Theoretical and Experimental Study on the Wave Propagation through a Micro Gap
In the present paper, a preliminary exploration which includes the theoretical analysis and experimental study on the wave propagation through a micro gap was carried out. Harmonic waves, normal incidence, smooth and flat interface were taken into account. The theoretical and experimental results both show that the initial gap width has significant influences on the harmonics. Their relations may be effective on nondestructive evaluation of a pre-existing gap.
X. Y. Chen et al., "Theoretical and Experimental Study on the Wave Propagation through a Micro Gap", Advanced Materials Research, Vol. 346, pp. 508-514, 2012