Week 5

Aim and Objective:

• To clean up the geometry.
• To mesh the given component according to given quality criteria using ortho trias and trias to capture the surfaces without any knicks and raised edges
• To perform the volume mesh after FE modelling the given geometry with tria elements and check-in the volume meshed component for tet collapse.

Procedure:

• Import the geometry.

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• Perform topo using topo tool under faces menu.

• In ANSA if geometry contains two colours then the geometry is inconsistent.
• The component should follow the colour pattern grey indicates positive, yellow indicates negative in ANSA colour is an entity.
• To maintain a single colour pattern the orientation is used.

• After changing the orientation the geometry checkup is to be performed using the check manager.

• Using manual fix and auto fix clear all the geometric errors present in the model.

• Check whether the geometry contains single component or multiples components if any found using boolean operation and lock view manager separate them and save the lock views as a separate component.
• Now set the model for target length 1 by using length option under perimeter in the mesh tab.

• After setting the model for target length insert mesh parameters and quality criteria for tri shell meshing.

• Measure the narrow fillet regions.

• As we can see in the picture that the above fillet is failing for minimum length criteria so we have to defeature the fillet

• Under faces using dach we can remove those fillets.

• Now mesh the curved regions in the geometry using ortho trias, The ortho trias will capture the curved regions properly. Flat regions using trias.

• If any elements are failing then reconstruct the mesh and make the mesh-free from failed elements.
• Follow the same procedure for all the three components. Mesh remaining components by the same strategy.

• After meshing all the components under the volume mesh tab define the property for the FE model as PSOLID and remesh the model using tetra mesh.

• After meshing all the components using tetra mesh check the elements for tet collapse.

• Zero elements are tet collapse.

Outcomes:

• The concept of tetra meshing and assigning the property for the volume mesh is understood.
• Different tetra mesh algorithms are understood.
• How to clear the elements which are collapsed is understood.

Results and conclusions:

• The given component is successfully meshed using trai elements.
• The volumes for the FE model is assigned successfully.
• The given component is meshed successfully using tetra elements.

https://drive.google.com/file/d/1oQL45x3PJanbWeN4pwEkE28Op7tTK3lc/view?usp=sharing