A Comparative Study of Random Patterns for Digital Image Correlation

Stoilov, Georgi; Kavardzhikov, Vasil; Pashkouleva, Dessislava

doi:10.2478/v10254-012-0008-x

Cited by 58 publications

(36 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A critera for quantitative evaluation of random patterns and the characterization of effectiveness of DIC algorithm implementation and pattern printing on the surfaces of interest are introduced. (1) A practical approach for use in a mechanical testing laboratory to optimize the performance of DIC was proposed. (2) This approach allowed estimation of the average speckle size, as well as the scatter of speckle sizes, to maximize spatial resolution.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of the Thermal Strain of Gas Jet-Assisted Laser Percussion Drilling

2016

Sensors and Materials

View full text Add to dashboard Cite

In this work, a digital image correlation technique in combination with laser hole drilling to measure the residual thermal strain is presented. The significant potential benefits of this work are non-contact, high speed, and on-line measurement. The ring-core based groove in the surface of a specimen was drilled concentrically to induce thermal stresses inside the core. These deformations can be measured by a digital image correlation technique for measuring relieved strains. We also investigated the size of the reference areas on the specimens and tracked these areas after the laser hole drilling process. The proposed method was applied to characterize the thermal effect produced by laser milling for aluminum alloy Al5052 under plane strain tension conditions, and the results were compared with four assisted laser milling approaches.

show abstract

Section: Introductionmentioning

confidence: 99%

Characteristics of the Thermal Strain of Gas Jet-Assisted Laser Percussion Drilling

2016

Sensors and Materials

View full text Add to dashboard Cite

show abstract

“…Special attention was paid to the ability of the pattern to provide high-accuracy measurements at deformations reaching 5%, at which poor patterns fail [41]. The evaluation and testing of patterns was performed using own MATLAB scripts by placing virtual extensometers at the edges of the tested samples.…”

Section: Virtual Stretching Of Patterns and Texturesmentioning

confidence: 99%

Assessment of 2d-Dic Stochastic Patterns

Antoš

Nežerka

Somr

2017

APP

View full text Add to dashboard Cite

Abstract. Cost of experimental testing of materials and structures subjected to mechanical loading often constitutes a significant portion of a project budget. Therefore a collection of data in a maximum possible amount is desirable. Extensometers and strain-gauges attached to the specimen surface often fail and cannot provide full-field information about the development of displacements and strains. Digital Image Correlation (DIC) is capable of providing such information. Unsuitable texture or artificially applied pattern, essential for DIC analysis, can spoil the DIC outcomes completely. An additional investment into preparation of new experimental testing can be avoided with the use of tools employing algorithms for stochastic pattern assessment. The development of such algorithms and their implementation into an open-source DIC software is the goal of the presented research.

show abstract

“…Digital image correlation (DIC) is a non-destructive, non-contact and precise method for crack measurements in reinforced concrete elements [23][24][25][26][27]. This method is of interest for monitoring at different loading stages in real time.…”

mentioning

confidence: 99%

About the Possible Limitations in the Usage of the Non-Destructive Ultrasonic Pulse Velocity Method for Assessment of Cracks in Reinforced Concrete Structures, Subjected to Direct Environmental Exposure

Ivanchev

Slavchev

2019

Buildings

View full text Add to dashboard Cite

Failures occur in the structures of reinforced concrete buildings and facilities during their continuous exploitation, without being overloaded or exposed to extreme impacts, the most common being cracks. Their detection and change in time are related to the assessment of the state of the structures, their safety, and reliability during their construction and especially for their safety exploitation. This paper describes the results of the experimental studies conducted by authors aiming to verify the possibility of using the non-destructive ultrasonic pulse velocity method (NDUPVM) for detection and evaluation of cracks. Results of an experimental study of 12 reinforced concrete beams are presented. In previous experiments, some of them were subjected to bending until the maximum crack width of 0.3 mm was reached and others until yielding of the longitudinal reinforcement. The results obtained from the measurements of the depths of the normal cracks with different widths with NDUPVM were compared with the visually measured ones. In the present research cracks with the same width and with a similar depth were chosen. The influence of extreme external conditions to the accuracy of the measured crack depths by the NDUPVM was investigated. Non-destructive ultrasonic research was done by a portable device Proceq TICO.

show abstract

A Comparative Study of Random Patterns for Digital Image Correlation

Cited by 58 publications

References 16 publications

Characteristics of the Thermal Strain of Gas Jet-Assisted Laser Percussion Drilling

Characteristics of the Thermal Strain of Gas Jet-Assisted Laser Percussion Drilling

Assessment of 2d-Dic Stochastic Patterns

About the Possible Limitations in the Usage of the Non-Destructive Ultrasonic Pulse Velocity Method for Assessment of Cracks in Reinforced Concrete Structures, Subjected to Direct Environmental Exposure

Contact Info

Product

Resources

About