Extended Digital Image Correlation Method for Mapping Multiscale Damage in Concrete

Mamand, Heman; Chen, Jiye

doi:10.1061/(asce)mt.1943-5533.0002030

Cited by 10 publications

(3 citation statements)

References 24 publications

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“…DIC technology can establish the displacement field and strain field of the specimen surface by using a camera and receiving surface images of the specimen. Numerous experiments on specimens of other shapes have demonstrated the capacity of DIC for the study of the deformation characteristics and the stress variation [27,28]. For Brazilian disc specimens, Jin et al [14] captured the surface of concrete specimens using a DIC camera to evaluate the failure modes.…”

Section: Introductionmentioning

confidence: 99%

Mesoscale Study on Splitting Tensile Damage Characteristics of Concrete Based on X-ray Computed Tomography and Digital Image Correlation Technology

et al. 2022

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In this paper, the mesoscale damage properties of concrete and mortar were studied experimentally under Brazilian disc splitting tensile tests combining X-ray computed tomography (CT) and digital image correlation (DIC) technology. Considering the factors of water/cement ratios and loading rates, the influence of meso components on the macro tensile properties and failure modes of concrete were studied. The experimental results and analysis indicate that the following: (1) the existence of coarse aggregate makes the tensile strength of concrete lower than that of mortar and reduces the sensitivity of tensile strength to the loading rates; (2) the failure modes of mortar and concrete Brazilian discs differ in the crack initiation positions and localization phenomena. Under high loading rates, the local failure plays a critical role in the strength improvement of concrete; (3) for concrete, interface failure and mortar failure are the main failure modes under low loading rates, whereas aggregate failure gradually becomes the main failure mode with increasing loading rates. The decrease in water/cement ratios improves the strength of the mortar matrix and interfacial bonding performance, leading to more serious aggregate damage and higher strength.

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Section: Introductionmentioning

confidence: 99%

Mesoscale Study on Splitting Tensile Damage Characteristics of Concrete Based on X-ray Computed Tomography and Digital Image Correlation Technology

et al. 2022

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“…studied the influence of different threshold in the binarized images to best approach the width of cracks. Also, an extended digital image correlation, which includes a distance transform algorithm, was proposed by Mammand and Chen to detect microcracks in targetless concrete surfaces. However, because these works are related with the appearance of cracks, strains are the highest possible in concrete, and displacements will be at least those related with that maximum strains.…”

Section: Introductionmentioning

confidence: 99%

A method to measure small local strains in concrete surfaces using its natural texture and image cross‐correlation

Espinosa

Mas

2019

Struct Control Health Monit

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Summary This paper proposes a method to measure the displacement of every point on a concrete surface using its original surface texture and digital image cross‐correlation (DICC). The main advantage is that it does not need to add or attach any particular pattern or target to the surface, contrary to the current methods based in DICC. The method is tested in a concrete probe during loading–unloading cycles under its yield limit, with no cracks appearing in the surface. The total surface of the probe was tessellated in optimal local areas, and DICC with peak refinement was performed on each local area. In order to find the optimal size for that areas, we propose here a method based on the image local entropy. We show that, with natural nonoptimized textures, the proposed technique allows to locally measure the concrete deformation due to small strains (<0.1%) with an error below 50 με. Although results are more inaccurate than those obtained by a strain gauge, our method is able to noninvasively determine the strains in a concrete surface under small loads with reasonable accuracy, thus allowing its use in unreachable or historical structures where no attachment or target painting is possible.

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“…Digital image processing Digital image processing [41,42] was performed on concrete images with different damage degrees obtained in the numerical simulation of concrete damage under uniaxial compression in Section 4.1. In a grayscale image, the brightness of different colors represents a grayscale value, which can be divided into values from 0 to 255.…”

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confidence: 99%

Ultrasonic Coda Wave Experiment and Simulation of Concrete Damage Process under Uniaxial Compression

Song

Xue

et al. 2022

Buildings

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Using the coda wave interferometry (CWI) method to obtain the ultrasonic coda wave characteristics of loaded concrete is an important method to evaluate the mechanical response of concrete. In this paper, the ultrasonic coda wave characteristics of C40–C70 concrete specimens (four strengths of concrete) under uniaxial compression were tested by laboratory experiments. Furthermore, to clarify the relationship between the internal damage process of concrete and the change rate of coda wave velocity, an ultrasonic coda wave discrete element simulation model combined with digital image processing technology was established. The results show that the coda wave is very sensitive to small changes in the compressive damage to concrete, and the change in coda wave velocity can correspond to the development process of concrete damage. This research is conducive to a better understanding of the complex material behavior of compressive concrete and proves the feasibility of ultrasonic field simulation and processing by using numerical simulation images of concrete damage.

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Extended Digital Image Correlation Method for Mapping Multiscale Damage in Concrete

Cited by 10 publications

References 24 publications

Mesoscale Study on Splitting Tensile Damage Characteristics of Concrete Based on X-ray Computed Tomography and Digital Image Correlation Technology

Mesoscale Study on Splitting Tensile Damage Characteristics of Concrete Based on X-ray Computed Tomography and Digital Image Correlation Technology

A method to measure small local strains in concrete surfaces using its natural texture and image cross‐correlation

Ultrasonic Coda Wave Experiment and Simulation of Concrete Damage Process under Uniaxial Compression

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