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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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.
66 citations
TL;DR: In the last three decades of developments, the technique of Digital Photoelasticity (DP) has been stabilized and the methodology has successfully applied to a wide range of problems in Engineering and science as discussed by the authors.
56 citations
TL;DR: In this article, the authors used 3D printed models based on X-ray microfocus computed tomography (CT) imaging of a concrete sample to replicate its complex aggregate structure in a transparent matrix, and the associated three-dimensional stress field is visually characterized at mesoscale through uniaxial compression tests and photoelastic techniques that incorporate a threedimensional frozen-stress test to analyse the effects of randomly distributed aggregates.
53 citations
TL;DR: The recent advances in digital photoelasticity have made it possible to use it conveniently for the stress analysis of articles and components made of glass as discussed by the authors, which necessitates different techniques and associated equipments.
51 citations
TL;DR: This work presents a new digital photoelasticity Reference EPFL-ARTICLE-222716 that combines holographic interferometry and digital image correlation for Fringe projection profilometry with real-time information about the response of the human eye to light.
38 citations
References
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TL;DR: This paper investigates whether one or all of the image planes can be thought of as behaving like an optical filter: with the hardware used, the green channel is found to behave in this way and this idea is then used to extend the phase-shifting technique to colour domain.
26 citations
TL;DR: In this paper, a comparative study has been conducted on the performance of these methods both qualitatively and quantitatively, and theoretically simulated and experimentally recorded images for a ring under diametral compression is used.
Abstract: With the advent of PC-based digital image processing systems, automation of parameter estimation based on intensity processing from the entire field has now become simpler. Various methods for obtaining the isoclinic parameter using plane, circular, and mixed polariscopes have been reported in the literature. A comparative study has been conducted on the performance of these methods both qualitatively and quantitatively. The focus of the study is on how these algorithms provide the basic isoclinic data. To illustrate the performance, theoretically simulated and experimentally recorded images for a ring under diametral compression is used. The role of background light intensity and quarter-wave plate mismatch on the experimental evaluation of isoclinic data is brought out.
25 citations
TL;DR: In this paper, a four-centre study has been conducted in an attempt to understand the mechanisms generating this birefringence and to investigate methodologies for producing models free of stress and birfringences.
Abstract: Three-dimensional photoelasticity using the stress-freezing technique is dependent on the production of resin models that do not possess any residual stresses from the manufacturing process. The traditional methods of production involve casting to shape or machining from solid blocks using thermo-setting resins. These methods are expensive and time-consuming, with models typically requiring days for preparation. The rapid-prototyping technique of stereolithography employs similar resins and allows complex components to be built in a matter of hours. However, the residual birefringence associated with the stereolithographic process has so far inhibited its routine use in photoelasticity. A four-centre study has been conducted in an attempt to understand the mechanisms generating this birefringence and to investigate methodologies for producing models free of stress and birfringence. The mechanical behavior of stereolithographic and thermo-setting resins have been compared at room temperature and under stress-freezing conditions.
24 citations
TL;DR: The recent advances in rapid prototyping (RP) have made it possible to produce prototypes of very complicated parts directly from 3D CAD models without using part specific tooling as discussed by the authors.
Abstract: The recent advances in rapid prototyping (RP) [1–5] have made it possible to produce prototypes of very complicated parts directly from three-dimensional computer aided design (CAD) models without using part specific tooling. Application of these techniques for producing prototypes leads to considerable reduction in the total cycle time. There are a number of RP techniques developed so far, such as stereolithography (STL), fused deposition modelling (FDM), solid ground curing (SGC), selective laser sintering (SLS) etc. This technology has emerged in response to the need for reducing the lead-time to produce physical prototypes. These models could be directly used for checking form, fit and function, getting management approval for detailed design and development, conducting market research, submitting for price negotiations and as models for wind tunnel testing.
23 citations
23 citations