Hi,
Sorry for delayed answer.
Unfortunately it is not possible to model any stress strain curve but a linear one. It means that Stress should be a multiply of strain:
σ=E.ϵ
But I think what you mean should be something like this:
σ=E.ϵ + σ0
Where σ0 is a constant. and it is not linear relation, so not possible to directly model it in current version of this library.
What you need should be material (and geometrical) nonlinearity, non of them are implemented in BFE.
Thanks
