Hi.

Say that I use a non-linear material model, like plasticity von mises, and then define a SS curve.

Normally I would start my SS curve at or directly above the yield strength of the material.

Below this point the elastic modulus handle the response

What happens if I add data for stress and strain below the yield strength in my SS curve?

Will the solver still use this data instead of the elastic modulus, or will it ignore this information and use E modulus until yield?

I can't try it because I don't have premium/non-linear, but I'm curious how this works.

Thank you in advance for your response.

"In the latter solution, I would then use a non linear material model, and this doesn't require any elasticity modulus, only ss curve I pressume?

(As mentioned before I don't have this option today so I can't look for myself)"

yes, it would be nonlinear elastic: http://help.solidworks.com/2014/English/SolidWorks/cworks/c_Nonlinear_Elastic_Model.htm

"How do I enter the ss curve if I go for the first solution? 0,2% strain meets the curve at about 112 MPa not 140 as in specificiation. Or because of the elasticity I should draw a line from 140MPa back to 0,2% and then move this angled line to find the corresponding stress at 0,4%, 0,6%, 0,8% ?"

0.2% method is standard and you'll have to accept the discrepancy, that is part of the assumptions in this case.

or go with 140 and accept the discrepancy on the other side of the curve.

as bill mentioned, there is no way to get both in this situation. i guess potentially you could run a sim with nonlinear elastic to see the behavior up to the yield point and the vonmisses afterwards. unfortuantely therei s no model that combines both.

maybe a more general question but where do you see the stresses in this part ending up? are you designing something that you want to see plastic deformation?