Hi, I wanted to clarify a doubt I have while implementing damage models in ABAQUS EXPLICIT
Could any one tell me which of these two relations are correct
SIG_n+1 = SIG_n + STIFFNESS_n+1*(INC_STRAIN_n+1)
SIG_n+1 = STIFFNESS_n+1*(STRAIN_n+1)
It is apparent that the first of the above two seems correct, but with increase in damage the stress levels do not drop to zero, even if damage was set to 1 it remains at a level when damage was first initiated. I wanted to know how should one bring the load carrying capacity to zero when complete damage has occurred.
If the second one is used this is not a problem, but the formulation does not seem correct