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Meshing a block with spherical void inside in Ansys
Sat, 2010-05-22 15:52 - sidd04mech
I have a squre block and inside it there is an sphere. I want to mesh
the whole assembly. I can mesh the sphere but when i try to mesh the
squre block with the spherical hole it cant mesh and says "it cant
select the source and target face". I also tried to devide it into 8
parts. That helped me to mesh the sphere but i cant mesh the squre with
spherical hole with that too. So please anyone can help me out.
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Meshing a block with spherical void inside in Ansys
You are trying to use sweep mesh command. The sweep is applicable only when the source face is identical to the target face. If both are different then it will not be possible to mesh it with sweep option.
Try using tetra mesh.
or divide in a way thats makes the source and target are identical. (If u feel both faces are identical then try using the pic src/trg option in sweep, sometime auto pic wont work.)
Meshing a spherical void in a cube
If you really want to use hexahedral elements, I've always liked the idea of partitioning the sphere's surface into six regions by projecting the edges of the surrounding cube radially toward the origin of the sphere. One could then define volumes by connecting these partitions to the faces of the cube, and then simply use a mapped mesh technique. Has anyone tried this and had success? I tried it in ABAQUS/CAE a few years ago and gave up too soon.
Matt Lewis
Los Alamos, New Mexico
Meshing a spherical void in a cube
Many years ago I used the mapping idea in Truegrid to mesh one sphere in a cube with hex elements. The mapping idea breaks down when there are numerous spheres. I found quadratic tets to work reasonably well for linear elastic problems. Newer tet technologies might work well for large deformation problems too.
My solution was to ditch FE and go to particle methods for such problems.
-- Biswajit