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Rozprawy doktorskie na temat „Artificial crack”

Autor: Grafiati

Data publikacji: 2 listopada 2024

Data aktualizacji: 31 lipca 2025

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1

Rehman, Atiq-Ur. "An investigation of methods of reducing fatigue crack growth by artificial crack-closure effects." Thesis, University of Salford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315379.

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Yang, Jidong. "Road crack condition performance modeling using recurrent Markov chains and artificial neural networks." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000567.

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Bezerra, Agnes. "The Use of Artificial Intelligence for Assessing Damage in Concrete Affected by Alkali-Silica Reaction (ASR)." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42730.

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Over the last decades, numerous techniques have been proposed worldwide to assess the actual damage of critical concrete infrastructure. A method that has progressively been used in North America is a novel microscopic tool, the Damage Rating Index (DRI). This semi-quantitative petrographic tool was developed to reliably appraise both the nature and degree of damage in concrete affected by alkali-silica reaction (ASR), which may threaten the serviceability and the durability of concrete infrastructure around the world. Performing the DRI consists of counting numerous distress features (i.e. cl

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田中, 啓介, Keisuke TANAKA, 義明秋庭 та ін. "防振ゴム材料における疲労き裂進展挙動へのJ 積分の適用". 日本機械学会, 2003. http://hdl.handle.net/2237/9154.

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Furfari, Domenico. "Short track growth from artificial defects in Ti-10V-2Fe-3Al : a study using optical techniques for crack measurements and detection." Thesis, Cranfield University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427204.

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Hou, Chuanchuan. "Vibration-based damage identification with enhanced frequency dataset and a cracked beam element model." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/20434.

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Damage identification is an important topic in structural assessment and structural health monitoring (SHM). Vibration-based identification techniques use modal data to identify the existence, location and severity of possible damages in structures, often via a numerical model updating procedure. Among other factors influencing the practicality and reliability of a damage identification approach, two are of primary interest to this study. The first one concerns the amount and quality of modal data that can be used as ‘response’ data for the model updating. It is generally recognised that natur

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Ingabire, Annick, and Robin Olsson. "Standardization of Eddy Current Testing Calibration for Valve Spring Wire." Thesis, KTH, Industriell produktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-232712.

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Elektromagnetisk provning (ECT) har blivit en av de mest använda metoderna för attkvalitetssäkra produkter där icke-destruktiv testning av material krävs. Vid provning av ståltrådinteragerar utrustningen med det testade materialet och upptäcker ytdefekter och, i vissomfattning, om strukturen skiljer sig från det kalibrerade provet. Om produkten befinner sigutanför specifikationen, skrotas den eller ombearbetas. Denna Mastersuppsats undersökerkalibreringsförfarandet för elektromagnetisk provning som utförs av Suzuki Garphyttan, som är enav de största tillverkarna i världen av ventil- och transm

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Nguyen, Thi Thu Trang. "Influence de l'effet de l'interface acier/béton (top-bar effect) sur la corrosion de structures en béton armé exposées en environnement de chlorures ou de carbonatation." Electronic Thesis or Diss., Université de Toulouse (2023-....), 2024. http://www.theses.fr/2024TLSEI009.

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Le béton armé est connu l’un des matériaux les plus utilisés dans la construction. Néanmoins, après une période de mise en exploitation, il peut se corroder. Les chlorures et la carbonatation sont les principaux facteurs provoquant la corrosion des structures en béton armé. La thèse a pour objectif d’étudier le comportement à la corrosion du béton armé sous l’environnement de carbonatation ou des chlorures, correspondant à l'influence de l’effet de la qualité de l’interface acier/mortier (top-bar effet), du type de ciment ainsi que de la fissure transversale artificielle ou des fissures transv

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9

Mirjana, Filipovic. "Evolution of artificial defects during shape rolling." Licentiate thesis, Högskolan Dalarna, Materialvetenskap, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:du-5215.

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Very often defects are present in rolled products. For wire rods, defects are very deleterious since the wire rods are generally used directly in various applications. For this reason, the market nowadays requires wire rods to be completely defect-free. Any wire with defects must be rejected as scrap which is very costly for the production mill. Thus, it is very important to study the formation and evolution of defects during wire rod rolling in order to better understand and minimize the problem, at the same time improving quality of the wire rods and reducing production costs. The present wo

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Datsiou, Kyriaki Corinna. "Design and performance of cold bent glass." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/269408.

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The demand for flat glass is high and increasing significantly in the building industry as a direct result of architectural requirements for lightness, transparency and natural light. Current architectural trends require glass in curvilinear forms for smooth free-form façades. Two principal challenges arise from this: to cost-effectively produce the desired curvature and; to ensure its safe performance after exposure to ageing. The recent availability of high strength glass provides an opportunity to address the first challenge by developing cold bent glass. Cold bending involves the strainin

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Filipovic, Mirjana. "Evolution of artificial defects during shape rolling." Licentiate thesis, Stockholm : Division of Mechanical Metallurgy, Department of Material Science and Engineering, Industrial Engineering and Management, Royal Institute of Technology, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4350.

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12

Lipowczan, Martin. "Inverzní analýza spolehlivosti předpjatého mostu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372071.

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The proposed diploma thesis deals with the application of methodology and tools of inverse analysis for design of selected structural parameters using a fully probabilistic analysis to determine the level of its reliability. The method based on artificial neural networks is used to approximate the inverse function. The inverse analysis was carried out in two ways that differs in the method of obtaining reliability indicators. The structure analyzed in this work was an existing bridge. The year of construction is estimated approximately between the years 1955 to 1960. The bridge is located clos

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13

Sjösten, William, and Victor Vadling. "Finite Element Approximations of 2D Incompressible Navier-Stokes Equations Using Residual Viscosity." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-354590.

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Chorin’s method, Incremental Pressure Correction Scheme (IPCS) and Crank-Nicolson’s method (CN) are three numerical methods that were investigated in this study. These methods were here used for solving the incompressible Navier-Stokes equations, which describe the motion of an incompressible fluid, in three different benchmark problems. The methods were stabilized using residual based artificial viscosity, which was introduced to avoid instability. The methods were compared in terms of accuracy and computational time. Furthermore, a theoretical study of adaptivity was made, based on an a post

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14

Ren-Zhi, Li, and 李仁志. "An Investigation of Artificial Infiltration Induced Fatigue Crack Growth Retardation." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/57975191192130123181.

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博士<br>國立臺灣大學<br>機械工程學研究所<br>87<br>It is well known that fatigue fracture accounts for a great number of machanical failures. When a fatigue crack is discovered in a critical component during routine maintenance, replacement of component may not be feasible as there may not be stocks or the available down-time is too limited. Some expeditious provisory fixing may then be needed to allow the component to operate safely until more elaborate repair or replacement can be arranged. Research in fatigue has largely been concentrated on understanding the mechanisms and predicting the progress of failu

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Chen, Yao-Rong, and 陳耀榮. "Using DEM to Analyze Crack Extension and Mechanical Behavior of Artificial Rock." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/63971134342432844198.

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碩士<br>國立臺灣大學<br>土木工程學研究所<br>99<br>Since World War II, the development of fracture mechanics is becoming complete. In the rock engineering field, fracture plays an important role on rock strength, so crack propagation is a big issue for studying fracture behavior of material. When the rock material damage is caused not by material strength but stress concentration of the pre-exist cracks, it becomes different from intact rock on failure strength and failure behavior, so rock mechanics can not help us do the analysis, design on engineering. On the side of geology, due to the strong orogeny, the

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16

Chuang, Chung-ju, and 莊忠儒. "Application ultrasonic A-Scan and Phased-array technology to measure reliability of the natural and artificial crack of material." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/63318147720195652539.

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碩士<br>國立雲林科技大學<br>環境與安全工程系碩士班<br>93<br>The crack has the most influence on strength of structure, therefore it need to understand the crack position and size accurately, and then prevent the great accident from happening, at last this study will research on the crack testing methods of the industry. According to ultrasonic wave has extremely good measuring ability to the metal material crack and defect of welding. And the ultrasonic wave utilized to measure metal material weld and tired caused flaw, for example crack, integration partial, seam, etc. But most judgments of the detection methods

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Wei-MingTseng and 曾韋鳴. "A Study of Crack Identification of A Beam and Plate by Artificial Neural Network Method and Discrete Wavelet Transform." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/88106574207567822052.

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碩士<br>國立成功大學<br>系統及船舶機電工程學系碩博士班<br>98<br>Neural networks have been widely used in various fields, such as diagnosis and monitoring of industrial engineering system, digital image processing and analysis, speech recognition, sonar and seismic signal classification, and financial management. The method can process complex information and establish the mapping relationship between input and output by learning and revision. Finally, an identification system is acquired. The aim of this study is to find the depth of the damage of an aluminum bar and to detect the approximate length of the crack

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Hsieh, Cheng-Ying, and 謝承穎. "Integration of image processing, computer vision, and artificial intelligence to identify concrete surface cracks." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/f53e74.

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碩士<br>國立臺灣大學<br>土木工程學研究所<br>107<br>Structural health monitoring becomes more and more important in practice because this technology can elongate the structural life cycle as well as protect structures against natural hazards. Moreover, structural health monitoring systems can automatically inform residents and users for the current condition of structures and engineers for the current performance. In past, structural health monitoring relies on the contact sensors to acquire structural responses and then diagnoses structures in accordance with the measurements. In this research, a new method i

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19

Yi-HaoYen and 顏奕豪. "Damage Detection of a Plate with Multiple Cracks by two-Dimensional Discrete Wavelet Transforms and Artificial Neural Network." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/31882378961747647614.

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碩士<br>國立成功大學<br>系統及船舶機電工程學系碩博士班<br>101<br>Structural damage has been a very important issue in engineering. If damage can be detected in a timely manner, many disasters can be prevented. In recent years, wavelet transform methods have been widely used in various domains, such as image compression, noise removal, edge detection, communication, etc.This study will use the two-dimensional discrete wavelet transform method to detect the position of cracks in plate. Running data through the artificial neural network allows for large computations to be calculated at rapid speeds, and relationships b

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Zhi-ShiangLu and 盧智祥. "Damage Detection in Stiffened Plates with Multiple Cracks by Artificial Neural Network Method and Two-Dimensional Discrete Wavelet Transform." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/50420876316219653586.

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碩士<br>國立成功大學<br>系統及船舶機電工程學系碩博士班<br>99<br>During recent decades, there has been an increase in the number of researchers who have devoted themselves to artificial neural networks. This method has many useful characteristics that appeal to such researchers, including adaptation learning capability, fault-tolerant capability, and the ability to use practice examples to build a neural networks system. The method can process complex information and establish the correspondence between input and output relationships by learning and revision. Therefore, the neural networks have been widely used in va

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Biolatto, Guillermo Adriel, Héctor Jorge Ezequiel Fraire, and Mariano Nicolás Novella. "El manejo reproductivo posparto en tambos de la zona de James Craik." Bachelor's thesis, 2014. http://hdl.handle.net/11086/4693.

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Trabajo final integrador. (Área de Consolidación Sistemas de Producción Pecuarios) -- UNC- Facultad de Ciencias Agropecuarias, 2014<br>El siguiente trabajo se centrará en la evaluación del manejo reproductivo postparto de la vaca lechera. El trabajo se hará sobre 4 tambos de la zona de James Craik que forman parte de un grupo: Tambo Biolatto, Tambo Pedernera, Tambo Peréz y Tambo Pineda. El objetivo del trabajo es conocer los distintos manejos reproductivos que lleva adelante cada tambo, comparar los resultados que se obtienen a través de estos distintos manejos, buscar las causas de los pr

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Naddaf, Hamid Eskandari. "Fracture Characteristics Of Self Consolidating Concrete." Thesis, 2008. https://etd.iisc.ac.in/handle/2005/761.

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Self-consolidating concrete (SCC) has wide use for placement in congested reinforced concrete structures in recent years. SCC represents one of the most outstanding advances in concrete technology during the last two decades. In the current work a great deal of cognizance pertaining to mechanical properties of SCC and comparison of fracture characteristics of notched and unnotched beams of plain concrete as well as using acoustic emission to understand the localization of crack patterns at different stages has been done. An artificial neural network (ANN) is proposed to predict the 28day com

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Naddaf, Hamid Eskandari. "Fracture Characteristics Of Self Consolidating Concrete." Thesis, 2008. http://hdl.handle.net/2005/761.

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Self-consolidating concrete (SCC) has wide use for placement in congested reinforced concrete structures in recent years. SCC represents one of the most outstanding advances in concrete technology during the last two decades. In the current work a great deal of cognizance pertaining to mechanical properties of SCC and comparison of fracture characteristics of notched and unnotched beams of plain concrete as well as using acoustic emission to understand the localization of crack patterns at different stages has been done. An artificial neural network (ANN) is proposed to predict the 28day comp

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