Week 3 - 2D meshing for sheet metal

Aim:   To generate a mid-surface and to create a mesh for the given hood model. 

Procedure: 

        step 1: Imported a cad model and made sure it is in readable format( STEP / IGES / STL) 

        step 2: Performed geomtry clean up for individual part id and made sure that all the errors are removed.

        step 3: Performed orientation on faces of each individual part id 

        step 4: Generated a Mid-surface to each individual part id by using  offset command from face section.

•   Measuring the thickenss of the components  to make sure that the thickness is uniform to obtain mid surface.        

               

•         By using offset and also enabling feature option for selection of the face.
•         Entering the offset value which is half of the thickness of the geometry and also giving the direction for offset. 

                 

•      Mid surface is  generated 

                

•  Same procedure is followed to all respective PID

      Step 5: Created the new PID for each midsurface.

• By clicking on property ID then right click on the  menu 
• New> Pshell>Pshell

       

• Also assigning the thickness as same as geometory

      

•  Same procedure is followed to all respective PID

    Step 6: Setting up the given quality criteria

      

•  And also setting up  mesh parameter.

      

    Step 7:  Generating the mesh.

• Selecting the face to mesh the surface.
• Using best mesh from the option to mesh the face.
• Also performing Re-contruction on the face in order to re-arrange the mesh to obtain a better quality.
• Avioding opposite  trias and also on edge as well as on fillet by using split and past option.
• Performing smooth operation in order to get smooth flow of mesh and also helps in  eliminating the mesh quality failure.
• If the geometry is symetric we can mesh on side of the plane and perform transform option in order save time and energy.

              

             

       

   Step 8: Fe- Model enabling thickness

     

        

   

Learning Outcomes:   

        The learing outcomes from this model.

• Learned how to reslove errors from geometry clean-up. 
• Learned how to extract mid-surface using feature selection option.
• Learned how to achive uniform mesh surface .
• Learned how to eliminate mesh quality failure .
• Learned how to capture the feature area as well as fillet of the geometry
• Learned how to recognise the difference between the geometry line and the construction line.
• Learned how to eliminate mesh quality failure occuring due to features in the geometry.
• Learned how to eliminate tria by using split and paste operation.

Conclusion:

•  From this project i was able to use lot of commands and also how to defeature in some of the areas to avoid mesh quality failure.
•  Sccuessfully meshed the given hood model according to the given quality criteria.