Abstract
The detrimental effects of porosity on material strength are well known. The work of Hsu, Rose, and Adler[l] provides a means of estimating the volume fraction of pores and the average pore radius in isotropic elastic media from the value of frequency at which the attenuation coefficient becomes frequency independent and the magnitude of the attenuation coefficient at that plateau. Quantitative results for the isotropic case depend on numerical factors obtained by Gubernatis et al. [2] which are functions of the ratio of the transverse to longitudinal sound velocities, i.e., on the Poisson ratio. Mobley et al. [3] have tested these theories by making measurments of attenuation covering a frequency range that extended well into the frequency independent plateau. The experimental results of these investigators suggest that the theoretical results obtained by Rose et al. are qualitatively correct even though some of the features of wave propagation in layered, anisotropic media are not explicitly incorporated into the scattering model.
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References
J. H. Rose, D. K. Hsu, and L. Adler, “Ultrasonic characterization of porosity using the Kramers-Kronig relations,” Journal De Physique, vol. 46, pp. 787–790, 1985.
J.E. Gubematis, E. Domany, J.A. Krumhansl, and M. Huberman, The Fundamental Theory of Elastic Wave Scattering by Defects in Elastic Materials: Integral Equation Methods for Application to Ultrasonic Flaw Detection, Materials Science Center, Cornell University, Technical Report 2654, Ithaca, NY, 1976. Unpublished.
L. Adler, J. H. Rose, and C. Mobley, “Ultrasonic method to determine gas porosity in aluminum alloy castings: theory and experiment,” J. Appl. Phys., vol. 59, pp. 336–347, 1986.
D. K. Hsu and S. M. Nair, Evaluation of porosity in graphite-epoxy composite by frequency dependence of ultrasonic attenuation, pp. 1185–1193, Plenum Press, New York, 1986.
S. M. Nair, “Quantitative evaluation of porosity in graphite-epoxy composites using the frequency dependence of ultrasonic attenuation,” Masters Thesis (Iowa State University, Ames, Iowa), 1986.
B. R. Tittmann, B. Hosten, and M.Abdel-Gawad, “Ultrasonic attenuation in carbon-carbon composites and the determination of porosity,” Proceedings of the 1986 IEEE Ultrasonics Symposium, pp. 1047–1049, 1986.
J. H. Rose, Kramers-Kronig relations and the ultrasonic characterization of porosity in Review of Progress in Quantitative NDE, Plenum Press, New York, 1985.
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© 1988 Plenum Press, New York
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Hughes, M.S., Handley, S.M., Miller, J.G., Madaras, E.I. (1988). A Relationship between Frequency Dependent Ultrasonic Attenuation and Porosity in Composite Laminates. In: Thompson, D.O., Chimenti, D.E. (eds) Review of Progress in Quantitative Nondestructive Evaluation. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-0979-6_19
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DOI: https://doi.org/10.1007/978-1-4613-0979-6_19
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