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.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
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).
Y. Guo and D. Post, “Thick Composites in Compression: an Experimental Study of Micromechanical Behavior and Smeared Engineering Properties,” J. Composite Materials (submitted for publication).
Y. Guo, D. Post and R. Czarnek, “The Magic of Carrier Fringes in Moire Interferometry,” Experimental Mechanics, 29(2), pp. 169–173 (June 1989).
P. Ifju and D. Post, “A Compact Double-Notched Specimen for In-Plane Shear Testing,” Proc. 1989 Spring Conf of the Society for Experimental Mechanics, pp. 337–342 (May 1989).
D. Post, R. Czarnek, D. Joh, J. Jo and Y. Guo, “Deformation of a Metal-Matrix Tensile Coupon with a Central Slot: An Experimental Study,” Jl. of Composites Technology and Research (ASTM), Vol. 9, No. 1, pp. 3–9 (Spring 1987).
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.
R. Czarnek and D. Post, “Moire Interferometry with ± deg Gratings,” Experimental Mechanics, 24(1), 68–74 (March 1984).
D. Post and J. D. Wood, “Determination of Thermal Strains by Moire Interferometry,” Experimental Mechanics, 29(3), pp. 318–322 (Sept. 1989).
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).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1991 Elsevier Science Publishers Ltd
About this chapter
Cite this chapter
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
Download citation
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
eBook Packages: Springer Book Archive