Title :
A facet ensemble approach for evaluation of array performance in ultrasonic NDE
Author :
McGarrity, J.P. ; Hayward, G. ; Powell, D.J.
Author_Institution :
Dept. of Electron. & Electr. Eng., Strathclyde Univ., Glasgow, UK
Abstract :
The operational features of a complex simulation model for the generation of synthetic data in ultrasonic array NDE (nondestructive evaluation) applications are described. In the proposed model, the scattering surfaces are constructed from an ensemble of planar strips or facets, each with a closed-form p-wave scattering solution. To illustrate the model, a range of simulation results concerning the transient imaging of a triangular crack in a solid medium is presented. The influence of element spacing and center frequency is also considered in conjunction with aperture size, defect orientation, and surface roughness. Sufficiently good agreement between theory and experiment has been obtained to validate the approach for time-domain imaging applications
Keywords :
crack detection; simulation; ultrasonic materials testing; aperture size; center frequency; closed-form p-wave scattering solution; complex simulation model; defect orientation; element spacing; facet ensemble approach; planar strips; scattering surfaces; solid medium; surface roughness; synthetic data; time-domain imaging applications; transient imaging; triangular crack; ultrasonic array nondestructive evaluation; Closed-form solution; Design optimization; Focusing; Scattering; Signal processing; Solid modeling; Surface cracks; Surface topography; Surface waves; Ultrasonic transducer arrays;
Conference_Titel :
Ultrasonics Symposium, 1990. Proceedings., IEEE 1990
Conference_Location :
Honolulu, HI
DOI :
10.1109/ULTSYM.1990.171538
