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[theo.camilleri]

[Aniket]

Your question is not posted for some reason, can you please re post it?

-Aniket

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[theo.camilleri]

Hi Aniket, not sure why it's blank but here's my question:

I have a structural model with SOLID186 elements. When I probe the nodal averaged stress at 2 adjacent corner nodes, the corner node stress results are 70 MPa & 53 MPa, while the midside node between them is probed at 60 MPa. From the theory manual, the midside node should be an average of the averaged corner node results, so in this case, 61.5 MPa. Why is there a difference between the result reported by Mechanical and the process shown in the theory manual?

Thanks,

[Govindan Nagappan]

Hi Theo,

Instead of using probe, can you export the midside node result data and check the values. You may need a command object to export the data. You can use PowerGraphics (/GRAPHICS,POWER) and turn on 2 element faces (/EFACET,2), which is valid for higher-order elements. You can list the midside node stresses with PRNSOL.  This could be redirected to a file with /OUTPUT command.  

Example commands (nodify the commands as needed)

/post1

set,last

/graphics,power

/efacet,2 

/output,my_result,txt,

prnsol,s,prin

/output

[theo.camilleri]

Hi Govindan,

That results in the expected output (nodal stresses are 70 MPa, 61.5 MPa and 53 MPa).

This is a minor difference between the result from APDL and Workbench Mechanical, but do you know why this is occurring? It would be good to know for future post processing.

Thanks.