Week 3

Aim :

To 2D mesh the given car model Hood design in the ANSA pre processor software.

1. Import cad model into the ANSA software.
2. Extract the midsurface for the given model.
3. Check the geomentry for the given model before mesh.
4. Mesh the given model with the given criteria.
5. Check and clear the failed or off elemnts in the meshed model.

Procedure :

• Step 1: Import the given CAD model Hood to the ANSA software and select the nastran deck solver.
• Step 2 : After importing see the given model clearly and seperate the parts for the given model by using lock and boolean option.
• Step 3 : Now measure the thickness for the given model for each seperated part and store them.
• Step 4: Now we know the thickness, extract the midsurface using offset or midsurface skin option, here I am using the skin option because the seperated parts has a uniform thickness and skin option gives better result rather than offset.
• Step 5 : After extracting the mid surface go to the auxilaries and select the fine option to create the fine midsurface geomentry.
• Step 6 : Check the geomentry using checks and clean the all triple con errors before meshing the geomentry.
• Step 7 : Add property and material to the seperated geomentry parts.
• Step 8 : Now go to mesh and check whether all hot points are arranged according to the target element size or not, if not use length and spacing options to arrange the hot points.
• Step 9 : Add the criteria values using F11 option and apply it to the geomentry.
• Step 10 : Mesh the given geomentry step by step using the best alogorithm, to get good mesh flow and less oof elemnts try to clean geomentry using the cut option.
• Step 11 : To check failed elements using the hidden option and clear them using the reconstruct and smooth option. This is the mesh flow for the geomentry.
• Step 12 : Now paste the meshed elements to the mid surafce geomentry and save the file.

Results :

Thus the given car model Hood is meshed with the good mesh flow and criteria.

Conclusion : Thus learnt ANSA basics and how to mesh the given model with good quality criteria.

THis is the link for the above model files : https://drive.google.com/file/d/1R9hMZ5QfeVi9hv0sEQOUEfFE6LuyctBK/view?usp=sharing