Experimental Mechanics

, Volume 4, Issue 6, pp 153–159

Isopachic patterns by the moiré method

Highly satisfactory correlation is found between results obtained with proposed method and those obtained by other experimental methods

Authors

  • Pericles S. Theocaris
    • Laboratory for Testing MaterialsAthens National Technical University
Article

DOI: 10.1007/BF02329632

Cite this article as:
Theocaris, P.S. Experimental Mechanics (1964) 4: 153. doi:10.1007/BF02329632

Abstract

Interference between a grating, with line rulings of a density of 500 lines/in., and its shadow is used for the determination of isopachics in plane-stress problems.

The procedure consists in using a white collimated light beam obliquely incident to the model. A reference master grating is attached to the surface of the model and the interference pattern of this grating and its shadow, produced by the oblique light beam, is photographed in a position normal to the model. Interference patterns before and after loading of the specimen allow the determination of isopachics.

Copyright information

© Society for Experimental Mechanics, Inc. 1964