Abstract
A simple technique of shifting the master grating to increase the sensitivity of moiré measurements is proposed. Details of the technique are described and an application of multiplication by three of a 1000-lines/in. grating is given. It is believed that multiplication by five should be obtainable.
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References
Morse, S., Durelli, A. J., and Sciammarella, C. A., “Geometry of Moiré Fringes in Strain Analysis,” Trans. ASCE,126-I (1961).
Sciammarella, C. A., and Durelli, A. J., “Moiré Fringes as a Means of Analyzing Strains,” Trans. ASCE,127-I (1962).
Sciammarella, C. A., andChiang, Fu-Pen, “The Moiré Method Applied to Three-dimensional Elastic Problems,”Experimental Mechanics,4,11,313–319 (1964).
Riley, W. F. andDurelli, A. J., “Application of Moiré Methods to the Determination of Transient Stress and Strain Distributions,”Jnl. Appl. Mech.,29,1 (March1962).
Sciammarella, C. A., “Basic Optical Law in the Interpretation of Moiré Patterns Applied to the Analysis of Strains,”Experimental Mechanics,5,5,154–160 (1965).
Sciammarella, C. A. andLurowist, N., “Multiplication and Interpolation of Moiré Fringe Orders by Purely Optical Techniques”Jnl. Appl. Mech.,34,2,425–430 (June1967).
Dantu, P., “Utilisation des Reseaux pour L'Etude des Déformations,”Pub. No. 57-6, Lab. Central des Ponts et Chaussées, Paris (1957).
Durelli, A. J. andSciammarella, C. A., “Elastoplastic Stress and Strain Distribution in a Finite Plate with a Circular Hole Subjected to Unidimensional Load,”Jnl. Appl. Mech.,30,1,115–121 (March1963).
Chiang, Fu-Pen “A Method to Increase the Accuracy of Moiré Method,”Jnl. Eng. Mech. Div., Proc. ASCE,91,EM 1,137–149 (February1965).
Post, D., “Moiré Grid-analyzer Method for Stress Analysis,”Experimental Mechanics,5,11,366–377 (1965).
Guild, J., “The Interference System of Crossed Diffraction Gratings,”Clarendon Press, Oxford (1956).
Low, I. A. B., “The Moiré Method Using Diffraction Gratings,” presented to the SESA, Detroit (May 1966).
Holister, “Moiré Method of Surface Strain Measurement,” Engineer (June 27, 1967).
Post, D., “Analysis of Moiré Fringe Multiplication Phenomena,” Appl. Optics (Nov. 1967); also “New Optical Methods of Moiré Fringe Multiplication,”Experimental Mechanics,8,2, 63–68 (1968).
Sampson, R. C., andCampbell, D. M., “The Grid-shift Technique for Moiré Analysis of Strain in Solid Propellants,”Ibid.,7,11,449–457 (1967).
Post, D., “Sharpening and Multiplication of Moiré Fringes,”Ibid.,7,4,154–159 (1967).
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Chiang, FP., Parks, V.J. & Durelli, A.J. Moiré-fringe interpolation and multiplication by fringe shifting. Experimental Mechanics 8, 554–560 (1968). https://doi.org/10.1007/BF02327518
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DOI: https://doi.org/10.1007/BF02327518