“…Their modeling approach allows for open as well as constrained delamination, depending on whether the crack is allowed to open freely or is kinematically coupled with the other sublaminate. Numerous publications dealing with free vibration of delaminated beams follow up on this approach of open and constrained delaminations, including, but not limited to [26][27][28][29][30]. Further work on delaminated beams includes the consideration of nonlinear effects by Luo and Hanagud [31].…”