New numerical method for the photoelastic technique

AUTOR(ES)

M. Júnior, Pedro Américo A., Magalhães, Cristina Almeida, Smith Neto, Perrin

FONTE

J. Braz. Soc. Mech. Sci. & Eng.

DATA DE PUBLICAÇÃO

2012-12

RESUMO

The objective of this research is to find new equations for a novel phase-shifting method in digital photoelasticity. Some innovations are proposed. In terms of phase-shifting, only the analyzer is rotated, and the other equations are deduced by applying a new numerical technique instead of the usual algebraic techniques. This approach can be used to calculate a larger sequence of images. Each image represents a measurement of the stresses present in the object. Every photographic image has errors and random noise, but the uncertainties due to these effects can be reduced with a larger number of observations.

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