Problem in generating HEX mesh

[satyasrinivas]

Hi

I am attaching CrackTrail.cae file for perusal. I want to mesh the 'Main' solid part in the model with quadratic hex mesh. For some reason, CAE is not allowing that.

Eventually I would like to do define a crack in the model and so I need HEX mesh for the solids. Is there anyway I can get around this problem and generate a HEX mesh for the solids.

Thanks in advance.

 

[CharlesRobert]

Hi,

In my point of view, it could be better to use tetra- not hex-

 

[corus]

The partitioning I've done doesn't give a very good mesh, but it's a hex mesh. There's probably a better way but the elliptic surface doesn't help any.

corus

 

[johnhors]

satyasrinivas - you should know that only relatively simplistic volumes can be meshed with hex elements. Whilst any valid volume of any degree of complexity can be meshed with tetrahedral elements, you will have to partition your volume as Corus has proved into less complex volumes that can be meshed with hex elements. As Corus hinted the hex mesh using his partitioning doesn't generate the best quality elements, so then it is up to you to follow Corus's lead and see if you can partition the original solid in such a way as to generate acceptable quality hex elements.

For hex meshing there is no "magic bullet", a true 100% quality hex mesher for complex volumes (though others may disagree!), those meshers that do claim to do this all have their short comings.