Discrete Time Model for Bond Detection in Thin Layer Materials

• Authors: M. Ali , N. Elsayed , G. Hassan
• Languages of publication: EN

Abstracts

EN

Recursive equations were developed and introduced that enable to calculate the transmitted waves through a multiplicity of layers. The calculations are carried out using z-transform technique. The layers are considered lossless and have parallel interface, which are at normal incidence to the field. The multilayered structures are constructed of three aluminum plates connected together with epoxy as the adhesive layers. The method has been successfully used to detect small changes in the thickness of adhesive layers.

Keywords

EN

43.60.+d

Discipline

• 43.60.+d: Acoustic signal processing

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 1
• Pages: 82-84

Dates

published

2012-07

received

2010-01-29

(unknown)

2012-01-29

(unknown)

2012-02-22

Contributors

author

M. Ali

• Physics Department, Faculty of Science, Minia University, Minia, Egypt

author

N. Elsayed

• Physics Department, Faculty of Science, Minia University, Minia, Egypt

author

G. Hassan

• Physics Department, Assiut University, 71516 Assiut, Egypt

References

• 1. R. Adams, P. Cawley, NDT Int. 21, 208 (1988)
• 2. W.R Scott, P.F. Gordon, Acoust. Soc. Am. 62, 108 (1977)
• 3. L.M. Brekhovskikh, Waves in Layered Media. Applied Mathematics and Mechanics, 2nd ed., Academic, London 1980
• 4. L. Jakevičius, J. Butkus, A. Vladišauskas, Ultragarsas 58, 20 (2006)
• 5. E. Maev, I. Severina, S. Bondarenko, G. Chapman, B. O'Neil, F. Severin, R. Maev, Can. J. Appl. Phys. 82, 981 (2004)
• 6. M. Redwood, Acoust. Soc. Am. 4, 527 (1961)
• 7. O.M. Steutzer, Acoust. Soc. Am. 42, 502 (1967)
• 8. G.L. Gooberman, Ultrasonic Theory and Application, Universities Press, London 1968
• 9. F.F. Kuo, Network Analysis and Synthesis, Wiley, New York 1966
• 10. M.G.S. Ali, J. Sound Vibrat. 224, 349 (1999)
• 11. A.V. Oppenheim, R.W. Schafer, Digital Signal Processing, Englewood Cliffs, Prentice Hall, NJ 1975
• 12. E. Jury, Theory and Application of the z-Transform Method, Krieger, Florida 1982

Identifiers

DOI

10.12693/APhysPolA.122.82