Integrity assessment of composite repair patch using propagating Lamb waves

In this paper, results from a numerical study on the use of Lamb wave propagation for the detection of disbond growth beneath a composite repair patch are presented. Comparison carried out against experimental results that were done previously shows good agreement. The Lamb wave simulated in the numerical study was generated by surface bonded ceramic piezoelectric transducer. The power transmission of Lamb wave can be used to quantify the relative growth of the disbond.