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Journal ArticleDOI

Digital photoelasticity – A comprehensive review

10 Jun 2011-Journal of Strain Analysis for Engineering Design (SAGE Publications)-Vol. 46, Iss: 4, pp 245-266
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.
Abstract: Digital photoelasticity has rapidly progressed in the last few years and has matured into an industry-friendly technique. This review thematically classifies all the developments in digital photoelasticity and highlights the relative merits and drawbacks of the various techniques. The overall objective is to provide enough information and guidance to allow an end-user to make an informed choice on the type of technique to be used in a particular situation.
Citations
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Journal ArticleDOI
TL;DR: In this paper, a method is proposed for creating a whole field map which represents the spatial resolution of the isochromatic fringe pattern, which can be used to extract fringe data from thin slices cut from a stereo-lithographic model that has characteristic random noise due to layered manufacturing.

25 citations

Journal ArticleDOI
TL;DR: In this article, the authors discuss the development and process of integrating computed tomography (CT), 3D printing (3DP) technology, transparent rock models, and optical mechanics methods to quantitatively and visually present the interior structures and stress evolution inside rock masses.

25 citations

Journal ArticleDOI
TL;DR: In this article, photoelasticity is applied to the analysis of stress field in two classes of structural materials, namely tempered glasses and thermoset polymers, to investigate the development of swelling stresses and changes in fracture toughness as induced by water uptake aging.
Abstract: Photoelasticity is particularly suitable for the analysis of the stress state in structural materials that are transparent and birefringent. Some techniques of digital photoelasticity (phase shifting and RGB) are applied to the analysis of stress field in two classes of structural materials. The first one consists of tempered glasses, such as those used in the automotive and architectural fields. The second one consists of thermoset polymers, typically used as matrices in fiber reinforced plastic structural composites. The birefringence of such resins is, in particular, exploited to investigate the development of swelling stresses and changes in fracture toughness as induced by water uptake aging.

24 citations

Journal ArticleDOI
TL;DR: In this article, a semi-automatic contact point refinement algorithm is proposed to evaluate the unknown contact parameters by post processing the whole field fringe order data obtained from reflection photoelasticity in a nonlinear least squares sense.

23 citations

Journal ArticleDOI
TL;DR: In this paper, the determination of membrane residual stresses of glass plates by digital photoelasticity is considered and a critical assessment concerning the automated methods based on gray-field polariscope, spectral content analysis, phase shifting, RGB photo elasticity, test fringes, and tint plate method is presented.
Abstract: The measurement of residual stresses is of great importance in the glass industry. The analysis of residual stresses in the glass is usually carried out by photoelastic methods since the glass is a photoelastic material. This article considers the determination of membrane residual stresses of glass plates by digital photoelasticity. In particular, it presents a critical assessment concerning the automated methods based on gray-field polariscope, spectral content analysis, phase shifting, RGB photoelasticity, “test fringes” methods and “tint plate” method. These methods can effectively automate manual methods currently specified in some standards.

21 citations


Cites background from "Digital photoelasticity – A compreh..."

  • ...A general review of PSMs is present in Ramesh et al.(15) In this article, which generally considers retardation higher than 1 fringe order, the general PSM proposed by Barone et al....

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  • ...A general review of PSMs is present in Ramesh et al.15 In this article, which generally considers retardation higher than 1 fringe order, the general PSM proposed by Barone et al.43 and the simplified methods23 have been used....

    [...]

References
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Book
20 Oct 2008
TL;DR: The first € price and the £ and $ price are net prices, subject to local VAT as discussed by the authors, and they are subject to change without notice. All errors and omissions excepted.
Abstract: The first € price and the £ and $ price are net prices, subject to local VAT. Prices indicated with * include VAT for books; the €(D) includes 7% for Germany, the €(A) includes 10% for Austria. Prices indicated with ** include VAT for electronic products; 19% for Germany, 20% for Austria. All prices exclusive of carriage charges. Prices and other details are subject to change without notice. All errors and omissions excepted.

579 citations

Journal ArticleDOI
TL;DR: A new phase unwrapping algorithm is described that uses local phase information to mask out those parts of the field that cause inconsistencies in the unwraps and can produce an approximately correct unwrapped.
Abstract: A new phase unwrapping algorithm is described that uses local phase information to mask out those parts of the field that cause inconsistencies in the unwrapping. Unlike earlier techniques, which produce only a consistent unwrapping of the phase in the presence of discontinuities, this technique can produce an approximately correct unwrapping. The technique is tolerant of discontinuities and noise in the phase and is fast, efficient, and simple to implement. In the absence of discontinuities an rms signal-to-noise ratio in the wrapped phase of <2:1 can be tolerated.

279 citations

Journal ArticleDOI
01 May 1991-Strain
TL;DR: The design of a automated system for photoelastic analysis of complex components and the potential of the system for providing detailed data over the full field of view is demonstrated by the analysis of a slice from a model of a bolt.
Abstract: The design of a automated system for photoelastic analysis of complex components is described, and an outline of the theory used in its operation is given. The potential of the system for providing detailed data over the full field of view is demonstrated by the analysis of a slice from a model of a bolt.

221 citations

Journal ArticleDOI
TL;DR: A two-dimensional regularized phase-tracking technique that is capable of demodulating a single fringe pattern with either open or closed fringes and gives the detected phase continuously so that no further unwrapping is needed over the detectedphase.
Abstract: We present a two-dimensional regularized phase-tracking technique that is capable of demodulating a single fringe pattern with either open or closed fringes. The proposed regularized phase-tracking system gives the detected phase continuously so that no further unwrapping is needed over the detected phase.

207 citations

Book
01 Jan 2000
TL;DR: In this article, phase shifting, Polarization Stepping and Fourier Transform Methods are used for phase unwrapping and Optically Enhanced Tiling in digital photoelasticity.
Abstract: Transmission Photoelasticity.- Reflection Photoelasticity.- Digital Image Processing.- Fringe Multiplication.- Fringe Thinning and Fringe Clustering.- Phase Shifting, Polarization Stepping and Fourier Transform Methods.- Phase Unwrapping and Optically Enhanced Tiling in Digital Photoelasticity.- Colour Image Processing Techniques.- Evaluation of Contact Stress Parameters and Fracture Parameters.- Stress Separation Techniques.- Fusion of Digital Photoelasticity, Rapid Prototyping and Rapid Tooling Technologies.- Recent Developments and Future Trends.

199 citations