Unrealistic deformation in a linear static analysis

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  • Last Post 06 July 2019
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Oimpa posted this 05 July 2019

Hi,

I have a model that includes two parts solid and shell.

I've joined these two parts with merge nodes.

I want to do a linear static analysis on them.

After analysis, deformations are very small(0.3e-7).But in some places in the model, these two parts go inside or go apart.

While this does not happen, if I do a non-linear analysis on the same model with the same characteristics.

Is this a real deformation?

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peteroznewman posted this 06 July 2019

No, it's not a real deformation, it is just the deformation display scale that is set to a number much larger than 1.  When you run a non-linear analysis, the deformation display scale is set to 1.0.  I am a Mechanical Workbench user, so I don't know the APDL menu or command to change the display scale.

Oimpa posted this 06 July 2019

Thanks

jj77 posted this 06 July 2019

Yes, when nlgeom, on is active so large displacement is on then deformation scale is 1. /dscale, all, 1 command can set that.

We are all using apdl, just different pre and post processors (ansys classic gui or wb gui).

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