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Linear Buckling and Symmetry

Linear Buckling and Symmetry

Linear Buckling and Symmetry

(OP)
Hello,

I'm working on the buckle analysis of a piece of sheet metal withstanding an axial load. The part is symmetrical to a plane but the geometry is pretty simple and computational power is not a problem so I started modeling the whole with shell elements. Then I tried to model only the half to get symmetrical and antisymmetrical modes (2 separate analysis with different BCs), and got very different results from the original. Which ones should I consider to be reliable ?

Thanks

RE: Linear Buckling and Symmetry

Yes, if you find you got different results when you use full model and half model under the same circumstance, I think we are in the same trouble, I am also sincerely ask for help from someone who know the trick of this.

I got a similar problem, for a simple bar under compression, and since the bar is just a straight one, and I just simplify the model as half length and set symmetry boundary condition at one end to make it only half of the whole body, and got a result, then, I found it is not time consuming, so I change it to full length, but the result is so disappointed, even cannot give me a reasonable deformation contour, and all the thing is just the same.

So, please help us, all friends in this forum, your response is highly important for us!

Best Regards,
Kyle

RE: Linear Buckling and Symmetry

Unless your bucking mode is similarly symmetric, symmetry is strongly discouraged in a bucking analysis.

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