Reply To: Difference between Normal Stress in X-axis in Mechanical and Stress S1 in ACP

[Elias]

Hello Lydia,

Thank you very much for your answer.

I tried the Elemental Mean Display Option in Mechanical (fig. 1) and the discrepancy compared to ACP’s results (fig. 2) is 1.44% instead of 2.92% for the Averaged Display Option (fig. 3). So, the difference is lower but still exists.

I went a bit deeper and plotted the results of Mechanical APDL for the corresponding Element Solution (fig. 4) and Nodal Solution (fig. 6) with Graphics set to Full (not Power). The maximum and minimum of the Element Solution Results from Mechanical ADPL are the same with the Results from Mechanical using the Unaveraged Display Option (fig.5), as expected, but the maximum of the Nodal Solution Results is 10MPa lower than the maximum from Mechanical using the Averaged Display Option (fig. 2). To get the same result in Mechanical, I had to also enable the Average Across Bodies option (fig. 7).

I am really curious about these discrepancies in the results of ACP, Mechanical and Mechanical APDL and I am wondering if they can match each other with a particular set-up. And more importantly, I would like your opinion on which ones are the more realistic to use. If I was using Mechanical APDL, I would probably use the Nodal Solution Results, which, however, predict the lowest maximum stress.

Thank you in advance for your time.

Elias

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