Journal ArticleDOI
Developments in RGB Photoelasticity
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TLDR
In this paper, the combined use of both RGB and phase stepping photoelasticity is proposed, characterised by the following features: maximum measurable order greater than that of the RGB method, ability to determine the total fringe order without necessity of unwrapping.Abstract:
In this paper the combined use of both RGB and phase stepping photoelasticity is proposed. The method is characterised by the following features: maximum measurable order greater than that of the RGB method, ability to determine the total fringe order without necessity of unwrapping.read more
Citations
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Journal ArticleDOI
Digital photoelasticity – A comprehensive review
TL;DR: This review thematically classifies all the developments in digital photoelasticity and highlights the relative merits and drawbacks of the various techniques to allow an end-user to make an informed choice on the type of technique to be used in a particular situation.
Journal ArticleDOI
Review of RGB photoelasticity
TL;DR: The article presents an overview of the main characteristics of RGB photoelasticity that is influence of the quarter-wave plate error, number of acquisitions, type of light source, determination of low and high fringe orders, methods for searching the retardation, scanning procedures, calibration on a material different from that under test, combined use of the RGB and phase shifting methods.
Journal ArticleDOI
RGB Photoelasticity: Review and Improvements
TL;DR: In this article, the main developments of RGB photoelasticity with reference to the maximum measurable retardation were considered and a new procedure based on the standard error function evaluated on a subset of the calibration array is also proposed and experimentally tested.
Journal ArticleDOI
Phase shifting photoelasticity in white light
TL;DR: In this article, the general characteristics of phase shifting photoelasticity in the colour domain were investigated, focusing on the influence of spectral content of the light source, the spectral response of the colour camera filters, the dispersion of the birefringence and the error of quarter wave plates.
Journal ArticleDOI
Photoelastic method to quantitatively visualise the evolution of whole-field stress in 3D printed models subject to continuous loading processes
TL;DR: In this paper, the authors use a series of continuous frames extracted from a video recording of the fringe changes over the entire loading process to quantify the continuous evolution of the whole-field stress in photosensitive material that is applicable to fabrication of complex structures using 3D printing technology.
References
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Journal ArticleDOI
Towards RGB photoelasticity: Full-field automated photoelasticity in white light
TL;DR: A new full-field method for the automatic analysis of isochromatic fringes in white light, named RGB photoelasticity, which makes it possible to determine retardations uniquely in the range of 0–3 fringe orders.
Journal ArticleDOI
Three fringe photoelasticity ‐ use of colour image processing hardware to automate ordering of isochromatics
K. Ramesh,Sanjeev S. Deshmukh +1 more
TL;DR: A systematic study has been carried out on how to use the red green blue (RGB) value recorded using a colour image processing system for determining fringe orders up to 3 in a fringe field and it is revealed that instead of directly using RGB values corresponding to a dark field image, if the difference of RGB values between bright and darkfield images is used, the number of noise points is less.
Journal ArticleDOI
Full-field automatic evaluation of an isoclinic parameter in white light
TL;DR: A technique for full-field evaluation of the isoclinic parameter is presented that combines the phase-shifting method with true color imaging technology and can be suitably integrated with known methods for evaluating the retardations.
Journal ArticleDOI
Computer aided photoelasticity by an optimum phase stepping method
TL;DR: In this article, an automated photoelastic method based on the phase stepping technique is described, which provides full-field maps of the isoclinic parameter and the relative retardation.
Journal ArticleDOI
Simulation of errors in automated photoelasticity
W. Ji,Eann A. Patterson +1 more
TL;DR: In this paper, the effect of using white light has been investigated both by experiment and by a simulation of a polariscope, and the simulation has been validated and used to explore the use of bandwidth filters to control the errors caused by white light.
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Towards RGB photoelasticity: Full-field automated photoelasticity in white light
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