Review of RGB photoelasticity

Ajovalasit, Augusto; Petrucci, G.; Scafidi, Michele

doi:10.1016/j.optlaseng.2014.12.008

Cited by 82 publications

(38 citation statements)

References 87 publications

(191 reference statements)

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“…Some of most often used techniques are phase shifting, load stepping, spectral content analysis, fast Fourier transform, Three-Fringe Photoelasticity (TFP) or the RGB (Red Green Blue) photoelasticity, etc. (Digendranath, Binu, P, & Annamala, 2015), (Ajovalasit, Petrucci, & Scafidi, 2015). The RGB method is convenient since it allows the stress data to be obtained from a single image, by demodulating the intensities of three prime coloursred, green and bluefrom the fringe patterns pixel by pixel and extracting the required fringe parameters.…”

Section: Fig 4 a Schematic Representation Of A Circular Polariscopementioning

confidence: 99%

Photoelaticity and Its Application to Structural Analysis. A Review Based on Professor Vlatko Brčić Achievements

Hedrih¹,

Paunović²

2018

JSSCM

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Professor Vlatko Brčić was a very prominent scientist-theoretician, researcher and engineer, and he had a profound scientific influence on the development of civil engineering and stress analysis of civil engineering structures in the Western Balkans. This paper presents a brief overview of the scientific results and engineering activity of prof. Brčić, as well as a report on his research regarding the improvement and application of the photoelasticity method in stress state analysis of various engineering structures, while the results and influence of his work are discussed in more detail.

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Section: Fig 4 a Schematic Representation Of A Circular Polariscopementioning

confidence: 99%

Photoelaticity and Its Application to Structural Analysis. A Review Based on Professor Vlatko Brčić Achievements

Hedrih¹,

Paunović²

2018

JSSCM

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“…First, f σ of the pure-epoxy specimen, meaning no carbon fiber embedded, was obtained from a bending test [34]. Δσ distribution under bending load and an image of continuous colored band corresponding to N can be simultaneously recorded.…”

Section: Theorymentioning

confidence: 99%

Evaluation of interfacial strength between fiber and matrix based on cohesive zone modeling

Budiman

Takahashi

Inaba

et al. 2016

Composites Part A: Applied Science and Manufacturing

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“…A newer method, RGB photoelasticity, is a single image method that uses a look-up table and analysis of the intensity of the individual red, green and blue values from the digital camera to determine the stresses at any given point, which makes it possible to perform automatic photoelasticity on structures under dynamic loading. For a review on digital photoelastic methods, the reader is referred to [14].…”

Section: Figure 28: Photoelastic Fringe Ordermentioning

confidence: 99%

“…• Nikon D3200 digital single lens reflex camera on ball head stand, with 100-300mm f/5.6 zoom lens A fluorescent light source is desirable because it has higher resolution of higher order fringes [14]. A large light source with a diffuser is used instead of the traditional small incandescent light with collimator.…”

Section: Polariscopementioning

confidence: 99%

Experimental Validation of a Time to Instability Theory for Viscoelastic Rings

Lee¹

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A novel method of estimation of time to instability of viscoelastic structures has been developed by Dr. C. G. Merrett and has been applied to rings. This theory has applications to the nuclear industry as once the stability of viscoelastic rings is understood, the theory can be expanded to predict the stability of viscoelastic helical coils, which are found in the CANDU nuclear reactor as tight fitting spacers. The theory takes the elastic mechanics of a ring with a uniform pressure load, changes this pressure load to a two point load, applies the elastic-viscoelastic correspondence principle, and then uses Drozdov and Kolmanovskii's stability theory to estimate service life. A computer code using this theory plots the service life of a ring versus viscoelasticity and load.The objective of this project was to verify if the time to instability theory for viscoelastic rings is correct. Multiple polymethyl methacrylate (acrylic) rings were made and tested over a range of loads, and their times to failure were plotted and compared with the theory. Photoelasticity was used with polycarbonate rings to observe the changing stresses in a viscoelastic ring as it crept over time.The tests showed a decrease in life time of the rings as the load was increased from an average of 1774 seconds at 60 N to 203 s at 80 N, whereas the stability theory showed two times to failure over the load range, one being approximately 800s and the other being 35000s. The trend of the decreasing life with increasing load over the load range is clear in the experiments, and the lack of a similar trend in the theory does not appear to be correct. Further refinement of the theory to reflect this trend should be made, but more testing over a greater range of materials, loads and geometries should be performed to better confirm or disprove the theory.ii

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Review of RGB photoelasticity

Cited by 82 publications

References 87 publications

Photoelaticity and Its Application to Structural Analysis. A Review Based on Professor Vlatko Brčić Achievements

Photoelaticity and Its Application to Structural Analysis. A Review Based on Professor Vlatko Brčić Achievements

Evaluation of interfacial strength between fiber and matrix based on cohesive zone modeling

Experimental Validation of a Time to Instability Theory for Viscoelastic Rings

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