Week 3 - 2D meshing for sheet metal

Aim:

For the given Hood model, Take the mid surface for all the components after checking the geometrical errors and mesh the mid surface with the given element Quality criteria,

S.No	Quality Criteria	Value
1	Target/Average length	5
2	Minimum Length	2
3	Maximum Length	7
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
10	Tria Percentage	15

Initially the model has to be downloaded from the challenge and open in the ansa software using open command,

After exporting the model given under the geometry analysis has to be done when it is imported there might be some errors and has to be correct and start meshing, To check the surfaces are properly faces - topo tool is used each component. nect check the geometry, checks - geometry, most error will fix automatically, next orientation of all faces by faces - orient.

Then thickness of the each component is measured using utilities - measure. the outer panel and inner panel can be found 0.75 mm thick and the latch and hinges to be 1.2 mm.

The mid surface is extracted using the offset tool by faces - offset and selecting all the surface, faces - set pid by extracting all mid surfaces are extracted and property for all the component.

use utilities - mesh parameters, the target lemght minimum and maximum length are configured. utilities - quality criteria, and quality criteria file is saved as in image.

The mid surface for meshing is to switch the module altered going to perimeter - length and all the cons are target length 5 is as value. macros - join tool, and divided into sections,

macros - cut and macros - project tool, gives better quality mesh.

mesh generation - best tool this generates the algorithm applicable, the created mesh refined using shell mesh - reconstruct tool.

Then grid - paste, elements - split, elements - swap, elements - join, using these commands fix the mesh,

Finally after the mesh are clearing in mirrored for outer panel by utilities - transform - copy, then use utilities - quality - criteria - presentation parameters .

The 2D meshing of given hood model has been done and all elements pass the quality criteria.