Topic: Drucker Prager for Concrete
I'm trying to make a 2D model of delamination between concrete and FRP. I would like to concentrate most nonlinear behavior on interface elements so I can calibrate them, however when using Sbeta material for concrete I get cracks in the zone immediately next to the interface elements.
I have noticed that by surrounding the interface elements with concrete modelled with Drucker Prager constitutive I avoid getting cracks, however I don't know if it's correct to model the same concrete with two different constitutives. Is there any way to avoid cracks and stress concentrations on Sbeta material?