How to skip the element check in abaqus ?
How to skip the element check in abaqus ?
(OP)
Hi to all experts,
I have another hot topic for you !!!
I have a question about the element check in abaqus. When i run a model done by another person i got an error message like ErrElemVolSmallNegZero this is because of element quality. It is ok so far but they claim that it is possible to run this model and the model, the model is working ok and there is a way to skip the element check. Do you think that it is possible to skip the element check in abaqus and how? I run the model in abaqus 6.7.4 and i also have other versions of abaqus too lastly it didnt work with 6.5.6 either.
Thanks
I have another hot topic for you !!!
I have a question about the element check in abaqus. When i run a model done by another person i got an error message like ErrElemVolSmallNegZero this is because of element quality. It is ok so far but they claim that it is possible to run this model and the model, the model is working ok and there is a way to skip the element check. Do you think that it is possible to skip the element check in abaqus and how? I run the model in abaqus 6.7.4 and i also have other versions of abaqus too lastly it didnt work with 6.5.6 either.
Thanks





RE: How to skip the element check in abaqus ?
RE: How to skip the element check in abaqus ?
RE: How to skip the element check in abaqus ?
If you have just a sprinkling of illegal elements within a large tetrahedral mesh (away from regions of interest) then the effect of removing these elements will most likely have a negligible effect on the validity of the solution.
However you have now stated "i have a lot of errorenous elemnets". Unfortunately this renders the model as not just useless but also positively dangerous! Your only correct course of action is to ditch this model and build a good one, at least on moral grounds, and most probably on legal grounds as well!
Just how experienced are those "more experienced engineers" ?
RE: How to skip the element check in abaqus ?
If there are more bad elements than you can fix in a few hours it is a bad model and should be viewed with extreme caution. That kind of sloppiness is often a sign of other problems in the model like bad boundary conditions etc.
gwolf
RE: How to skip the element check in abaqus ?
RE: How to skip the element check in abaqus ?
Then do that!
NEVER bypass an element check, even if it is possible.
I agree with gwolf2, if the original modeller didn't bother to check the validity of the mesh then I would have little confidence with the rest of it.
I use software which can automatically check and correct element Jacobians by manipulating the mid side node positions (coarsely meshed holes can end up with a facetted appearance looking like a 50 pence coin or thrupenny bit), very often this will make a bad element with excessive curvature become good. However this routine will not revive something like a nearly flat tetrahederal element, in which instance you must reposition one or more vertex nodes and then run the risk of corrupting adjacent elements! I've done this for a few elements in models in the past, but it is better to re-mesh the part.
RE: How to skip the element check in abaqus ?
Yes - it's always mid nodes on fillets and holes because someone can't be bothered to seed these surfaces/curves tidily prior to TET meshing.
gwolf
RE: How to skip the element check in abaqus ?