Academic literature on the topic 'Three-dimensional Digital Image Correlation (DIC)'
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Journal articles on the topic "Three-dimensional Digital Image Correlation (DIC)"
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Réthoré, Julien, Jean-Philippe Tinnes, Stéphane Roux, Jean-Yves Buffière, and François Hild. "Extended three-dimensional digital image correlation (X3D-DIC)." Comptes Rendus Mécanique 336, no. 8 (2008): 643–49. http://dx.doi.org/10.1016/j.crme.2008.06.006.
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Zhang, Chuang, Cong Liu, and Zhihong Xu. "High-Accuracy Three-Dimensional Deformation Measurement System Based on Fringe Projection and Speckle Correlation." Sensors 23, no. 2 (2023): 680. http://dx.doi.org/10.3390/s23020680.
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Fringe projection profilometry (FPP) and digital image correlation (DIC) are widely applied in three-dimensional (3D) measurements. The combination of DIC and FPP can effectively overcome their respective shortcomings. However, the speckle on the surface of an object seriously affects the quality and modulation of fringe images captured by cameras, which will lead to non-negligible errors in the measurement results. In this paper, we propose a fringe image extraction method based on deep learning technology, which transforms speckle-embedded fringe images into speckle-free fringe images. The principle of the proposed method, 3D coordinate calculation, and deformation measurements are introduced. Compared with the traditional 3D-DIC method, the experimental results show that this method is effective and precise.
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Atkinson, Devan, and Thorsten Hermann Becker. "Stereo Digital Image Correlation in MATLAB." Applied Sciences 11, no. 11 (2021): 4904. http://dx.doi.org/10.3390/app11114904.
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Digital Image Correlation (DIC) has found widespread use in measuring full-field displacements and deformations experienced by a body from images captured of it. Stereo-DIC has received significantly more attention than two-dimensional (2D) DIC since it can account for out-of-plane displacements. Although many aspects of Stereo-DIC that are shared in common with 2D DIC are well documented, there is a lack of resources that cover the theory of Stereo-DIC. Furthermore, publications which do detail aspects of the theory do not detail its implementation in practice. This literature gap makes it difficult for newcomers to the field of DIC to gain a deep understanding of the Stereo-DIC process, although this knowledge is necessary to contribute to the development of the field by either furthering its capabilities or adapting it for novel applications. This gap in literature acts as a barrier thereby limiting the development rate of Stereo-DIC. This paper attempts to address this by presenting the theory of a subset-based Stereo-DIC framework that is predominantly consistent with the current state-of-the-art. The framework is implemented in practice as a 202 line MATLAB code. Validation of the framework shows that it performs on par with well-established Stereo-DIC algorithms, indicating it is sufficiently reliable for practical use. Although the framework is designed to serve as an educational resource, its modularity and validation make it attractive as a means to further the capabilities of DIC.
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Shao, Xinxing, Jingye Qu, and Wenwu Chen. "Single-Camera Three-Dimensional Digital Image Correlation with Enhanced Accuracy Based on Four-View Imaging." Materials 16, no. 7 (2023): 2726. http://dx.doi.org/10.3390/ma16072726.
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Owing to the advantages of cost-effectiveness, compactness, and the avoidance of complicated camera synchronization, single-camera three-dimensional (3D) digital image correlation (DIC) techniques have gained increasing attention for deformation measurement of materials and structures. In the traditional single-camera 3D-DIC system, the left and right view images can be recorded by a single camera using diffraction grating, a bi-prism, or a set of planar mirrors. To further improve the measurement accuracy of single-camera 3D-DIC, this paper introduces a single-camera four-view imaging technique by installing a pyramidal prism in front of the camera. The 3D reconstruction of the measured points before and after deformation is realized with eight governing equations induced by four views, and the strong geometric constraints of four views can help to improve the measurement accuracy. A static experiment, a rigid body translation experiment, and a four-point bending experiment show that the proposed single-camera 3D-DIC method can achieve higher measurement accuracy than the dual-view single-camera 3D-DIC techniques and that the single-camera 3D-DIC method has advantages in reducing both random error and systematic error.
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Shadmehri, Farjad, and Suong Van Hoa. "Digital Image Correlation Applications in Composite Automated Manufacturing, Inspection, and Testing." Applied Sciences 9, no. 13 (2019): 2719. http://dx.doi.org/10.3390/app9132719.
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Since its advent in the 1970s, digital image correlation (DIC) applications have been rapidly growing in different engineering fields including composite material testing and analysis. DIC combined with a stereo camera system offers full-field measurements of three-dimensional shapes, deformations (i.e., in-plane and out-of-plane deformations), and surface strains, which are of most interest in many structural testing applications. DIC systems have been used in many conventional structural testing applications in composite structures. However, DIC applications in automated composite manufacturing and inspection are scarce. There are challenges in inspection of a composite ply during automated manufacturing of composites and in measuring transient strain during in-situ manufacturing of thermoplastic composites. This article presents methodologies using DIC techniques to address these challenges. First, a few case studies where DIC was used in composite structural testing are presented, followed by development of new applications for DIC in composite manufacturing and inspection.
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Barišić, Ivana, Tihomir Dokšanović, and Matija Zvonarić. "Pavement Structure Characteristics and Behaviour Analysis with Digital Image Correlation." Applied Sciences 13, no. 1 (2023): 664. http://dx.doi.org/10.3390/app13010664.
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Digital image correlation (DIC) is a method of point displacement measurement by an optical system. If two cameras are used for capturing the same point displacement, three-dimensional data are obtained using the 3D-DIC method. The areas of application of this method in pavement construction are diverse, but it is mainly used for displacement monitoring during standard tests of the failure of specimens due to load application. Furthermore, DIC technology was used only for testing particular material characteristics and assuming their influence on the overall pavement system. Within this research, DIC was applied in two areas: defining material mechanical characteristics and analyses of pavement structure behaviour under cyclic loading. The scope of this research was to gain more insights into DIC’s potential application within pavement behaviour analyses, specifically on cement-bound granular material (CBGM) characterisation. Results from this study confirm the suitability of 3D-DIC technology for pavement material characterisation. Furthermore, it is shown that certain trends of material behaviour defined on the simple material level of each independent pavement layer will significantly differ when it is placed in the system, and this kind of complex analysis is possible by using 3D-DIC technology.
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Liao, Yi-Hong, Manzhu Xu, and Song Zhang. "Digital image correlation assisted absolute phase unwrapping." Optics Express 30, no. 18 (2022): 33022. http://dx.doi.org/10.1364/oe.470704.
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This paper presents an absolute phase unwrapping method for high-speed three-dimensional (3D) shape measurement. This method uses three phase-shifted patterns and one binary random pattern on a single-camera, single-projector structured light system. We calculate the wrapped phase from phase-shifted images and determine the coarse correspondence through the digital image correlation (DIC) between the captured binary random pattern of the object and the pre-captured binary random pattern of a flat surface. We then developed a computational framework to determine fringe order number pixel by pixel using the coarse correspondence information. Since only one additional pattern is used, the proposed method can be used for high-speed 3D shape measurement. Experimental results successfully demonstrated that the proposed method can achieve high-speed and high-quality measurement of complex scenes.
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Peng, Mingkai, Yi-Chieh Ho, Wei-Chung Wang, Ying Hei Chui, and Meng Gong. "Measurement of wood shrinkage in jack pine using three dimensional digital image correlation (DIC)." Holzforschung 66, no. 5 (2012): 639–43. http://dx.doi.org/10.1515/hf-2011-0124.
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Abstract Dimensional stability is one of the most important properties of lumber. Shrinkage is especially critical in this regard. In this study, longitudinal, radial and tangential shrinkages in jack pine (Pinus banksiana) have been found to be 0.4, 3.3 and 5.7%, respectively, by means of three dimensional digital image correlation (3D DIC). Full field shrinkage data were extracted from two types of specimen. It was demonstrated that the 3D DIC method is a suitable method of providing localized shrinkage values. The shrinkages in the three anatomical dimensions exhibit different variation patterns from pith to bark. Detailed shrinkage measurements provided data for a better understanding and modeling of shrinkage within a tree stem, which could be useful for lumber distortion simulation.
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Khoo, Sze-Wei, Saravanan Karuppanan, and Ching-Seong Tan. "A Review of Surface Deformation and Strain Measurement Using Two-Dimensional Digital Image Correlation." Metrology and Measurement Systems 23, no. 3 (2016): 461–80. http://dx.doi.org/10.1515/mms-2016-0028.
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Abstract Among the full-field optical measurement methods, the Digital Image Correlation (DIC) is one of the techniques which has been given particular attention. Technically, the DIC technique refers to a non-contact strain measurement method that mathematically compares the grey intensity changes of the images captured at two different states: before and after deformation. The measurement can be performed by numerically calculating the displacement of speckles which are deposited on the top of object’s surface. In this paper, the Two-Dimensional Digital Image Correlation (2D-DIC) is presented and its fundamental concepts are discussed. Next, the development of the 2D-DIC algorithms in the past 33 years is reviewed systematically. The improvement of 2DDIC algorithms is presented with respect to two distinct aspects: their computation efficiency and measurement accuracy. Furthermore, analysis of the 2D-DIC accuracy is included, followed by a review of the DIC applications for two-dimensional measurements.
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Felipe-Sesé, Luis, Ángel Molina-Viedma, Elías López-Alba, and Francisco Díaz. "RGB Colour Encoding Improvement for Three-Dimensional Shapes and Displacement Measurement Using the Integration of Fringe Projection and Digital Image Correlation." Sensors 18, no. 9 (2018): 3130. http://dx.doi.org/10.3390/s18093130.
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Three-dimensional digital image correlation (3D-DIC) has become the most popular full-field optical technique for measuring 3D shapes and displacements in experimental mechanics. The integration of fringe projection (FP) and two-dimensional digital image correlation (FP + DIC) has been recently established as an intelligent low-cost alternative to 3D-DIC, overcoming the drawbacks of a stereoscopic system. Its experimentation is based on the colour encoding of the characterized fringe and speckle patterns required for FP and DIC implementation, respectively. In the present work, innovations in experimentation using FP + DIC for more accurate results are presented. Specifically, they are based on the improvement of the colour pattern encoding. To achieve this, in this work, a multisensor camera and/or laser structural illumination were employed. Both alternatives are analysed and evaluated. Results show that improvements both in three-dimensional and in-plane displacement are obtained with the proposed alternatives. Nonetheless, multisensor high-speed cameras are uncommon, and laser structural illumination is established as an important improvement when low uncertainty is required for 2D-displacement measurement. Hence, the uncertainty has been demonstrated to be reduced by up to 50% compared with results obtained in previous experimental approaches of FP + DIC.
Dissertations / Theses on the topic "Three-dimensional Digital Image Correlation (DIC)"
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Saleh, Mohamed. "Electromechanical behaviour of three-dimensional (3D) woven composite plates." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/electromechanical-behaviour-of-threedimensional-3d-woven-composite-plates(cd06f8ef-88e0-45dd-be65-3911345212ba).html.
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Three dimensional (3D) woven composites have attracted the interest of academia and industry thanks to their damage tolerance characteristics and automated fabric manufacturing. Although much research has been conducted to investigate their out-of-plane "through thickness" properties, still their in-plane properties are not fully understood and rely on extensive experimentation. The aim of this work is to study the electromechanical behaviour of three different fibre architectures of 3D woven composites "orthogonal (ORT), layer-to-layer (LTL) and angle interlock (AI)" loaded, in three different orientations "warp (0º), weft (90º) and off-axis (45º)", in quasi-static tension. Stress/strain response is captured as well as damage initiation and evolution up to final failure. The ORT architecture demonstrated a superior behaviour, in the off-axis direction, demonstrated by high strain to failure (~23%) and high translaminar energy absorption (~40 MJ/m3). The z-binder yarns in ORT suppress delamination and allow larger fibre rotation during the fibre "scissoring motion" that enables further strain to be sustained. In-situ electrical resistance variation is monitored using a four-probe technique to correlate the resistance variation with the level of damage induced while loading. Monotonic and cyclic "load/unload" tests are performed to investigate the effect of piezo-resistivity and residual plasticity on resistance variation while damage is captured by X-ray scanning during interrupted tests at predefined load levels. In addition, this study investigates the potential of using 3D woven composites in joint assemblies through open-hole tension and "single fastener double-lap joint" bearing strength tests. 3D woven composites in the off-axis orientation, especially ORT, demonstrate a potential for overcoming some of the major challenges for composite joints' applications which are the pseudo-ductility, stress redistribution away from the notch and notch insensitivity. Finally, the study proposes a micro-mechanics based damage model to simulate the response of 3D orthogonal woven composites loaded in tension. The proposed model differs from classical damage mechanics approaches in which the evolution law is obtained by retrofitting global experimental observations.
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Gadepalli, Prasanna Chaitanya. "USING THREE-DIMENSIONAL DIGITAL IMAGE CORRELATION TO FIND STRAINS IN STRUCTURAL POLYMER FOAM." University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron1595947881930553.
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Chen, Yang. "Damage mechanisms in SiC/SiC composite tubes : three-dimensional analysis coupling tomography imaging and numerical simulation." Thesis, Paris Est, 2017. http://www.theses.fr/2017PESC1056/document.
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Du fait de leurs propriétés physiques et chimiques exceptionnelles à haute température par rapport aux métaux, les composites de carbure de silicium (SiC) sont étudiés comme éventuel matériau de gainage du combustible nucléaire dans les réacteurs de fusion ou fission avancée futurs, ainsi que, depuis plus récemment, dans les réacteurs à eau légère existants. Les tubes composites SiC/SiC tressés en 2D, fabriqués par procédé d'infiltration chimique en phase vapeur (CVI), présentent un comportement mécanique anisotrope, faiblement déformable (~ 1%). La maîtrise des relations entre la microstructure, l’endommagement et le comportement macroscopique est essentielle pour optimiser précisément le dimensionnement structurel de ce matériau pour les applications envisagées. Un paramètre de fabrication important est l'angle de tressage, angle entre les torons de fibres et l'axe du tube. L'objectif de ce travail est de fournir une compréhension détaillée de la relation endommagement-microstructure, en particulier des effets de l'angle de tressage sur les mécanismes d’endommagement. Dans ce but, une étude combinant observations expérimentales à macro et micro-échelle et simulations numériques est menée. Les tubes composites sont d’abord étudiés par des essais de traction in situ sous tomographie par rayons X. Les expériences ont été réalisées sur la ligne PSICHE du synchrotron SOLEIL sous faisceau rose polychromatique. Les images tridimensionnelles sont analysées par la technique de corrélation d’image volumique (DVC), complétée par une série d'algorithmes de traitement d'image originaux, développés spécifiquement pour analyser les microstructures 3D, mesurer les déformations à travers l'épaisseur du tube, détecter et caractériser quantitativement le réseau de microfissures créées par le chargement mécanique. De plus, les microstructures réelles, décrites par les images de haute résolution issues des tests in situ, sont utilisées dans les simulations numériques multi-échelle. Les champs de contrainte à l’échelle microstructurale sont calculés en régime élastique par une technique utilisant la transformée de Fourier rapide (FFT). Ils permettent de mieux comprendre l'initiation des fissures et d’interpréter les observations expérimentales par une comparaison directe. Ces approches expérimentales et numériques sont appliquées à trois tubes présentant différents angles de tressage (30 °, 45 ° et 60 °). L’influence de l'angle de tressage sur l'initiation et l'évolution de l’endommagement à cœur des composites est ainsi mise en évidence<br>Because of their outstanding physical and chemical properties at high temperature, in comparison with metals, silicon carbide (SiC) composite materials are studied as possible nuclear fuel cladding materials either for future advanced fission/fusion reactors, or more recently, for the currently existing light water reactors. 2D-braided SiC/SiC composite tubes, manufactured by chemical vapor infiltration (CVI), exhibit an anisotropic, hardly deformable (~1%) mechanical behavior. Understanding the relations between the microstructure, the damage mechanisms and the macroscopic behavior is essential to optimize the structural design of this material for the considered applications. One important manufacturing parameter is the braiding angle, i.e. the angle between the fiber tows and the tube axis. The objective of this work is to provide a comprehensive understanding of the damage-microstructure relations, in particular of the effects of the braiding angle on the damage mechanisms. For this purpose, an investigation combining experimental observations at macro and micro-scale and numerical simulations is developed. The composite tubes are first studied through in situ tensile testing under X-ray computed tomography. Experiments were carried out on the PSICHE beamline at synchrotron SOLEIL using a pink polychromatic beam. The recorded 3D images are processed using the digital volume correlation (DVC) technique, extended by a series of advanced image processing algorithms specifically developed in order to analyze the 3D microstructures, to measure the deformations through the tube thickness, and to detect and quantitatively characterize the network of micro-cracks created by the mechanical loading. In addition, numerical simulations are performed on the real microstructures as observed in the high-resolution images recorded during the in situ tests. Stress fields are calculated at the microstructural scale in the elastic regime using a numerical tool based on the Fast Fourier Transform (FFT). They help to better understand crack initiation and interpret the experimental observations within one-to-one comparisons. Both the experimental and numerical approaches are applied to three tubes with different braiding angles (30°, 45° and 60°). The effect of the braiding angle on the initiation and evolution of damage in the bulk of the composite materials can thus be highlighted
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El-Hajjaji, Abdellah. "Traitement numérique en 3D d'un couple d'images stéréo du satellite SPOT." Rouen, 1993. http://www.theses.fr/1993ROUES028.
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L'objectif de notre recherche est d'extraire les altitudes h d'une scène donnée prise en image sous deux angles différents donnés par le satellite SPOT. Dans ce but nous avons modélisé le mouvement du satellite et de son système optique afin de transformer les deux images initiales en images épipolaires, ce qui nous permettra de réduire le temps d'appariement et de trouver les pixels homologues avec succès. Pour la mise en correspondance, nous avons utilisé une technique qui est à base de la corrélation et de la programmation dynamique. Cette méthode nous a permet d'apparier 96 % des pixels homologues avec une erreur inférieure à 5 mètres. Ce problème de mise en correspondance reste toujours ouvert<br>The aim of our research was to extract the level h of a precise landscape taken over two differents angles by the satellite SPOT. To do so, we have modelised the movement of the satellite and his optical system to transform the two first images in another one, epipolar which will allow us to reduce the matching time and to find with success the equivalent pixels. For the pairing, we have utilised a technic wich is based on the corrolation and of the dynamic programming. This method was very satisfactory and allow us to match 96 % of the equivalent pixels, with an error of less than 5 meters, but the original problem is still a matter of research for complimentary studing
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Chen, Bo-Fu, and 陳柏甫. "NEW CALIBRATION PROCEDURES OF THREE-DIMENSIONAL DIGITAL IMAGE CORRELATION METHOD." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/24527800875719144019.
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CHOU, YAO-TANG, and 周曜堂. "INSPECTION OF INTERNAL DEFECTS IN CFRP CIRCULAR TUBES BY THREE-DIMENSIONAL DIGITAL IMAGE CORRELATION METHOD." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/57620290650574548140.
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Huang, Yu-Nien, and 黃右年. "Development of Real-Time Stereo Digital Image Correlation Tracking System for Three-Dimensional Dynamic Measurement." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/w256r9.
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碩士<br>國立臺灣大學<br>機械工程學研究所<br>106<br>Digital image correlation (DIC) is a convenient and practical optical metrology for non-contacting and full-field deformation measurement of structures, which has been commonly accepted and widely used in the field of experimental mechanics. This thesis mainly contributes to develop real-time digital image correlation tracking system, which integrates the calibration of the camera, numerical analysis, and the display of result in real-time. Compared to a traditional DIC experiment, the development of the real-time DIC system improves the efficiency of an experiment, and fits more for the industry. In this thesis, the precision of the DIC algorithm is proved to be 0.01pixel by the interpolation of standard testing image, and the real-time DIC system is able to process 30 images within a second with Matlab program. Practically, the real-time DIC system is capable of measuring the complicated 2D movement of the alignment stage immediately. Also, this thesis combines the real-time DIC system and the alignment stage, and the feedback control system can maintain the target in the center of the image. Furthermore, the single point system is upgraded to a multi points tracking system, which can be used to measure the heat deformation of a spindle for a long period of time. The scale of the deformation is about 10 micro meter, and the system can provide the real-time strain value between points. The thermal expansion coefficient can also be obtained from the information of thermal couple. Afterwards, this thesis discusses camera calibration. With the integration of calibration technique and the real-time DIC system, the lens distortion effect can be solved and image measurement won’t be constrained by the hardware anymore. Besides lens distortion, keystone effect is also a serious problem. This thesis calculates the specified scale factor by the intrinsic and extrinsic camera matrix, and obtained all the scale factor of the image using second time surface fitting. The real-time DIC system then can measure the difference of depth using a single vision. Finally, the single vision system is further developed to binocular vision system, which is the real-time stereo DIC system. The system has the ability to measure the complete process of 3D movement, construct complicated 3D surface, and provide the center of gravity of an object. Additionally, this thesis uses the real-time stereo DIC system to measure the movement of a coordinate measuring machine and a robotic arm.
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Chen, Liang-Chih, and 陳亮至. "Development of Stereo Digital Image Correlation Technique for Three-dimensional Static and Dynamic Precision Deformation Measurement of Structures." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/21487948991509774701.
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碩士<br>國立臺灣大學<br>機械工程學研究所<br>104<br>Digital image correlation (DIC) is a convenient and practical optical metrology for non-contacting and full-field deformation measurement of structures, which has been commonly accepted and widely used in the field of experimental mechanics. This thesis mainly contribute to develop high-accuracy sub-pixel image matching algorithm in home-made 2D DIC and Stereo DIC software, and apply to mechanical engineering (dynamic measurement), civil engineering (static measurement) and biomechanics. Firstly, an inverse compositional Gauss-Newton (IC-GN) algorithm with projective shape function is proposed, and compares IC-GN method with first-order and second-order shape function measurement accuracy in different deformation conditions of 2D and stereo matching. Measurement accuracy of the 2D DIC software is verified by SEM DIC Challenge testing images. The strategy of 2D and stereo matching of stereo DIC software is presented, based on different features of shape functions.
Secondly, a Stereo DIC system include a high-speed camera and a set of mirrors is applied to dynamic measurement. This method can remove the synchronization and solve the high-costing problem with two high-speed camera system. In addition, a new technique is proposed to find the mode shape of structures by band-pass-filter method. The resonance frequency, resonance mode shape and full-field transient displacement response of a cantilever thin plate are measured by single high-camera Stereo DIC system. The Fotonic sensor (FS) displacement measurement instrument, theory and finite element method (FEM) are used to verify the measurement result of the Stereo DIC technique. Thirdly, in static measurement, 2D DIC and Stereo DIC software are applied to the cyclic tests of cylindrical concrete containment structure in nuclear power plant. The three-dimensional deformation, vertical strain, horizontal strain, open crack width, position and slide of shear crack of RC containment structure are measured and are discussed in detail. Finally, an irregular template subset and second-order shape function of IC-GN method is applied to cardiac medical image tracking. This method is used to analyze cardiac ultrasound images and cardiac magnetic resonance images. The result is compared with the measurement result of the commercial software and artificial analysis.
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WANG, YI-HAO, and 王奕皓. "A Study on the Accuracy Improvement of Three-Dimensional Measurement by Using Digital Image Correlation Method to Position Control Points." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/fsg8nq.
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碩士<br>國立高雄大學<br>土木與環境工程學系碩士班<br>106<br>In recent years, the unmanned aerial vehicle (UAV) is getting popular, and related applications are also fully developed. It can be used to take aerial photos. In order to obtain the geomorphology of the whole area, it has to rely on the technology of image stitching. High-accuracy control points are important to regulate the coordinate of stitching images and achieve high-accuracy three-dimensional digital model. This study uses the Digital Image Correlation Method (DIC) to position the control points in order to improve the accuracy of the control points.
This study uses Global navigation Satellite System (GNSS) receivers to measure the coordinates of control points. Real-time Kinematic (RTK) technique is adopted. So, this study explores the influence of time on RTK. The result shows that, in the same day, even if the observation period is different, the result of positioning moves less than 2 cm in horizontal, 2.5 cm in vertical. In the same observation period but different day, most of the result of positioning moves less than 2 cm in horizontal, 2.5 cm in vertical. This result shows that using GNSS receivers along with RTK technique to measure the coordinate of control points is reliable.
Then, 8 control points and 7 check points are chosen from 20 candidate control points in this study. These points are imported into Pix4Dmapper, and the accuracy of check points by two different control point positioning methods is explored. One of the positioning methods is done by manual. The other determines the control point in the first image by manual, and then using DIC to find the control point on the rest of the images. And the study also explores the influent of the numbers of the images including the control points on the accuracy of check points. The result shows that DIC can improve the accuracy of control point positioning. However, the improvements in x- and y-direction are different. The flying direction of UAV could be the reason for this phenomenon. If higher resolution images could be used to raise the match precision while using DIC, this phenomenon could be improved.
Book chapters on the topic "Three-dimensional Digital Image Correlation (DIC)"
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James, Valontino, and Pilate Moyo. "Fatigue Behaviour of Patch-Repaired and CFRP Strengthened Reinforced Concrete Beams." In Springer Proceedings in Materials. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-72955-3_39.
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AbstractThe service life of corrosion-damaged reinforced concrete (RC) infrastructure can be improved through patch repairs and structural strengthening. However, the effect of varying corrosion damage and patch repair extent has not yet been clearly pronounced. The fatigue performance of corrosion-damaged RC beams that have been patch repaired to varying lengths and subsequently strengthened with carbon fibre-reinforced polymer (CFRP) laminates was evaluated by conducting four-point bending tests and cyclic load tests on simply supported beams. Three criteria were identified to evaluate performance: fatigue life, crack development and stiffness degradation. Various data acquisition techniques, such as neutral axis DEMEC strain targets, strain gauges, linear variable differential transducers (LVDT) and digital image correlation (DIC) were employed to investigate these performance criteria. The experimental results indicated that an increase in corrosion damage and patch repair extent lowered the ultimate static failure load and increased fatigue life. An increase in specimen stiffness was observed for the specimens with the longer damage extent compared to the specimens with the shorter damage extent, where stiffness was gauged in terms of midspan deflection, composite material strain and neutral axis shift. Moreover, the results yielded through the DIC process showed potential to identify potential failure locations, quite early in the specimen fatigue life by comparison of tangential strain, peak vertical deflection and the eventual failure location.
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Wydra, Małgorzata, Grzegorz Sadowski, Piotr Dolny, and Jadwiga Fangrat. "Crack Propagation Analysis of Model Concrete Columns with BFRP Reinforcement Bars." In Springer Proceedings in Materials. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-72955-3_43.
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AbstractAvailable studies on concrete structural parts with FRP reinforcement bars concern mostly investigations on bent elements (beams, slabs) [1, 2]. There are also available a few theoretical analyses on columns [3–5]. Though, there is still little experimental data concerning concrete columns with FRP bars [6–8], especially subjected to eccentric load, as also underlined in the review article [9]. This research aims to fulfill this research gap. Also, basalt FRP bars were chosen as relatively new type of non-metallic bars with low ecological impact [1].A total of eight columns with the height of either 750 mm or 1500 mm having 150 mm x 150 mm rectangular cross section were examined under axial or eccentric mechanical load up to 290 kN. Columns were reinforced with four BFRP main bars with the diameter of either 8 or 10 mm, and 8 mm steel stirrups in each case. The results on the thermal and mechanical properties’ investigations on BFRP bars were presented in [10]; the compressive strength values of the used BFRP bars were in the range of 441.2–466.8 MPa and elasticity modulus at compression values were equal to 31.0–38.4 GPa. Tested compressive strength of concrete, from which all columns were made (in one concrete pouring) were equal to 33.8 MPa. Each column was loaded in three cycles of loading-unloading, increasing the eccentricity, from 0 to 2 cm, and finally to 4 cm. DIC (Digital Image Correlation) method was used for the analysis of crack propagation (as in earlier research of bent elements [11]), but also unexpectedly there were visualised intensification areas of compression micro-damages. Failure was noted for two elements - B075_8_2 at the eccentricity of 4 cm (failure load – 290 kN after 60 s of sustained load) and B150_10_2 at the eccentricity of 4 cm (280 kN). Other specimens did not fail under load up to 290 kN. Maps from DIC method were also compared with results from numerical modelling (in Abaqus software) with good resemblance.
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Gubbels, Wade, and Gary S. Schajer. "Three-Dimensional Digital Image Correlation Using a Single Color-Camera." In Advancement of Optical Methods in Experimental Mechanics, Volume 3. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-06986-9_36.
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Kumar, Rajesh, and Iniyan Thiruselvam. "Mechanics of Novel Double-Rounded-V Hierarchical Auxetic Structure: Finite Element Analysis and Experiments Using Three-Dimensional Digital Image Correlation." In Additive and Advanced Manufacturing, Inverse Problem Methodologies and Machine Learning and Data Science, Volume 4. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-50474-7_5.
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Silva Matias and Combe Gaël. "Soil-pile interaction during pile installation. Observations from x-ray tomography and 3D-DIC." In Advances in Soil Mechanics and Geotechnical Engineering. IOS Press, 2015. https://doi.org/10.3233/978-1-61499-601-9-600.
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The mechanisms behind the installation of a driven pile in sands are complex and difficult to identify from field tests. Phenomenon such as grain breakage, local variations in sand density, pile abrasion and arching effects, are commonly studied through indirect methods or by using small laboratory models. This article presents the results of an experimental laboratory research devoted to the analysis of the soil kinematics during the installation of an uninstrumented close-ended model pile in a specimen of siliceous sand. The research has focused on understanding the micromechanical aspects of the installation process by focusing on sand-pile interaction around the pile's tip. A three dimensional displacement field was obtained with the combined use of x-ray tomography and three dimensional digital image correlations. The results show two well-identified zones where the displacement and therefore strains concentrate. The interaction of these zones, which are linked by consecutive phases of sand contraction and extension as the pile embeds into the sand, gives new ideas about the mechanisms controlling the pile shaft friction.
Conference papers on the topic "Three-dimensional Digital Image Correlation (DIC)"
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Clark, Brandi N., J. David McColskey, Ross Rentz, and Jeffrey W. Sowards. "Using Digital Image Correlation to Improve Stress-Corrosion Cracking Evaluation by NACE TM0177-B*." In CORROSION 2017. NACE International, 2017. https://doi.org/10.5006/c2017-08992.
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Abstract NACE TM0177 Method B is a standard method for evaluating stress-corrosion cracking (SCC) resistance. To conduct the test, a beam of material is loaded into a three-point bend fixture and exposed to the specified test solution, then inspected for cracking (failure) at predetermined time intervals. The three-point bending equation is used to calculate peak stress in the center of the beam; however, the bend equation is only valid for elastic deformation. In actuality, the specimens have a pair of holes drilled at the centerline to act as stress concentrators, resulting in stresses that are both elastic and plastic as well as a non-uniform stress distribution near the holes. As a result, the reported critical stress (SC) obtained from Method B is a “pseudo-stress” rather than a true stress. In this study, Digital Image Correlation (DIC) was used to determine the actual strain distributions over the surface of the bend samples made from a representative mix of both corrosion-resistant alloys (Type 316, 2205, 420, and 440 stainless steels) and pipeline steels (API 5L X65 and X80) and compare the measured peak stress to the pseudo-stress calculated using Method B. The measured average stress concentration factor due to the holes was 1.74 ± 0.20, which was in very good agreement with theoretical predictions. To increase the accuracy of Method B, future revisions to the standard should consider modifying the calculation of pseudo-stress to account for this stress concentration factor.
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Shan, Mingguang, Bei Hu, Zhi Zhong, Lei Liu, Yongqiang Xie, and Zhongbo Li. "Global estimation of underwater polarization imaging using image correlation." In Digital Holography and Three-Dimensional Imaging. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/dh.2024.w4a.32.
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A method for global estimation of underwater polarization imaging using image correlation is proposed and some experiments are carried out to verify the feasibility and effectiveness of this approach.
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Yamamoto, Yujin, Koji Kinomura, Satoshi Murata, Hisafumi Asaue, and Tomoki Shiotani. "Seismic performance of RC column surrounded by 3D printed concrete permanent formwork with short fiber." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.2770.
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<p>In this study, two 3DCP‐RC(three‐dimensional concrete printing‐reinforced concrete) composite columns were fabricated surrounded by the outer shells containing short fibers with 1% or 2% volume per 3D printed mortar and compared to the seismic performance with a conventional RC column through quasi‐static cyclic loading tests. As a result, it was confirmed that the maximum horizontal strength and the ductility during the ultimate state on both 3DCP‐RC columns were enhanced in comparison with that of conventional RC. The maximum principal strain distribution measured by digital image correlation method revealed that crack distribution was slightly different among the 3DCP‐RC columns and the conventional one. And the short fiber volume contained in the outer shell mortar had an only slight impact on seismic performance and it can be attributed to its printing path.</p>
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BUKENYA, KALIMA, ALESSANDRO SABATO, and MARIANNA MAIARÙ. "CURE SHRINKAGE CHARACTERIZATION OF A THERMOSETTING RESIN WITH THREE-DIMENSIONAL DIGITAL IMAGE CORRELATION (3D-DIC)." In Proceedings for the American Society for Composites-Thirty Eighth Technical Conference. Destech Publications, Inc., 2023. http://dx.doi.org/10.12783/asc38/36656.
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This work presents the application of three-dimensional digital image correlation (3D-DIC) to capture pre- and post-gelation volumetric chemical shrinkage of EPON 862 thermosetting resin paired with hardener triethylenetetramine (TETA) and cured at room temperature. The manufacturer-recommended 100:14 resin-hardener mixing ratio is used for DIC experimentation. A stress-free boundary condition is employed with a thin Teflon sheet placed between the resin mixture and the specimen container. For the first time, a spray-painted speckle pattern is applied directly to the resin to record full-field strain measurements during curing. This speckle pattern is employed immediately after the resin mixture is poured on the Teflon-covered specimen container for the pre-gelation case, and after gelation has been visibly observed for the post-gelation case. Strain capture with 3D-DIC is initiated directly after speckle pattern application with stereo-images captured every 30 seconds for one hour and then every 60 seconds for two hours. Differential scanning calorimetry (DSC) is used to determine resin cure kinetics to correlate chemical shrinkage with degree of cure. The presented technique provides an innovative methodology to characterize the chemical shrinkage of thermosets during curing.
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Guo, Bicheng, Xiaowan Zheng, Siyuan Fang, and Lianxiang Yang. "Suction Cup Quality Predication by Digital Image Correlation." In WCX SAE World Congress Experience. SAE International, 2023. http://dx.doi.org/10.4271/2023-01-0067.
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<div class="section abstract"><div class="htmlview paragraph">Vacuum suction cups are used as transforming handles in stamping lines, which are essential in developing automation and mechanization. However, the vacuum suction cup will crack due to fatigue or long-term operation or installation angle, which directly affects production productivity and safety. The better design will help increase the cups' service life. If the location of stress concentration can be predicted, this can prevent the occurrence of cracks in advance and effectively increase the service life. However, the traditional strain measurement technology cannot meet the requirements of tracking large-field stains and precise point tracking simultaneously in the same area, especially for stacking or narrow parts of the suction cups. The application must allow multiple measurements of hidden component strain information in different fields of view, which would add cost. In this study, a unique multi-camera three-dimensional digital image correlation (3D-DIC) system was designed and applied to measure the strain concentration of the suction cups while the cups were running the pulling progress. In this technique, a multiplexed quad-cameras DIC system which contains two sets of 3D-DIC system (4 cameras) with different field of view or different measurement directions enables simultaneous measurement of full-filed and hidden parts under the same calibration progress. The first two cameras built a sub-group of the 3D-DIC system, which was used to measure the local strain of the narrow or stacked prats. The other system was used to acquire the strain fields of the entire suction cup. In addition to the experimental test, the fatigue test to see the cracks appeared location. The results of DIC were compared to the fatigue data, and the DIC experimental data validated the crack location. This project aims to help designers and operators thoroughly understand the performance of vacuum cups by investigating the strain concentration and crack location.</div></div>
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Montgomery, Veronica, Oscar Martinez, Paul Nogradi, Lance Lowe, and Abiodun Adeniyi. "Free Drop Impact Data Acquisition Using Digital Image Correlation." In ASME 2023 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/pvp2023-106649.
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Abstract Radioactive materials are widespread throughout our everyday activities and are used in many different types of industries. There are about 3 million shipments of radioactive materials that occur each year in the United States. Because radioactive materials are so widespread, safety and security are top priorities for the Package Testing Program (PTP) at Oak Ridge National Laboratory (ORNL), and effective and accurate data collection methods are imperative. The packaging used to carry nuclear materials is subjected to rigorous tests to verify its durability. One such test is the free-drop test. Impact data are often collected through an accelerometer attached to the test unit. Unfortunately, these devices are easily broken in the testing environment and are expensive to procure, install, and post process. Digital image correlation (DIC) using high-speed images offers a non-contact alternative. DIC is an optical method that employs image registration techniques to accurately measure changes in images. To verify the suitability of the cameras and process, a test weight was dropped from various heights, and the impact acceleration was derived using DIC. This paper compares the results with data from the attached accelerometer. A total of nine drop tests were performed with three different image capture rates (frames per second) and from three different package drop heights. An ANSYS LS-Dyna model was also used to determine theoretically predicted deceleration rates for comparison with the DIC and accelerometer data.
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Jee, Calvin, Gabriel Salata, David Nobes, and Kajsa Duke. "Investigating The Effect Of A Speckle Pattern On Measurement Uncertainty In A Three-Dimensional Digital Image Correlation (3D-Dic) System." In 2018 Canadian Society for Mechanical Engineering (CSME) International Congress. York University Libraries, 2018. http://dx.doi.org/10.25071/10315/35392.
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Bartelmo, Sally, Sreehari Rajan, Ning Li, Michael Sutton, and Dimitrios C. Rizos. "Digital Image Correlation Techniques for Prestressed Concrete Tie Quality Control." In 2016 Joint Rail Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/jrc2016-5842.
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Qualification of prestressed concrete railroad ties is currently performed through testing at the design level following established AREMA guidelines, while important parameters, such as the strand transfer length, are typically not identified. Conventional testing practices are time demanding, expensive and labor intensive. Consequently, implementation of highly reliable, yet cost effective, quality control procedures at the tie production stage is highly appropriate and desired. In this work, the authors developed a stereo-vision system for both laboratory and industrial environments to measure the 3-D strain fields on the surfaces of prestressed concrete railroad ties. The proposed measurement system is based on the Digital Image Correlation (DIC) techniques developed in University of South Carolina (USC) laboratories over the past three decades. It is a non-destructive, non-contacting technique that has been successfully applied to obtain full-field measurements for a wide range of materials, loading types and temperature conditions. Known as 3D-DIC or Stereo-DIC, the method employs a stereo-vision system to successfully perform quality assessment of concrete ties in relation to the determination of: (i) the transfer length in both laboratory and production facility environments and (ii) full strain fields during product qualification tests to identify product defects. The proposed procedure is introduced and verified through application in a laboratory environment. The implementation of the method is presented and the cost effectiveness, accuracy, and versatility are discussed.
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Kumar, David, Sneha Prasad, and Chih-Hung Chiang. "An improved AI based semantic filtering for marker less DIC." In ASNT Research Symposium 2023. The American Society for Nondestructive Testing Inc., 2023. http://dx.doi.org/10.32548/rs.2023.004.
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Large structures, like wind turbines, are susceptible to structural damage from environmental variables and changing operational loads, which makes their parts susceptible to mechanical and performance deterioration. The use of high-definition optical vision sensors in digital image correlation (DIC) allows for the application of a non-destructive image registration technique that measures three-dimensional deformations on surfaces through correlations of a unique pattern or a set of unique localized patterns. However, it takes time and is quite challenging to put an artificial marker on the surface of a large structure, such as a distinctive speckled pattern. Therefore, to facilitate accurate displacement measurements for vibrational study and structural health monitoring, this study proposes an AI-based approach that searches and segments clusters of interest points from a reference image which works as a unique marker for DIC. Our algorithm is tested on a utility-scale wind turbine which demonstrates its effectiveness for structural health monitoring of large structures without artificial markers
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LISIECKA-GRACA, P. "Deformation analysis of ZnMgAl coated steel sheet using digital image correlation (DIC) system." In Material Forming. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902479-89.
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Abstract. Protective metallic coatings may be applied to the finished tubes and pipes using the hot dip method or may be applied to cold rolled sheet that is then used in the roll forming process of tubes manufacturing. In the latter case applied coating must ensure the proper adhesion and lack of cracks during deformation. In this work, the main objective is to assess the plastic deformability of steel sheets covered with an advanced ZnMgAl coating. The assessment of the susceptibility of the ZnMgAl coatings to plastic deformation was carried out using three-point bending tests, supported by the digital image correlation technique. A standard bending test of a steel sheet with a ZnMgAl coating at different bending angles was also used. The comparison of the results of the tests carried out allowed for the formulation of conclusions for direct use in industrial practice.
Reports on the topic "Three-dimensional Digital Image Correlation (DIC)"
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Weeks, Timothy "Dash." DTPH56-13-X-000013 Modern High-Toughness Steels for Fracture Propagation and Arrest Assessment-Phase II. Pipeline Research Council International, Inc. (PRCI), 2018. http://dx.doi.org/10.55274/r0012037.
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NIST work developed processes to identify the stress/strain/crack velocity conditions for unstable high-rate ductile crack propagation found in a full-scale pipeline burst test and duplicate those conditions in a medium-scale test. With modeling to validate conditions and assumptions used in reducing the scale of the tests. A medium-scale test to elucidate material property data necessary to qualify high-strength high-toughness steels based on the correlation to large-scale tests. Parametric determination of the material properties governing fracture propagation or arrest-ability was developed. This will assist researchers to determine a relevant and effective small-scale test (or tests) that provides enough information for material selection, design, reliability, as well as integrity and risk assessment. Pipe evaluated includes API5L X70 and X80 pipe. The strain was measured by a three-dimensional digital image correlation system. This project takes a phased approach with complementary research in successive phases beginning with a road map to systematically fill gaps in knowledge and understanding of the problem of unstable high-rate ductile running failures in pipelines. This report is structured to highlight the problem statement with respect to the current state of the art understanding, define knowledge gaps and present the plan, and progress toward meeting the objective. The following sections specifically cover the effort to develop and inform a constitutive material model necessary for the structural model of the medium-scale test. The material testing required to inform the constitutive material model is presented. Conclusions of this phase of the project are also presented in addition to the proposed work in Phase III of the project.