Discontinuity Across Shell elements (APDL)

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  • Last Post 05 May 2020
SofiK posted this 22 April 2020

Hello,

I preformed a static structural analysis using Ansys Workbench.

I have been trying to export stresses using APDL commands from a geometry, which is constructed of shell elements (SHELL181).

The geometry is a multi-body (of shared topology mid-surfaces) and the stresses were extracted by PRNSOL command.

As I export the stresses, I see a discontinuity in them in the connection line between the components, as shown in Image1.

The stresses in the workbench are OK and I don't see the same phenomenon, see Image2.

I have tried looking at different layers of the shell (Top, Bottom) but there it still acts the same in the contact between the mid-surfaces.

When I look at each mid surface in the workbench desperately, I don't see anything unusual.

If anyone has an idea how to solve this - please let me know. Thank you

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Aniket posted this 24 April 2020

Ansys staff can not download images in the attachements on the student portal, so if you want to reach a larger audience to get answers from, please insert the images inline.

Being said that, are your shells of same thickness?

-Aniket

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SofiK posted this 24 April 2020

Here are the images reattached for your convenience:

Image1:

 

Image2:

Image3:

Aniket posted this 26 April 2020

I am not sure if I understand your image1 which software are you using for that?

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SofiK posted this 29 April 2020

The shells are of the same size. I use Ansys workbench, Mechanical. I export the data and visualize it in Matlab, but it has no effect on the problem, of course.

Aniket posted this 30 April 2020

Please try to export either Top or Bottom position results and see if you see the same discontinuity. You are currently exporting (top/bottom)

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SofiK posted this 05 May 2020

I have tried exporting Top and Bottom separately, the discontinuity remains in both cases. Is there another option I should consider to solve this?

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