Multilinear Material

[kostast88]

Hello everyone!

I wanted to ask whether uniaxialMaterial MultiLinear contains some form of hardening, as I couldn't find documentation on this property for this material.
I also took a look on the source code, but couldn't identify anything related to it. BUT:

I subjected a frame to Timehistory analysis, and used on rotational zeroLength elements: Steel01 (15% hardening ratio) and then just MultiLinear material instead of steel01 with 2 points, yield and a post yield point, whoose values coresponded to the ones of steel01. The hysteretic behaviour was THE SAME for both cases.

Since steel01 has kinematic hardening ( optional isotropic not used), does this mean that MultiLinear material also has kinematic hardening? Because my understanding is yes...

Any comments are welcome!

[fmk]

it depends on the points specified .. if the points correspond to those of steel01 with a positive beta then yes of course the results will be the same as you are defining the kinematic hardening.