This paper presents a guided wave structural health monitoring (SHM)technique, based on the use of piezoelectric active-sensors, used to determine thestructural integrity of stiffened aluminum plates. For damage detection, thetransmitted power between piezoelectric transducers used for Lamb wave propagationis utilized to analyze the extent of damage in the structure. Damage initiation andpropagation were successfully monitored with the guided wave technique. Overall,these methods yielded sufficient damage detection capability to warrant furtherinvestigation into field deployment. This paper summarizes considerations needed todesign such SHM systems, experimental procedures and results, andrecommendations that can be used as guidelines for future investigations.
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