Abstract
In the present study, free vibration analysis of multi-delaminated composite beams is performed. An analytical formulation is proposed and studied for the vibration analysis of the composite beams with arbitrary lateral, longitudinal, and both multiple delaminations . In order to investigate the effects of these multiple delaminations on the dynamic characteristics of composite beams, the general kinematics continuity conditions are derived from the assumption of constant curvature at the multi-delamination tip. Frequency equations of multi-delaminated composite beams are obtained by dividing the global delaminated beam into beam segments and by imposing recurrence relation from the continuity conditions on each sub-beam. Experiments are performed for the case of a single delamination and finite element analysis is conducted for multiple delaminations. It is shown that multiple delaminations significantly affect the dynamic characteristics of composite laminated beams .
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