Nondestructive evaluation of cylindrical components by resonance acoustic spectroscopy

Abstract

Examples of the applications of resonance acoustic spectroscopy (RAS) for the purposes of nondestructive evaluation (NDE) and on-line monitoring of the properties of various cylindrical components are presented in this paper. The mathematical equations for the scattering of a plane acoustic wave from isotropic and transversely isotropic cylinders and isotropic clad rods are reviewed. A new technique called material characterization by resonance acoustic spectroscopy (MCRAS), for the evaluation of the elastic constants of isotropic rods and wires, is introduced. This new technique is compared to the traditional time-of-flight measurement technique. Possible applications of RAS in NDE and on-line monitoring of clad rods are demonstrated using practical examples. The possibility of using RAS for evaluation of axial and transverse properties of fiber-reinforced composite wires and rods, which are transversely isotropic in nature, is discussed. The results indicate that RAS can be used as a tool for NDE and on-line monitoring of various properties of cylindrically-shaped components.