1. The problem statement, all variables and given/known data I am modeling a 2D indentation test of pure Aluminum in ANSYS using non-linear analysis. The objective is to determine the minimum force required at the rigid indenter in order to achieve yielding of the Aluminum block. The indenter is 2 micrometers in width and is rigid. 2. Relevant equations My main question is how can I tell if the material has yielded in ANSYS? I assumed it would yield once it reaches its yield strength of approximately 90 MPa but according to the Slip Line Theory, the material will yield at almost 250 MPa. How do I know the stress at which the material will yield? 3. The attempt at a solution I ran the simulations by specifying a value for a remote displacement and then checked the stress levels. Does anyone have an idea how I can do this another way and find out the point at which the aluminum yields? Thank you for your help!!