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Abaqus CAE- buckling analysis eigenvalue
my question is about how to use the Abaqus CAE eigenvalue for a linear buckling analysis.
I did a linear buckling analysis for a gFRP vertical panel (h:270 thick:20 w:50 cm). I applied a uniform pressure with value 1 on the top of the panel along the Z axis.
Mode 1 gives me an Eigenvalue of 52853 (please see the attachment). I know that in order to obtain the maximum buckling stress I should multiplicate the eigenvalue for the load appied. It means that the value for the buckling stress is 52853 (N/cm2).
If I compare this value with a simple Eulero calculation for the buckling load of a column (I assume the panel as a column) the stress obtained results to be 10 times higher than the one obtained with Abaqus.
Does anyone of you have an idea of the possible errors I did in my model?