See our courses in linear dynamics (harmonic and modal – e.g., https://courses.ansys.com/index.php/courses/harmonic-response-analysis-in-ansys-mechanical/)
As these are linear type of analysis, they can not account for nonlinear material.
The structural transient dynamic system can account for nonlinearities (e.g., material) – see our courses and search the internet for examples on transient dynamics (also the help manual has some examples in MAPDL).
All the best
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