I created a script file. But I can only define linear spring behavior. I want to define non-linear spring behaivor.
mdb.models['Model-1'].parts['Part-1'].engineeringFeatures.TwoPointSpringDashpot(
name='Springs/Dashpots-2', regionPairs=region, axis=FIXED_DOF, dof1=2,
dof2=2, orientation=None, springBehavior=ON, springStiffness=100.0,
dashpotBehavior=OFF, dashpotCoefficient=0.0)