Abstract
With its high sensitivity and high spatial resolution, moire interferometry is capable of analyzing strains in laminated composites on a ply-by-ply basis. It is an optical technique that produces contour maps of in-plane U and V displacement fields. The paper describes the experimental technique and presents diverse applications. Examples are taken from studies of free-edge effects, where compressive loading causes severe transverse and shear strains; shear tests, that show the importance of whole-field analysis of the strain distributions; metal-matrix specimens, which document concentrations of strains in the matrix and show anomalous movements between groups of fibers; thermal strains, which result from steady-state changes of temperature.
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References
D. Post, “Moire Interferometry,” Chap. 7, Handbook of Experimental Mechanics, A. S. Kobayashi, Editor, Prentice-Hall, Englewood Cliffs, NJ, pp. 314–387 (1987).
D. Post, “Moire Interferometry for Composites,” Chap. IV, SEM Manual on Experimental Methods for Mechanical Testing of Composites, M. E. Tuttle and R. L. Pendleton, Eds., Soc. Exp’l. Mech., Bethel, CT (1989).
A. Livnat and D. Post, “The Governing Equations for Moire Interferometry and Their Identity to Equations of Geometrical Moire,” Experimental Mechanics, 25(4), pp. 360–366 (Dec. 1985).
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D. Post, Y. Guo, and R. Czarnek, “Deformation Analysis of Boron/Aluminum Specimens by Moire Interferometry,” Metal Matrix Composites: Testing, Analysis and Failure Modes, ASTM STP 1032, W. S. Johnson, Editor, American Society for Testing and Materials, Philadelphia, 1989.
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D. Post, J. Morton, J. D. Wood, M. Y. Tsai, V. J. Parks and F. P. Gerstle, Jr., “Thermal Stresses in a Bimaterial Joint,” ASME J. Applied Mechanics (submitted for publication).
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© 1991 Elsevier Science Publishers Ltd
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Post, D. (1991). Moire Interferometry for Composites. In: Vautrin, A., Sol, H. (eds) Mechanical Identification of Composites. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3658-7_3
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DOI: https://doi.org/10.1007/978-94-011-3658-7_3
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-85166-694-2
Online ISBN: 978-94-011-3658-7
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