Comparing Strain/Stress and Failure Plots in Ansys ACP — Lesson 4

Why do the results seem to differ when comparing strain/stress and failure plots in Ansys ACP? 

The explanation comes from what is done in ACP for the strain and failure plots:
- ACP Sampling Point and ACP Plot displays stress/strain at element center. The values are interpolated from the element's integration points. This is similar to the display "elemental mean" that can be done in Mechanical.
- IRF (Inverse Reserve Factor) calculation is based on the worse value of all integration points, to show the most conservative case.