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Orthotropic plate under pressure with SOL601

[ Edited ]

I compare bending of a 150x100 ortotropic plate with SOL101, SOL601 (Adina) and SAMCEF.

The plate is supported by 4 corner nodes and a pressure is applied. The material orthotropy axis is the diagonal.

If SOL101 and SAMCEF give similar shapes, Adina shows a different behavior that doesn't looks coherent with orthotropy. Sim and Fem files are attached, did I make a mistake?

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Accepted by topic author JPDelsemme
‎11-15-2015 03:57 AM

Re: Orthotropic plate under pressure with SOL601

I passed this on to Adina and this is their response:

 

I see now why the deformation shape is like what SOL 101 gives due to the very high E1/E2 ratio.

 

It looks like the ADINA 3-node shell is too stiff due to locking. If a much finer mesh is used, the results would be similar to SOL 101. Attached is a sample input file.

 

We will continue to investigate this problem with our 3-node shell.

 

I split the original elements twice to achieve a finer mesh.101 vs. 601 results: