Direct Imaging of Anisotropic Material Properties using Photorefractive Laser Ultrasound

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Anisotropic properties of materials can be determined by measuring the propagation of elastic waves in different directions. A laser imaging approach is presented that utilizes the adaptive property of photorefractive materials to produce a real-time measurement of the antisymmetric Lamb or flexural traveling wave mode displacement and phase. Continuous excitation is employed and the data is recorded and displayed in all directions simultaneously at video camera frame rates. Fourier transform of the data produces an image of the wave slowness in all planar directions. The results demonstrate imaging of microstructural isotropy and anisotropy and stress induced ansiotropy in plates.

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Telschow, Kenneth Louis; Deason, Vance Albert; Schley, Robert Scott & Watson, Scott Marshall July 1, 1999.

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Anisotropic properties of materials can be determined by measuring the propagation of elastic waves in different directions. A laser imaging approach is presented that utilizes the adaptive property of photorefractive materials to produce a real-time measurement of the antisymmetric Lamb or flexural traveling wave mode displacement and phase. Continuous excitation is employed and the data is recorded and displayed in all directions simultaneously at video camera frame rates. Fourier transform of the data produces an image of the wave slowness in all planar directions. The results demonstrate imaging of microstructural isotropy and anisotropy and stress induced ansiotropy in plates.

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  • 9th International Symposium on Nondestructive Characterization of Materials,Sydney, Australia,06/28/1999,07/02/1999

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  • Report No.: INEEL/CON-98-01179
  • Grant Number: DE-AC07-99ID-13727
  • Office of Scientific & Technical Information Report Number: 911304
  • Archival Resource Key: ark:/67531/metadc890544

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  • July 1, 1999

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 9, 2016, 9:18 p.m.

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Telschow, Kenneth Louis; Deason, Vance Albert; Schley, Robert Scott & Watson, Scott Marshall. Direct Imaging of Anisotropic Material Properties using Photorefractive Laser Ultrasound, article, July 1, 1999; [Idaho Falls, Idaho]. (digital.library.unt.edu/ark:/67531/metadc890544/: accessed December 13, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.