Measuring and testing – Vibration – By mechanical waves
Patent
1984-08-09
1986-03-11
Ciarlante, Anthony V.
Measuring and testing
Vibration
By mechanical waves
73159, G01N 2900
Patent
active
045746346
ABSTRACT:
A fully automatic test system is provided to nondestructively determine the elastic constant information of paper samples. Two ultrasonic wave sensors are mounted in alignment with the instrument frame at respective distances from an ultrasonic generator. A motor driven turntable beneath the sensors and generator supports a paper test specimen for automatic progression of the specimen fiber orientation relative to the sonic wave propogational direction. Electronic data processing equipment resolve ultrasonic emission and reception signals for quantitative determination of the sonic velocity through four directional transmission modes of a specimen. Such sonic velocity data enables determination of four in-plane elastic parameters.
REFERENCES:
patent: 3910104 (1975-10-01), Davies
patent: 4106327 (1978-08-01), Adler et al.
patent: 4291577 (1982-09-01), Baum et al.
patent: 4455872 (1984-06-01), Kossuff et al.
J. K. Carver & D. L. Taylor, "Nondestructive Sonic Measurement of Paper Elasticity," Tappi, vol. 48, No. 3, Mar. 1965, p. 142.
E. P. Papadakis, "Ultrasonic Methods for Modulus Measurement in Paper," Tappi, vol. 56, No. 2, Feb. 1973, p. 74.
G. A. Baum & L. R. Bornhoeft, "Estimating Poisson Ratios in Paper Using Ultrasonic Techniques," Tappi, vol. 62, No. 5, May 1979, p. 87.
R. W. Mann, G. A. Baum, and C. C. Habeger, "Elastic Wave Propagation in Paper," Tappi, vol. 62, No. 8, Aug. 1979, p. 115.
R. W. Mann, G. A. Baum, and C. C. Habeger, "Determination of All Nine Orthotropic Elastic Constants for Machine-Made Paper," Tappi, vol. 63, No. 2, Feb. 1980, p. 163.
G. A. Baum and C. C. Habeger, "On-Line Measurement of Paper Mechanical Properties," Tappi, vol. 63, No. 7, Jul. 1980, p. 63.
G. A. Baum, D. C. Brennan, and C. C. Habeger, "Orthotropic Elastic Constants of Paper," Tappi, vol. 64, No. 8, Aug. 1981, p. 97.
G. A. Baum, "Procedures for Measuring the In-Plane Orthotropic Elastic Constants of Paper Using Ultrasonic Techniques," The Institute of Paper Chemistry, Appleton, WI, IPC Technical Paper Series, No. 119, Dec. 1981.
Ciarlante Anthony V.
Marcontell W. A.
Schmalz R. L.
Westvaco Corporation
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