numerical fault between pyansys and Mechanical APDL GUI

- March 10, 2024 at 1:11 pm
  
  abc164
  Subscriber
  
  i use ansys to solve structural problems. structure is simple , basically consist of several planes. I use pyansys to study differet input geometry's influence to results. BUT i find numerical fault between pyansys and Mechanical APDL GUI. such as S1 (1st nodal principle stress ). i get S1 by code "mapdl.post_processing.nodal_principal_stress" in pyansys. i get S1 by order path "general postproc/plot results/ contour plot/ nodal solu/1st principlt stress" in Mechanical APDL GUI. these two S1 value are just different. need kind man to tell me the reason why they are different.
- March 11, 2024 at 2:52 pm
  
  Mike Rife
  Ansys Employee
  
  Hi Hao
  Please see the Mechanical APDL Help on the /graphics command. Mechanical APDL by default uses 'Power' graphics when running MAPDL interactively. PyMAPDL is showing data as 'Full' graphics. There are differences in how the node shared data at elements is handled with respect to averaging between Power and Full graphics. So it is not really a fault; just a different way of presenting the data.