I am modeling the bending of a 3D composite. The laminate plies are imported from a coupled temp-disp static step to a new model as deformed parts with a predefined stress field. The bending step is a static general step as well. I want to simulate delamination as well, so I use the edit mesh feature to add offset solid layers with zero thickness (with no shared nodes), and assign a cohesive section and cohesive element type to them. These layers are tied to the surrounding plies. However, I am getting the error in the attached image. Any suggestions to overcome this error? Note: the plies are assembled as separate parts.
