Week 6-Meshing of Hood Challenge

Aim-

To do a 2D mesh of given Hood assembly as per given data and to do a quality check as per given condition mentioned below,

 

Procedure-

• Intially we have to import the model given to us, for that go to import>>import model and then select file and click on import.
• The given hood assembly consists of 4 parts, viz. 1.inner extract, 2. outer extract, 3.hinge reinforcement extract & 4. Latch reinforcement extract

     

                                 Inner extract                                           Outer extract

   

         Hinge reinforcement extract                                      Latch reinforcement extract

 

• Now as per given we will go for meshing each component one by one.
• So, intially we will go for inner extract first.

Inner extract-

• Make Sure that current selected component is inner extract only.
• Now go to delete and remove all the solids present in the active model.
• Go to topology view and check for any geomerty errors in the model.
• Now go to mid surface and create mid surface.
• Now again check for the geometry errors in the generated mid surface and do cleanup if required.
• Now we can see in the below snap that the geometry is symetric from all side except the centre postion non highlighted.

• So, we can delete that portion and continue for meshing of half portion.

• Now do auto cleanup and of remaining half model and proceed for meshing with parts having least free edges.

Note- Set quality criteria before auto cleanup as per given in task.

• Before meshing do washer split of the for all curved surfaces, split the surfaces to make mesh flow constant.
• Now got to 2D and automesh, select element size as 5, mesh type mixed and select surfaces one by one.
• After final mesh go to quality check.
• check for equivalence, normals etc.

Outer extract-

• Make Sure that current selected component is outer extract only.
• Now go to delete and remove all the solids present in the active model.
• Go to topology view and check for any geomerty errors in the model.
• Now go to mid surface and create mid surface.
• Now again check for the geometry errors in the generated mid surface and do cleanup if required.
• Now we can see in the below snap that the geometry is axis symetric from all side except the centre postion non highlighted.

 

• So, we can delete that portion and continue for meshing of half portion.

 

• Now do auto cleanup and of remaining half model and proceed for meshing with parts having least free edges.
• Before meshing do washer split of the for all curved surfaces, split the surfaces to make mesh flow constant.
• Now got to 2D and automesh, select element size as 5, mesh type mixed and select surfaces one by one.
• After final mesh go to quality check.
• check for equivalence, normals etc.

 

• Now we will use reflect command to get half part of mesh & surface.

 

Hinge reinforcement extract-

• Make Sure that current selected component is hinge reinforcement extract only.
• Now go to delete and remove all the solids present in the active model.
• Go to topology view and check for any geomerty errors in the model.
• Now go to mid surface and create mid surface.
• Now again check for the geometry errors in the generated mid surface and do cleanup if required.

• Now do auto cleanup and of remaining half model and proceed for meshing with parts having least free edges.
• Before meshing do washer split of the for all curved surfaces, split the surfaces to make mesh flow constant.
• Now got to 2D and automesh, select element size as 5, mesh type mixed and select surfaces one by one.
• After final mesh go to quality check.
• check for equivalence, normals etc.

 

Latch reinforcement extract-

• Make Sure that current selected component is hinge reinforcement extract only.
• Now go to delete and remove all the solids present in the active model.
• Go to topology view and check for any geomerty errors in the model.
• Now go to mid surface and create mid surface.
• Now again check for the geometry errors in the generated mid surface and do cleanup if required.

• Now do auto cleanup and of remaining half model and proceed for meshing with parts having least free edges.
• Before meshing do washer split of the for all curved surfaces, split the surfaces to make mesh flow constant.
• Now got to 2D and automesh, select element size as 5, mesh type mixed and select surfaces one by one.
• After final mesh go to quality check.
• check for equivalence, normals etc.

Final Mesh Result-

1. Inner extract

2. Outer extract-

 

3. Hinge reinforcement extract-

4.Latch reinforcement extract-

Conclusion-

• We should first check the geometry errors and clear them manually, also we must toggle lines which are not required and which are very close to each other.
• We must take care of lines & Edges by which we are going to create mesh.
• We cannot ignore orremove trias at the curved edges and there should not be any back to back trias.
• We should maintain mesh flow with trias and quads, by that we can only get a good mesh of any part.