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The traveling wave ultrasonic stator is normally fabricated with teeth. The tooth geometry improves the driving speed, but it creates natural frequency splitting and mode contamination, especially a distorted traveling wave. A dynamic model of a stepped-plate periodic stator is developed to examine the distortion. The stator is treated as an annular supported by a thin mid plate, and the support stiffness...
Axial momentum carried by waves in a uniform waveguide is considered based on the conservation laws and a kind of the causality principle. Specifically, we examine (without resorting to constitutive data) steady-state waves of an arbitrary shape, periodic waves which speed differs from the speed of its form and binary waves carrying self-equilibrated momentum. The approach allows us to represent momentum...
The solution of the complete three-dimensional (3D) guided wave propagation problem in infinite laminated composite plates using a semi-analytical method is presented. The proposed method constructs the problem directly from the 3D governing equations, assuming through-the-thickness layerwise laminate mechanics with linear piecewise variation of all displacement components. The solution is then transformed...
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