This paper investigates the damping effect of bonded composite repair for vibration suppression of cracked metallic panels.Influence of patch geometric parameters on the vibration level and repair efficiency is examined.Vibration level is characterized by the first modal frequency,modal damping loss factor,and the vibration amplitude out of a plane at the crack tip.The repair efficiency is evaluated by the amplitude of stress intensity factor.Results reveal that after a repair the stress intensity factors exhibit an asymptotic behaviour as the modal damping loss factor increases,especially when inserting damping materials into the composite patch.
维普
万方数据