Title :
Numerical predictions of surface wave phenomena for ultrasonic NDE
Author :
Lord, W. ; You, Z. ; Lusk, M. ; Ludwig, R.
Author_Institution :
Dept. of Electr. Eng., Colorado State Univ., Fort Collins, CO, USA
Abstract :
Finite-element analysis formulation has been developed for the simulation of ultrasonic nondestructive evaluation phenomena, which include the effects of finite aperture transducers and anisotropic material properties. The computer code has been validated qualitatively for 2-D simulations of elastic-wave propagation in an aluminium block by comparison with experimental measurements, and quantitatively for 2-D simulations of point sources acting on an infinite half-space by comparison with an analytical Cagniard-de-Hoop formulation. The authors describe how the finite-element formulation can be used to predict not only longitudinal and shear-wave propagation, but also the interaction of surface waves with cracks in materials
Keywords :
finite element analysis; nondestructive testing; ultrasonic materials testing; 2-D simulations; Al; Cagniard-de-Hoop formulation; anisotropic material properties; computer code; cracks; elastic-wave propagation; experimental measurements; finite aperture transducers; finite-element analysis; infinite half-space; longitudinal wave propagation; materials; numerical predictions; point sources; shear-wave propagation; surface wave phenomena; ultrasonic NDE; ultrasonic nondestructive evaluation; Aluminum; Analytical models; Anisotropic magnetoresistance; Apertures; Computational modeling; Computer simulation; Finite element methods; Surface waves; Ultrasonic transducers; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 1988. Proceedings., IEEE 1988
Conference_Location :
Chicago, IL
DOI :
10.1109/ULTSYM.1988.49541
