Recent developments and applications for optical full field strain measurement using ESPI and DIC

Siebert, Thorsten; Schubach, Hans Reinhard; Splitthof, Karsten

doi:10.1117/12.891864

Cited by 5 publications

(5 citation statements)

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“…The resolution of DIC is often claimed to be around 0.01 pixels for displacement measurements [10,11] and 40-50 με for strain measurements [3,12]. The measurement errors in DIC have been extensively studied and discussed in the literature [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

The systematic error in digital image correlation induced by self-heating of a digital camera

Pang

2012

Meas. Sci. Technol.

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The systematic strain measurement error in digital image correlation (DIC) induced by self-heating of digital CCD and CMOS cameras was extensively studied, and an experimental and data analysis procedure has been proposed and two parameters have been suggested to examine and evaluate this. Six digital cameras of four different types were tested to define the strain errors, and it was found that each camera needed between 1 and 2 h to reach a stable heat balance, with a measured temperature increase of around 10 °C. During the temperature increase, the virtual image expansion will cause a 70–230 µε strain error in the DIC measurement, which is large enough to be noticed in most DIC experiments and hence should be eliminated.

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Section: Introductionmentioning

confidence: 99%

The systematic error in digital image correlation induced by self-heating of a digital camera

Pang

2012

Meas. Sci. Technol.

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“…In the last few years, the measurement accuracy of the 2D‐DIC system has been greatly improved to benefit from these theories and studies. The resolution of computed displacement with a typical DIC method is around ±0.1 to 0.01 pixel . Even the bias of computed displacement can achieve 0.004 pixels .…”

Section: Development Of 2d‐dic Algorithmsmentioning

confidence: 98%

“…The resolution of computed displacement with a typical DIC method is around ±0.1 to 0.01 pixel. 59 Even the bias of computed displacement can achieve 0.004 pixels. 60 When the calculation results of high-precision measurements are required, the design of the algorithm and details of setting the user preferences and image acquisition process are needed.…”

Section: In Terms Of Measurement Accuracymentioning

confidence: 99%

The state of the art of two‐dimensional digital image correlation computational method

Zhao

Sang

Duan

2019

Engineering Reports

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After remarkable work over the last three decades, digital image correlation (DIC) computational technique has made incredible progress under the unremitting efforts of numerous researchers, and it has already grown into one of the most powerful and nondestructive surface deformations measuring methods used in various areas of experimental mechanics. DIC is done by tracking the regional variation of gray‐scale features between two succession images recorded before and after deformation. The objective of this paper is to report on the development of 2D‐DIC. In this paper, we first describe the basic principle of the DIC algorithm. The second part mainly focuses on some important progress and interesting problems of the algorithm in the term of computational efficiency and measurement accuracy. Moreover, the major error sources that may exist in practical DIC measurement are discussed in detail. Finally, some typical application domains of DIC method are listed. This paper intends to help preliminary researchers who are of interest in 2D‐DIC algorithms to improve their understanding of this measurement technique.

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“…Optical techniques were also used for full-field stress measurement for in situ structural health monitoring of airframe components [17]. Siebert et al [18] presented recent developments and applications for optical full-field strain measurement using ESPI and DIC. In this research, the ESPI technique was applied for determination of strain under static loading in composite and inhomogeneous materials and was applied for optimisation of the design of components in automotive applications.…”

Section: Introductionmentioning

confidence: 99%

Suitability of DIC and ESPI optical methods for monitoring fatigue damage development in X10CrMoVNb9-1 power engineering steel

Kopeć

Brodecki

Kukla

et al. 2021

Archiv.Civ.Mech.Eng

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The aim of this research was to compare the effectiveness of two different optical measurement techniques (digital image correlation—DIC and electronic speckle pattern interferometry—ESPI) during fatigue damage development monitoring in X10CrMoVNb9-1 (P91) power engineering steel for pipes. The specimens machined from the as-received pipe were subjected to fatigue loadings and monitored simultaneously using DIC and ESPI techniques. It was found that DIC technique, although characterised by lower resolution, was more effective than ESPI. DIC allows to monitor the fatigue behaviour of steel specimens and accurately indicate the area of potential failure even within the initial stage of fatigue damage development.

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Recent developments and applications for optical full field strain measurement using ESPI and DIC

Cited by 5 publications

References 0 publications

The systematic error in digital image correlation induced by self-heating of a digital camera

The systematic error in digital image correlation induced by self-heating of a digital camera

The state of the art of two‐dimensional digital image correlation computational method

Suitability of DIC and ESPI optical methods for monitoring fatigue damage development in X10CrMoVNb9-1 power engineering steel

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