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Nonlinear stiffness for cohesive behaviour

Nonlinear stiffness for cohesive behaviour

Nonlinear stiffness for cohesive behaviour

(OP)
Dear all,

I was wondering if you can provide me with advice regarding Abaqus issue. I'm using cohesive behaviour to model interaction between two surfaces (concrete and rebar). I need to define exponential (or nonlinear) stiffness (Knn, Kss, Ktt) for the cohesive behaviour for the ascending branch (before damage starts)? In the CAE Abaqus seems only to give the choice of entering constant (i.e linear) stiffness. Is there anyway to do this in Abaqus?

Regards

Mo

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