Week 6-Meshing of Hood Challenge

OBJECTIVE

Follow the below-mentioned quality criteria, mesh the component given below and assign thickness:

Target Element Length = 5 Units

S.N	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
10	Tria %	10

CAD MODEL

PROCEDURE

• Open the hyperworks software.
• Select "import geometry" option and also set the file type format, then import the first model.(import geometry>model>open)
• Here we have four parts so take the part one by one.So firstwe can take inner extract part.
• we have to clean up the given model by removing the holes and unfilled surfaces (Geometry>quick edit>fill hole)
• Use surface tool to generate the surface for required area(Geometry>surface>rule)
• 
• We have to take midsurface of the given model.so go through thefollowing steps(Geometry>midsurface>select surface>extract)
• After midsurfacing , take the half of the model because this model is an symmetrical.
• 
• Do the geometry clean up by toggle edge where the minimum length criteria fails.(Geometry>quick edit>toggle)
• Divide the surface into different parts by using split-surface-line tool(Geometry>quick edit>split-surface-line)
• Give washer split with length 5mm.(Geometry>quick edit>washer split)
• Give quality criteria and mesh parameters as given in the question.
• 
• 
• Select the surfaces and mesh by using automesh tool.(2D>automesh>select surface>mesh).
• We can adjust the no of nodes on the edges by right click/left click and give the good mesh flow
• Use rebuild mesh for better result in mesh flow(2D>Rebuild mesh>select surface>rebuild)
• Clear the failed elements using the tools in quality index (2D>quality index)
• There are many tools in quality index section for fixing the failed elements.
• we can use element cleanup to fix the off elements (2D>element cleanup)
• After meshing the first half mirror the model by using reflect tool (Tools>reflect)
• Check wheather there is any free edges present within the body (Tools>edges)
• If there is any free edge present mesh fix it by using replace points(F3)
• 
• 
• 
• 
• Next step is to give thickness to the given components and assign meterial property.
• In order to give thickness to the shell elemets we need to create a property and give thickness of the component to the propert and assign the property to the mid-surface component and change visibility to 2D detailed element representation.

RESULT

Performed geometry cleanup and extracted mid-surface of Hood model and meshed the component with given element quality criteria and assigned thickness to the shell elements.