Number: Mech 119/94
Author(s): RAVASOO, A.
Title: Ultrasonic nondestructive evaluation in inhomogeneous plain strain in elastic medium. 23 p.
Language: English
ABSTRACT. The possibility to enhance the efficiency of ultrasonic
nondestructive testing making use of non-linear effects of wave
propagation is investigated theoretically. The quasi one-
dimensional problem of non-linear longitudinal wave propagation
in elastic medium undergoing inhomogeneous plain prestrain is
solved. The solution establishes the relations between the
physical and geometrical properties of the medium, parameters of
its predeformed state and the characteristics of the wave with
smooth arbitrary initial profile. The non-linear sine-wave
propagation in the medium with two traction free surfaces is
considered in more detail. The algorithm for evaluation of the
parameters of predeformed state on the basis of wave velocity and
its profile evolution measurement data is proposed.