Abstract
The ultrasonic scattering from cracks is traditionally modelled by requiring that the stresses vanish on the crack faces. A violation of this assumption is found in real cracks when asperities on opposing faces are forced into contact by closure or applied stresses. Many investigators have reported substantial decreases in ultrasonic reflections, as well as partial transmission through such cracks. This paper describes a model which has been developed to take into account the effects of the contacts on the ultrasonic signals scattered from the crack.
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References
R. B. Thompson, B. J. Skillings, L. W. Zachary, L. W. Schmerr and O. Buck, Review of Progress in Quantitative Nondestructive Evaluation 2A, D. O. Thompson and D. E. Chimenti, eds. (Plenum Press, New York, 1983), 325–343.
H. Tada, P. Paris and G. Irwin, The Stress Analysis of Cracks Handbook (Del Research Corporation,sss St. Louis, 1973).
R. B. Thompson, V. G. Kogan, J. H. Rose, T. A. Gray and E. Lopes, “A Comparison of the Axial Fields of Gaussian and Piston Transducer Radiation after Passage Through Cylindrical Surfaces at Oblique Incidence,” 1983 Ultrasonics Symposium Proceedings (IEEE, New York, in press).
R. B. Thompson and C. J. Fiedler, “Effects of Crack Closure on the Transmission and Mode Conversion of Ultrasonic Waves.”
R. B. Thompson, C. J. Fiedler and O. Buck, “Inference of Fatigue Crack Closure Stresses from Ultrasonic Transmission Measurements,” Nondestructive Methods for Material Property Determination (Plenum Press, New York, in press).
O. Buck, C. J. Fiedler, L. K. Reed, K. M. Lakin and R. B. Thompson, “Interactions of Simulated Partially Closed Cracks with Acoustic Waves,” these proceedings.
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© 1984 Plenum Press, New York
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Thompson, R.B., Fiedler, C.J. (1984). The Effects of Crack Closure on Ultrasonic Scattering Measurements. In: Thompson, D.O., Chimenti, D.E. (eds) Review of Progress in Quantitative Nondestructive Evaluation. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-1194-2_19
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DOI: https://doi.org/10.1007/978-1-4684-1194-2_19
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4684-1196-6
Online ISBN: 978-1-4684-1194-2
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