Project 1 - 2D meshing on the instrumental Panel

Project – Modelling of an Instrumental Panel using ANSA

Aim – For the given component, checking the geometrical errors and mention the model with given quality criteria after missing thickness as to be assigned.

Quality Criteria –

S. no.	Quality Criteria	Value
1	Target/Average length	4
2	Minimum Length	2
3	Maximum Length	6
4	Aspect	3
5	Warpage	15
6	Skewness	45
7	Jacobian	0.7
8	Minimum Quad Angle	45
9	Maximum Quad Angle	135
10	Minimum Tria Angle	30
11	Maximum Tria Angle	120
12	Tria Percentage	15

Procedure –

1. Importing the given file. As the given model is instrument panel i.e, plastic component it can be meshed using 2D shell elements, before meshing the geometry clean up as to be done and then mid surface extraction is done.
2. First the geometry checks are performed using tools -> checks -> Geometry and clicking on the geometrical problems of the model such as unchecked faces, needle faces, collapsed cons, triple cons, overlaps, single cons, and cracks. Clicking on the execute option and finding the errors in the errors in the surfaces. If any errors found that has been cleared using the automatic fix option or manually cleared using the topo options.
3. After clearing the geometrical errors thickness measurement as taken randomly as it is different thickness all over the component so mid surface is extracted using Topo -> faces -> offset -> faces. Selecting the faces on any one side and giving the offset value of exact middle and creating the mid surface or by creating the curves on the middle surfaces and creating the new surfaces using that curve and extending to the surface.
4. After creating mid surface selecting the whole mid surface and stored the mid surface using lock -> store lock option.
5. Again, the geometrical errors need to be checked for the mid surface using the tools -> checks -> geometry and clicking on the geometrical problems of the model such as unchecked faces, needle faces, collapsed cons, triple cons, overlaps and cracks. Clicking on the execute option and finding the errors in the mid surface. If any errors found that as been cleared using the automatic fix option or manually cleared using the topo options.
6. After clearing the mid surface errors the given quality criteria values assigned using the quality criteria option selecting as per challenge requirement provided and adding the values to it and in mesh parameters giving target length, min length and max length values.
7. Using mesh option mesh generation -> best -> select, options mesh. Repeat the procedure for entire model. For mesh correction use mesh -> mesh generation -> reconstruct -> select, options are used for good meh and get the mesh flow good smooth option is used.
8. While meshing, these are the process repeated, there should be zero elements failure according to the given quality criteria, feature capturing, mesh flow.
9. Other than above criteria, management of trias like no tria should be on the corner or edges of geometry, no opposite trias, no back to back trias, no rotational quads, no tria should share with any of the features etc.
10. After completing the mesh for assigning the thickness mesh -> macro -> set PID -> selecting the faces -> clicking on the right click -> new -> Pshell -> giving the thickness value -> then press OK.

Learning Outcomes –

1. Learnt the geometry errors fixation for complex components.
2. Learnt to extract the mid surface for complex components.
3. Learnt to do the meshing in complex area’s by creating the new lines for closed set of lines where minimum element length going to fail.

Conclusion –

As per given objective geometry, clean-up has been done, and as per given quality criteria, the given model is meshed accordingly, and thickness is assigned for each part. Tools used are property, checks, mesh parameters, quality criteria, transform, measure. For selecting any surface or faces ENT, PID, Macro Area, featuring options are used according to the requirements. For masking and unmasking the surfaces or, and, not, into, all, invert, lock, nieghb option are used. In topo model insert, delete, weld spot, release, cut, delete, set PID, topo, project cut, Rm Dbl, offset, orient, fine etc., In mesh module insert, delete, number, num+/-, length, slide, cut, edge2peri, move, best, remesh, batch erase, map, smooth, reconstruct, split etc.

ANSA model – Google Drive

https://drive.google.com/file/d/1WiqpJ4a6B7o-0ub718_kYwpM5qvGM4rm/view?usp=sharing