Experiment with values by checking the resulting size of the damage zone. Typically, the size should have a reasonable ratio to the size of the entire structure.

Experiment with damage parameters to fit the force displacement curves.

To gain a better sense of the concrete parameters, consider first running the problem without reinforcing.

To allow sufficient resolution for the nonlocal interaction, set the element size to a value less than .

Nonconvergence may indicate that is too small or that the damage parameters are too large.