Assignment 1-2D Meshing Challenge

AIM

Carry out the geometry cleanup operation on the given 3 files.

• Practice
• Clip Repair
• Mounting Bracket

There should not be any free edges, convert all of them into refine geometry.

• Clean the geometry.
• Extract midsurface.
• Clean midsurface geometry.
• Ignore holes less than dia 5mm.
• Create 2D mesh with target length 5mm, min 3.5mm max 7mm.
• And assign proper thickness, by creating a generic property.

• Then Save in .hm format.

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 three models so take the part one by one.So first we can take first model.
• we have to clean up the given model by removing the holes and unfilled surfaces (Geometry>quick edit>fill hole)
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• Toggle the free edges within the model which shows red lined.
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• Delete the unwanted surfaces which are coincide with each other
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• Delete the dulicate surface present in the body(F2)
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• We have to take midsurface of the given model.so go through thefollowing steps(Geometry>midsurface>select surface>extract)
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• 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)
• Fill the hole which have diameter below 5mm as given below.
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• Select the surfaces and mesh by using automesh tool.(2D>automesh>select surface>mesh).
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• We can adjust the no of nodes on the edges by right click/left click and give the good mesh flow
• 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.
• 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
• Do the same steps for all three models.

FINAL MODELS

RESULT

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