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exponential softening cohesive zone (ABAQUS)

Submitted by nour202 on

Hi everyone,

what is the exponential curve used in ABAQUS to model the softening (damage evolution) for cohesive interaction? Reading the documentation, I find the equation for D (damage variable) in linear and exponential cases. But the exponetial curve is not given there (maybe it is not given explicitly).

Thanks,

Amir