negative eigenvalues

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negative eigenvalues

Abaqus Users mailing list
Dear Users,

I am running a linear buckling analysis on a simply supported beam and
after the analysis, I have got a  negative eigenvalue as a result. The beam
is contained shell (S4R) and beam (B31) elements to model the fillet radius.
Do you have any idea why I get negative eigenvalue?

Thanks,
Gabor

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