Buckling and propagation of a delaminated composite beam in bending

Moustafa Kinawy, Richard Butler, Giles W Hunt

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

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.
Original languageEnglish
Title of host publicationAIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2010: Collection of Technical Papers
PublisherAmerican Institute of Aeronautics and Astronautics
Publication statusPublished - 2010

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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.