Influences of an Initial Micro Gap on Wave Transmission
The propagation of elastic waves through a micro gap considering frictional contact is investigated in the present paper. Using the Fourier analysis technique and corrective solution superposition method, the problem is solved analytically. Special examples for identical materials are discussed in detail. The results show that the initial gap width has significant influences on the harmonics and energy partition and their relations may be effective on non-destructive evaluation of a pre-existing gap.
X. Y. Chen and G. L. Yu, "Influences of an Initial Micro Gap on Wave Transmission ", Applied Mechanics and Materials, Vols. 29-32, pp. 2662-2667, 2010