

Set the Quality criteria according to the given parameters and apply .

Step4:

mesh the entire model with tria mesh and checks weather its failing for quality and re-construct them to attain a good mesh flow.we can check them in hidden mode.

NOTE: Make sure that the model should have tria mesh at Flat regions and ortho tria mesh at fillet areas.

• There are 122704 trias totally deployed for the entire model.
• 2D meshing is done for the Rear Mirror using given Quality criteria .
• The mesh is hollow inside.we can cut and see the model.The model should be as a solid so we should fill the hollow area with Tetra elements as avolume mesh.

VOLUME MESH GENERATION:

Step1:

To generate volume mesh first we should define the model manually and set a PID for the model.

• There are 4 parts in the model we should define the volume individual for each and every part.

Step2:

The defined parts we can check them in the lists.

Step3:

set the Quality criteria for the given model for generating volume mesh.Almost industries use tetcollapse for generating volume mesh to check the gap between the tria to check the tetra elements are not collapsing.

Step4:

For generating volume mesh we should fill with Tetra elements in the hollow areas.so,there are 2 types of Tetra elements:-

1. Tetra Rapid: This method will generate the Tetra elements which will not follow the path of the 2D mesh generated.it will just fill with tetra elements in the hollow areas.so the storage capacity is also less to generate Tetra Rapid mesh .
2. Tetra FEM:This method will generate the Tetra elements which will follow the path of the 2D mesh up to 2 layers and fill the remaining will fill like Tetra Rapid.so,the storage capacity and simulation time is more Tetra FEM mesh.

• The volume mesh should not contain any raised edges in the model.solve them by moving the nodes up and down .To check them you can use bounds ,it will control the visibility of single,triple and solid bounds as well.

Learning outcome:

• How to deploy 2D mesh with proper Quality criteria.
  
• how to deploy volume mesh for the model using solid elements.

Result:

The meshing for the given model Rear Mirror is done using proper Quality criteria.