Plate buckling

Replies to This Discussion

Permalink Reply by Karamba3D on November 13, 2017 at 12:24pm

Hi Balaji,

yes it is. For details please see the manual.

Best,

Clemens

Permalink Reply by Balaji Visvanath Bheeman on December 1, 2017 at 5:28am

Hi Clemens,

Thanks for the response.
I happened to create a simple definition for a plate meshed using shell elements and applied standard boundary conditions (plate (XY plane)simply supported at the periphery; compressive forces applied in plane along one direction (X axis)), to check and understand the functionality.

I get an error as follows though.
„There are no defined second order NII forces..“

I do not have the definition file in hand at the moment and could share it sooner.
Is this error typical?
Am I missing some key info in here?
I happen to notice info in the manual about beams and N11 forces, while reading it.

Kind regards,
Balaji.

Permalink Reply by Karamba3D on December 4, 2017 at 12:42pm

Hi Balaji,

in order to do a buckling analysis in Karamba one needs to supply normal forces NII which form the basis of the geometric stiffness matrix and thus the linear buckling analysis in.

The easiest way to generate the NII forces is to do a second order theory analysis using the 'AnalyzeThII'-component prior to plugging the model into the 'Buckling Modes'-component.

Best,

Clemens