Material properties using holographic interferometry
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A particular optical configuration has been used by the authors to holographically obtain interference patterns which are unsensitive to rigid body translations. The fringe pattern depends on the strains and any rotations of the body. When a curved surface or several flat surfaces of a homogeneous body are viewed simultaneously, rotations can be eliminated from the fringe pattern, and the strain in the viewing direction can be determined from a single view of the hologram. This technique has been used to measure the thermal expansion coefficients of a beryllium rod and the shear modulus of an aluminum bar with an accuracy of a few percent.
KeywordsAluminum Material Property Thermal Expansion Fluid Dynamics Shear Modulus
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- 1.Haines, K. A. andHildebrand, B. P., “Surface-Deformation Measurement Using the Wavefront Reconstruction Technique,”Appl. Optics,5,595 (1966).Google Scholar
- 2.Aleksandrov, E. B. andBonch-Bruevich, A. M., “Investigation of Surface Strains by the Hologram Technique,”Soviet Physics-Technical Papers,12,258 (1967).Google Scholar
- 3.Ennos, A. E., “Measurement of In-Plane Surface Strain by Hologram Interferometry,”J. Sci. Instrm. (J. Phys. E.) 1968 Series 2,1,731 (1968).Google Scholar
- 4.Tsuruta, T., Shiotake, N., andItah, Y., “Formation and Localization of Holographically Produced Interference Fringes,”Optica Acta,16,723 (1969).Google Scholar
- 5.Yamaguchi, I. andSailo, H., “Application of Holographic Interferometry to the Measurement of Poisson's Ratio,”Jap. J. Appl. Phy.,8,768 (1969).Google Scholar
- 6.Wallach, J., Holeman, J. M., and Passanti, F. A., “Holographic Strain Measurements on a Tensile Specimen,” Proc. of Symp., Eng. Applications of Holography (Feb. 1972).Google Scholar
- 7.Dhir, S. K. and Sikora, J. P., “Holographic Analysis of a General Displacement Field,” Proc. of Symp. Eng. Applications of Holography (Feb. 1972).Google Scholar
- 9.Michael, H., “Quantitative Deformation Measurements of Diffusely Reflecting Objects with the Aid of Holography,”Applied Optics,12 (6),111 (1973).Google Scholar
- 10.Spetzler, H., Scholz, C. H., andLu, J. Chi-Ping, “Strain and Creep Measurements on Rocks by Holographic Interferometry,”Pure and Applied Geophysics, V 112/3, 571 (1974).Google Scholar
- 11.Roark, R. F., Formulas for Stress and Strain, McGraw-Hill Book Co. (1954).Google Scholar
- 12.Derivations of fringe patterns for several shapes of bodies undergoing strain can be found in Sandia Laboratory Report, SLL-73-5325 (1974).Google Scholar