Measuring and testing – Vibration – By mechanical waves
Patent
1992-10-21
1994-05-03
Chapman, John E.
Measuring and testing
Vibration
By mechanical waves
73600, 73818, G01N 2904, G01N 308, G01H 108
Patent
active
053076800
ABSTRACT:
A process and apparatus for visualization of internal stresses in solid materials by an acoustic microscope (10) connected to an acoustic lens (5) having a circular or spherical transmitting and receiving surface (8) for transmitting ultrasonic waves to and receiving reflected waves from a sample (3) to be examined in a body of liquid (2), such as water, a motor drive unit (7) having a movable arm thereon (6) connected to the acoustic lens (5) for supporting and moving the lens for scanning the sample, the motor drive (7) being connected to the acoustic microscope (10) for being operated thereby to perform the scanning, a computer (16) having a visual display unit (18), and an oscilloscope (20) for indicating the reflected waves.
REFERENCES:
patent: 4012951 (1977-03-01), Kessler
patent: 4459852 (1984-07-01), Chubachi et al.
patent: 4503708 (1985-03-01), Kino et al.
patent: 4524621 (1985-06-01), Yamanaka
patent: 4531410 (1985-07-01), Crostack
patent: 4620443 (1986-11-01), Khuri-Yakuh
patent: 4655083 (1987-04-01), Chubachi
patent: 4658649 (1987-04-01), Brook
patent: 4674333 (1987-06-01), Jindo et al.
patent: 4702112 (1987-10-01), Lawrie et al.
patent: 4788866 (1988-12-01), Tanimoto et al.
patent: 4866986 (1989-09-01), Cichanski
patent: 5079952 (1992-01-01), Nakaso et al.
patent: 5085081 (1992-02-01), Ohn
Curtis, G. J., "The Use of Surface Elastic Waves in Examing Surface Mechaal Properties", Sziland, J., Ultrasonic Testing (N.Y., Wiley, 1982), pp. 326-340.
R. A. Toupin and B. Bernstein, J. Acoust. Soc. Am. 33, pp. 216-225, 1961, "Sound Waves in Deformed Perfectly Elastic Materials, Acoustoelastic Effect".
R. N. Thurston and K. Brugger, Phys. Rev., vol. A133, pp. 1604-1610, 1964, "Third-Order Constants and the Velocity of Small Amplitude Elastic Waves in Homogeneously Stressed Media".
D. I. Crecraft, J. Sound Vib. 5, (I), pp. 173-192, 1967, "The Measurement of Applied and Residual Stresses in Metal Using Ultrasonic Waves".
N. N. Hsu, Experimental Mech. vol. 14, No. 5, pp. 169-176, 1974, "Acoustical Birefringence and the Use of Ultrasonic Waves for Experimental Stress Analysis".
Yih-Hsing Pao, Tsung-Tsong Wu and U. Gamer, J. App. Mech., pp. 11-17, vol. 58, 1991, "Acoustoelastic Birefringence in Plastically Deformed Solid".
J. H. Cantrell and K. Salama, Intern. Mat. Rev., vol. 36, 1991, pp. 125-145, "Acoustoelastic Characterisation of Materials".
G. S. Kino et al., J. Appl. Phys. vol. 50, pp. 2607-2613, 1979, "Acoustoelastic Imaging of Stress Fields".
G. C. Johnson, J. Appl. Mech. vol. 48, 1981, pp. 791-795, "On the Applicability of Acoustoelasticity for Residual Stress Determination".
S. W. Meeks et al., Appl. Phys. Lett. vol. 55, No. 18, pp. 1835-1837, 1989, "Microscopic Imaging Residual Stress Using a Scanning Phase-Mesauring Acoustic Microscope".
J. H. Cantrell and M. Qian, Appl. Phys. Lett. vol. 57, No. 18, 1990, pp. 1870-1872, "Scanning Electron Acoustic Microscope of Indentation Induced Cracks and Residual Stresses In Ceramics".
K. F. Young, IBM J. Res. Develop. vol. 34, No. 5, 1990, pp. 706-717, "Finite Element Analysis of Planar Stress Anisotropy and Thermal Behavior in Thin Films".
Chapman John E.
Kwok Helen
The United States of America as represented by the Secretary of
LandOfFree
Method and apparatus for visualization of internal stresses in s does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for visualization of internal stresses in s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for visualization of internal stresses in s will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2107379