Delamination is considered one of the most critical damage modes in composite materials. It has been studied extensively for in-plane compression of composite structures. Delamination in composite beams under pure bending is presented here. Experiments have been performed to determine the critical moment when the delamination buckles open (snap-buckling) and the moment at which propagation of the delamination occurs. A mathematical model has been adapted to predict the snap-buckling moment level and the bifurcation behavior. Mixed mode analysis has been applied to calculate the moment for delamination propagation. The snap-buckling and propagation moment levels were successfully predicted. Fatigue tests were performed to check the influence of the snap-buckling mode on the threshold moment for propagation.
|Title of host publication||AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2010: Collection of Technical Papers|
|Publisher||American Institute of Aeronautics and Astronautics|
|Publication status||Published - 2010|
Kinawy, M., Butler, R., & Hunt, G. W. (2010). Buckling and propagation of a delaminated composite beam in bending. In AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2010: Collection of Technical Papers American Institute of Aeronautics and Astronautics.