Abstract

BRINEZ DE LEON, JUAN C.; RESTREPO MARTINEZ, ALEJANDRO  and  LOPEZ GIRALDO, FRANCISCO E.. SIMILARITY METRICS APPLIED TO IMAGE ANALYSIS OF PHOTOELASTICITY. Dyna rev.fac.nac.minas [online]. 2013, vol.80, n.179, pp.42-50. ISSN 0012-7353.

Most of the works in the photoelasticity field have been focused on the stress distribution study for birefringent materials of a defined thickness, due to the complexity in the relationship between the material thickness, the refractive indices and the phase delay generated in the transmission of light. There are cases where occur temporal change on the relationship presented above while the force is applied, cases where a make a description of the photoelasticity phenomenon is more difficult by the complexity of it, the deformation of plastic films is one of these cases. This paper presents a technique based in similarity metrics for the image analysis on photoelasticity studies of plastic film deformation under mechanical stress. The plastic film is deformed in a mechanical traction machine, the photoelasticity images are captured in a video camera through of optical assembly. The dynamic behavior of the mechanical deformation in the plastic film can be related whit dynamics behavior obtained in the similarity metrics.

Keywords : Plastic film; deformation; photoelasticity; similarity metric.

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