Week 6-Meshing of Hood Challenge

Aim: To mesh the component according to the quality criteria given and assign thickness.

1. The quality criteria to be followed:

S.No	Quality criteria	Value
1	Aspect ratio	5
2	Skewness	45
3	Warping	15
4	Taper	0.5
5	Min. Length	2 units
6	Max. Length	8 units
7	Min angle quad	45
8	Max angle quad	135
9	Min angle tria	20
10	Max angle tria	120
11	Tria%	10

Target element size: 5 Units

Different parts of the component:

1. Inner extract
2. Outer extract
3. Hinge reinforcement extract
4. Latch reinforcement extract

Procedure:

• The component is first imported into hypermesh.

• Midsurface is to be obtained for every part of the component and meshed individually.
• First the inner extract is made active by choosing "make current" option.
• Rest of the parts are hid and then by selecting the required surfaces, the midsurface is extracted.
• The midsurface is renamed.

• Now the solids are deleted from the component.
• Using quick edit option excess points are removed from the midsurface.
• The component is divided into two halfs in such a way that one half is the mirrored image of the other and masked.
• One component alone is not symmetric hence it is not masked.
• The component is separated into sections by the use of quick edit option.
• The meshing of the component is done by sections and the sections are chosen accordingly which as lower free edges.
• The mesh flow is to be maintained according to the geometry of the component.
• Triangular elements are to be avoided in most cases if possible.

• Now the other half of the part is unmasked and the elements are reflected to the half.
• Using equivalence option, the entire component is checked for equivalence.
• The remaining surface is also meshed and checked for equivalence.
• The component is checked if it satisfies all the quality criteria in the "qualityindex" option.
• Similar procedure is repeated for outer extract, hinge reinforcement extract and latch reinforcement extract.
• Thickness is assigned to the midsurfaces after measuring the solid component.

After Meshing:

Inner extract:

Outer extract:

Latch reinforcement extract:

Hinge reinforcement extract:

Result: The Hood model has been meshed according to the quality criteria given and thickness is assigned.