Abstract
In recent years, the promising patch repair method using FRP composite patches bonded to the damaged components of high speed transportation systems has received much attention. In this paper, the patching efficiency in cracked structural panels repaired with a bonded FRP composite patch containing a piezoelectric fiber composite actuator layer is investigated. A two-dimensional finite element method is used to obtain stress intensity factors at a crack tip. The structural panel and composite patch are modeled as layers composed of Mindlin plate elements, while the adhesive layer is modeled as a thin elastic one. The stress intensity factors are calculated using the modified crack closure method. The effects of location of piezoelectric fiber composite actuator layer, size and shape of FRP composite patch, and stacking number of actuators on the patching efficiency are examined. We also discuss the effect of disbond area on the patching efficiency.
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