NONDESTRUCTIVE EVALUATION OF CYLINDRICAL COMPONENTS BY RESONANCE ACOUSTIC SPECTROSCOPY

Examples of the applications of resonance acoustic spectroscopy (RAS) for the purposes of nondestructive evaluation (NDE) and on-line monito ring of the properties of various cylindrical components are presented in this paper. The mathematical equations For the scattering of a pla ne acoustic wave from isotropic and transversely isotropic cylinders a nd isotropic clad rods are reviewed. A new technique called material c haracterization by resonance acoustic spectroscopy (MCRAS), for the ev aluation of the elastic constants of isotropic rods and wires, is intr oduced. This new technique is compared to the traditional time-of-flig ht measurement technique. Possible applications of RAS in NDE and on-l ine monitoring of clad rods are demonstrated using practical examples. The possibility of using RAS for evaluation of axial and transverse p roperties of fiber-reinforced composite wires and rods, which are tran sversely isotropic in nature, is discussed. The results indicate that RAS call be used as a tool for NDE and on-line monitoring of various p roperties of cylindrically-shaped components. (C) 1998 Elsevier Scienc e B.V. All rights reserved.