17 Aug 1999. Propagation of guided Lamb waves in plates with rough surfaces. In aluminum plates with rough surfaces, both the amplitude and frequency content of propagating guided waves have been measured. Theoretical calculations of the effect on the signal of rough guiding surfaces on the ultrasonic signal are being performed. Results show significant promise to predict the effect in a sample and to deduce the roughness from ultrasonic measurements.
Application is to assessment of hidden corrosion.
Elastic guided waves in plates with surface roughness. Elastic guided waves in plates with surface roughness. Characterization of, and plate wave propagation in, periodically laminated composites. Ultrasonic study of the propagation of leaky plate waves in anisotropic, layered advanced materials for aircraft applications. We have shown that Floquet wave solutions form partial wave decomposition of SH waves in periodic plates.