Week- 5 - Solid meshing

A typical CAE process comprises of preprocessing, solving, and postprocessing steps. In the preprocessing phase, engineers model

the geometry (or a system representation) and the physical properties of the design, as well as the environment in the form of applied loads or constraints. Next, the model is solved using an appropriate mathematical formulation of the underlying physics. In the post-processing phase, the results are presented to the engineer for review.

ANSA

ANSA - Stands for Automatic net generation for stuctural analysis. ANSA is an advanced multidisciplinary CAE pre-processing tool that provides all the necessary functionality for full-model build up, from CAD data to ready-to-run solver input file, in a single integrated environment.
ANSA is the users’ preference due to its wide range of features and tools that meet their needs. The list of productive and versatile features is long and the alternative tasks and processes to be completed using them are countless.

REAR VIEW MIRROR

A rear-view mirror (or rearview mirror) is a flat mirror in automobiles and other vehicles, designed to allow the driver to see rearward through the vehicle's rear window (rear windshield).

In cars, the rear-view mirror is usually affixed to the top of the wind shield on a double-swivel mount allowing it to be adjusted to suit the height and viewing angle of any driver and to swing harmlessly out of the way if impacted by a vehicle occupant in a collision.

The rear-view mirror is augmented by one or more side view mirrors, which serve as the only rear-vision mirrors on trucks, motor cycles and bicycles.

• Open the hood rear view mirror from the files and it must be carried out for several operations .
• Check the geometry of the model from the 'checks' and execute the operation by selecting required check parameters .
• Fix the geometry manualy or by means of auto fix (geometry clean up ) .
• Measure the thickness of the component by measure command .
• Give proper given quality criteria to the model.

• Give the minimum length of 0.5 and maximum length of 2 .
• Give the mesh parameters as per the given criteria .
• Give avg target length in classic mesh option by using perimeters /length .

• Give proper meshing to the components by using spot mesh from mesh generation in classic mesh .
• Use Ortho tria for curved surfaces and tria for curved surfaces .
• Complete the meshing by using ortho tria and tria .
• Improve/smooth/reconstruct the mesh to attain a good mesh flow.

• Define Volume for the mesh by using volumes/define from volume mesh option .
• Give tet collapse value in quality criteria as 0.2 and check for the collapse .

• Clear all the off elements generated by improve/fix quality from V mesh .
• Clear all the kinks , raised edges and other errors .
• Save the file by using a proper name .

LEARNING OUTCOMES

we have learned to do tetra mesh by using ortho tria and tria by giving proper quality criteria for solid meshing.

V mesh/spot mesh/ortho tria /enter for curved surfaces

V mesh/spot mesh/tria/ enter for flat surfaces.

for defining the volume , V mesh/define/enter

remesh the all un meshed volume by right clicking .

For quality improving V mesh/improve/fix quality .

smooth/reconstruct/move options can be used as the need .

CONCLUSION

Performed the tetra Solid meshing for the rear view mirror as per given quality criteria by using ANSA and learned lot about the new commands in solid meshing.