Modelling of an Car Hood using HYPERMESH

https://drive.google.com/drive/folders/1Xx6qfNdp2Qr1E5SAlfsXFOnXXg3nHSRb?usp=sharing

OBJECTIVE: To mesh the given hood component and assign thickness of 5mm with the below mentioned quality criteria.

Sl No	Quality Criteria	value
1	Aspect Ratio	5
2	Skewness	45
3	Warping	15
4	Taper	0.5
5	Min Length	2
6	Max Length	8
7	Min angle Quad	45
8	Max angle Quad	135
9	Min angle Tria	20
10	Max angle Tra	120
11	Tria %	10

PROCEDURE:

• The hood file is imported
• Deleting the solid surfaces by selecting full model and deleting.
• Geometry clean up as been done separately for each part using the quick edit option like if any lines are too close so that we can’t satisfy the minimum element size that lines are toggled or merged to one line by replace point.
• After geometry clean up midsurface is extracted separately for each part.
• If any surface as to be edit then using quick edit option is used to clear and editing the geometry.

• The above figure shows the example of outer extract surface of toggling the unwanted lines i.e, the dotted lines on the above figure and new lines are created so that mesh flow becomes good
• Using the 2D-automesh option mesh is created on each part separately and in each part meshing as been done separately for each surface so that if any elements fail we can clear that easily step by step.
• After meshing each part using quality index option elements failed are checked and correcting the mesh by clean up tools like element optimize, place node, dragging the tria elements or splitting the quad elements etc.,
• While meshing, this are the things I followed, there should be zero elements failure according to the given quality criteria, feature capturing, mesh flow.
• Other than above criteria main thing is managements 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 feature etc.,
• By following the above steps all the parts are meshed with given quality criteria.

• after meshing the hood component is shown in the above figure

CONCLUSION:

By satisfying all the given quality criteria the given component is meshed and tools used are quick edit, automesh, smooth, quality index, rebuild mesh, mask, delete, reflect, project, edges, split, align etc.,