Hexa meshing a complex part 1

[ninjaz]

Hello.
Is there any easy procedure to do hexa meshing for a complex part. Is there any manual available online for doing hexa mesh for complex part.
Or just i need to know whether my CAD can be mesh with hexa hedral elements.. the attached image is mostly similar to my CAD.

 

[corus]

Normally it's not recommended, but for such complex geometry you're probably better off using tetrahedral meshing, otherwise you'll have to break the part down into more manageable bits that each can be meshed using hex elements. That may be a very time consuming affair. Bear in mind that the geometry is symmetric and if your loads are similarly symmetric then you can reduce the model by half, which will save on memory and run-times.

 

[ninjaz]

yes, of course .. it is a symmetric geometry.. whether it(hexa) is not recommended because of time consuming or some other reasons?

 

[dangermx]

I recommend to mesh it in thetraedral elements of second order, hexa meshing is ideal but thetraedral mesh also give good results, hexa meshing is a lot of work to do, and it depends of your accuracy and experience on meshing parts.

 

[davemechuk]

To create a mesh with Hexa elements for that kind of geometry you would require to slice (or break down) your part into smaller sub-parts. The task of slicing this into a multi-body part of simple geometries will be time consuming. This is the only reason why Hex elements are not recommeded; otherwise I would always try to use Hex if possible.

Dave, Msc(Eng), AMIMechE
Graduate Stress Engineer
(3 Years left for Chartership!)