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Getting different 1st principal stress results with apdl script and workbench

Getting different 1st principal stress results with apdl script and workbench

Getting different 1st principal stress results with apdl script and workbench

(OP)
Hi

I have a simulation where i use a *get command to extract stress from a specific node. When i check my result with the "Maximum Principal Stress" using a stress probe option in the vertex at the node, i am getting a different result. the GET command used is:

CODE --> apdl

*get, HS_10, node, HS_nodenum2, s, 1 
both results are sampled at the last timestep. The results are:
  • 0,99784 for the GET method
  • 0,99873 for the probe method
Why is that? Are they calculated using slightly different methods or something?

Thanks in advance
Best regards BTHS

RE: Getting different 1st principal stress results with apdl script and workbench

(OP)
Hi L_K

Thank you for your input! I just checked, they both output the same 3.3986e-002. Using the following command:

CODE --> apdl

*get, my_04, node, HS_nodenum1, U, sum 

and the "Total deformation" on the vertex at the same node.

RE: Getting different 1st principal stress results with apdl script and workbench

Hi BTHS,

*GET command retrieves averaged nodal results based on selected elements. Were all elements selected before *GET?

The difference is small, could it be due to graphics algorithm?


Thanks,
Jason

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