Limits of the plastic material model

[MyNameIsUser]

hi, i read the documentation on this but could not get a definite answer out of it (though i believe to have read it somewhere):

For this model to work i need to supply pairs of yield stress/plastic strain points that lead to a stress strain curve that has an decreasing gradient after its elastic section, right? Else it will fail?

 

[isgfdi]

Hi, as you have to input true stress-strain data, and not engineering (or nominal) stress-strain data, the stress and plastic strain values have always to increase each line. E.g.:

400.0, 0.0 (while 400.0 is the yield stress)
410.0, 0.05
415.0, 0.1
...

Otherwise I think Abaqus issues an error message.

 

[MyNameIsUser]

Hello,

thank you for your answer.
This was not what i was asking:

I asked, whether Abaqus' ordinary plastic material model needs a yield stress/strain table whos graph has a decreasing inclination (as metals usually have in their plastic region)