I am trying to do a problem on Material Non-linearity , to model steel for large deformation , beyond yield point ,(adsbygoogle = window.adsbygoogle || []).push({});

I have tensile testing data for the steel ( in form of Engineering stress vs Engineering strain).

for defining the model , I chose Multilinear Isotropic hardening

now there are 2 options

stress vs total strain & stress vs Plastic strain

Which option should I choose ( I was asked to choose Stress vs Plastic strain )

Also , what values should I use ? Engineering stress , Engineering Plastic strain (engineering strain - engineering stress/youngs modulus ) ;

or True stress and true strain values ( I know how to calculate them )

can any one clarify?

Also , to make it clear , I am trying to simulate a 4 point bending test , I know how to do contact analysis etc , I am only confused about the material modelling part

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# ANSYS-Steel beyond yield point -Engineering strain or true strain for Plastic strain

**Physics Forums | Science Articles, Homework Help, Discussion**