I was wondering if someone could help me hex mesh this component...mainly interested in the work flow i.e. how would one go about partitioning the solids etc. When working with solids, I usually prefer to do an extrude of a surface mesh. I am attaching the step file.
Also, just curious, how can I update solid element CSYS orientation in Femap?
Use the Meshing Toolbox and create a "Pad" on one of the small holes -
Use Geometry - Solid - Embed Face and embed the four pad faces into the entire solid -
Now, some regular slicing - now 32 separate solids -
Set Mapped Meshing Approaches on the 8 Pad Surfaces on the end and
Size for Hex Meshing -
Hex Mesh -
And, if we mesh the top four corner surfaces before hex meshing with the "Max Quads" option turned on, we can remove the couple of triangles and make sure there are not wedges in the following hexa mesh -
With some more mesh control -
Attached file contains a v11.3 Neutral File of the above model.
As add-on to Mark post using the general method I want to show a simply meshing approach that I use a lot with HEX meshing: the great MESH >SWEEP >ELEMENT command + MODIFY > ASSOCIATIVITY > AUTOMATIC command.
1.- SOLID SLICE your 3-D model to take advance of 1/8 symmetry. Also use comannd GEOMETRY > CURVE-FROM SURFACE >SLICE to imprint the hole solid with curves after slicing with two planes.
2.- Perform a mesh sizing and 2-D mesh using the MESHING TOOLBOX, the idea is to extrude 2-D QUAD elements to genertate 3-D SOLID HEXA elements.
3.- The small hole region is the most complex: the extrusion is not possible, then use 2-D QUAD Mesh of both TOP and BOTTOM regions with command Mesh, Geometry, HexMesh from Elements...
HexMesh From Elements provides two ways to create a hex mesh out of mapped surface quads. A hexahedral mesh can be created from a fully enclosed outer bound of mapped surface quads or between a bottom and top mapped region that is connected with straight lines.
The result is this excellent HEX mesh:
4.- For the other region use command SWEEP: select the surface 2-D mesh and next sweep them along the two curves to form the new 3-D solid elements, all in one operation!!.
The resulting mesh will have an exceptional quality. Don't forget to use command TOOLS > CHECK > COINCIDENT NODES to merge ALL coincident nodes, OK?.
5.- This is 1/8 PORTION, simply use command MESH > REFLECT > ELEMENT to repeately recreate the full 3-D model.
And of course, to finish do the following:
Hope it helps!!.
Thanks for the replies. Learned a thing or two from your responses. I was able to Hex mesh the part after slicing, but the refinement level, especially near the details was not as good as above ones.
To learn more go to my BLOG and search for HEX MESHING, here you are: