Consider the SOLSH190 element for modeling general layered composite structures, especially where contact, variable thickness, 3D constitutive relations, and/or thin to thick part transitions are present.

Choose the proper technology (bonded contact or cohesive zone elements) for simulating interface debonding. In this example, contact with a cohesive zone model simulates the interface debonding. Another option is available for debonding analysis via interface elements (INTER205 in this case). See Crack-Initiation and -Growth Simulation, Interface Delamination, and Fatigue Crack-Growth in the Fracture Analysis Guide; for more information about both methods.

To ensure a reliable solution, avoid an excessive energy dissipation ratio or mass damping factor in nonlinear stabilization.