The Moiré Method for Measuring Large Plane Deformations: General Theory and Application to Homogeneous Deformation

[+] Author and Article Information
L. P. Martin

Scientific Specialist, EG & G, Albuquerque, N. Mex.

F. D. Ju

Department of Mechanical Engineering, University of New Mexico, Albuquerque, N. Mex.

J. Appl. Mech 36(3), 385-391 (Sep 01, 1969) (7 pages) doi:10.1115/1.3564689 History: Received February 11, 1969; Online September 14, 2011


Moiré fringe equations are developed for directly determining the components of Green’s and Conchy’s deformation tensors from fringe pitch and angle measurements. The equations are derived using the method of indicial representation of the specimen and master grid geometries. The master grid may be arbitrarily changed during the course of an experiment to obtain more easily measurable patterns. The results are specifically verified for the measurement of a large simple shear deformation.

Copyright © 1969 by ASME
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