A simple theoretical treatment of moiré patterns is given with the use of relations between diagonal systems that have the physical meaning of contour lines of the functions in question. The general approach and knowledge of diagonal-system properties can simplify various problems of strain measurement by the moiré method, and this is demonstrated by the compensation of a moiré pattern and by the method of two-dimensional strain measurement.
Get full access to this article
View all access options for this article.
References
1.
ZandmanF.HolisterG. S.BrcicV.‘The influence of grid geometry on moiré fringe properties’, J. Strain Analysis19651, 1.
2.
KošťákB.‘Moiré appearing with large strains of fundamental line warps’, Acta tech., Praha1963 No. 6.
3.
DantuP.‘Utilisation des réseaux pour l’étude des déformations’, Publ. No. 57–6/II de Lab. Central des Ponts et Chaussées, Paris, 1957.
4.
PirardA.‘Considération sur la méthode du moiré en photoélasticité’, Rev. Univlle Mines, 9 Série, 1960, 16.
5.
LigtenbergF. K.‘The moiré method’, Proc. Soc. Exp. Stress Analysis195412.
6.
KošťákB.‘The use of the moiré method for slab models’, Inž. Stavby1964, No. 4 (in Czech).
7.
PostD.‘A new photoelastic interferometer’, Proc. Soc. Exp. Stress Analysis195412.
8.
MesmerG.‘The interference screen method for isopachic patterns (moiré method)’, Proc. Soc. exp. Stress Analysis195613.
9.
NisidaM.SaitoH.‘A new method of experimental stress analysis by interferometry’, Sci. Pap. Inst. phys. chem. Res., Tokyo196559 (No. 1).
SciamarellaC. A.RossB. E.SturgeonD.‘Basic optical law in the interpretation of moiré patterns applied to the analysis of strains’, Eng. Prog. Univ. Fla.1965 (July).
