Learning Forum

[adrian92]

Hi there!

I would like to clarify something because it makes me a bit confused. Let's consider such material from supplier:

Polypropylene,

Youngs modulus: 2600MPa

Stress at yield: 62MPa

Strain at Yield: 10%

Now the question is, if I have a full Stress-strain curve and convert it into true stress - true strain, I get something like this:

[Bhargava Sista]

What you get from experiments is engineering stress/strain, this must be converted to true stress/strain before input into Ansys. So, the elastic modulus, the yield strength and the plastic vs true stress that you input for multilinear hardening curve are all taken true stress/strain. Once you finish the simulation, the stresses and strains reported by Ansys are all true stress/strain.nTo keep is short, once you have converted the engineering stress/strain to true stress/strain and input it in Ansys, all values of stress/strain reported by the solver should be compared to true stress/strain curve.nCheck out this course on Topics in Metal Plasticity, I guess two of these videos cover your questions in detail.n/courses/index.php/courses/topics-in-metal-plasticity/n