mesh generation failed! imprecise vertices? Help needed (pics attached)

[sarveshspace]

Hello ,
I am trying to hex mesh a foam part as shown. When i try to mesh i get the mesh generation failed due to a problem in the propagation of mesh seeds error. I go to query- geometry diagonistics and find two imprecises vertices. Are they causing this problem? How to fix this?
Thanks!

 

[Dave442]

Can you try to use virtual topology to ignore the problematic vertices?

 

[corus]

There are various ways of fixing geometry in the part module by merging edges, stitching, removing redundant entities etc. Try this first. If you use virtual geometry then you'll be restricted to using tet elements which shouldn't be necessary.

 

[Dave442]

@corus - virtual topology doesn't restrict you to tets.

I've used it to remove redundant vertices from parts which I then hex meshed. Here's the blurb from the users guide:

Abaqus/CAE does not support all of the meshing techniques on regions that contain virtual topology. Specifically, Abaqus/CAE does not support the following:
[ul]
[li]Two-dimensional free meshing with quadrilateral or quadrilateral-dominated elements using the medial axis algorithm.[/li]
[li]Three-dimensional swept meshing using the medial axis algorithm.[/li]
[li]Two-dimensional structured meshing if the region to be meshed is not bounded by four corners.[/li]
[li]Three-dimensional structured meshing if the region to be meshed is not bounded by six sides.[/li]
[/ul]