Measuring and testing – Vibration – By mechanical waves
Patent
1990-07-20
1992-05-26
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
73597, 73602, G01N 2904
Patent
active
051156733
ABSTRACT:
A non-destructive method for determining elastic moduli of isotropic or anisotropic or homogeneous or nonhomogeneous material. The material is subjected to x-radiation for determining the density of the material at a sufficient number of discrete measurement points over the material to create an image of local material density variation. Ultrasonic waves are propagated through the material to determine transit times for each wave at points corresponding to the measurement points. Using the determined density and transit times for each of the measurement points, the elastic moduli at each measurement point is determined. The elastic moduli provides a means for analyzing the mechanical performance of the material. In one aspect, the determined elastic moduli are inputted into a finite element method code for determining mechanical response of the material.
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The Analysis of Fibre-Reinforced Porous Composite Materials by the Measurement of Ultrasonic Wave Velocities--Ultrasonics, Jul. 1978, 5 pages, .COPYRGT.1978 IPC Business Press Ltd.
Kline Ronald A.
Madaras Eric I.
Arana Louis M.
The Board of Regents of the University of Oklahoma
The United States of America as represented by the United States
Williams Hezron E.
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