Comparison of ultrasonic signals in aircraft skin obtained through experiment and simulation

54426 Disbond detection using peak amplitude of pulse-echo signals for various thicknesses and transducer frequencies

“…This work employs an ultrasonic measurement system that is described in detail in Refs. [1][2][3]. As shown in Fig.…”

“…Unfortunately, when high frequencies are used, painted locations introduce additional complications. Moreover, effects due to attenuation, nonparallelism and other small parameter variations are maximized at higher frequencies [2][3]. As mentioned before, sophisticated signal processing techniques are required to minimize "misses" and "false calls".…”

“…In previous work [1][2][3], a high frequency (20 MHz) broadband pulse was used to characterize aircraft lap joints and reinforcing doublers. This choice was made to allow resolution of the bondline interfaces.…”