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Dissertations / Theses on the topic 'Damage Detection'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Cockerill, Aaron. "Damage detection of rotating machinery." Thesis, Cardiff University, 2017. http://orca.cf.ac.uk/105671/.

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Acoustic emission (AE) is an emerging technique for the condition monitoring of rotating machinery components, including both rolling element bearings and gears. Due to the high frequency range over which AE is sensitive to, AE potentially offers advantages for detection of incipient damage at an early stage of failure when compared to traditional techniques such as vibration. This thesis first investigates the effects of increased speed and load on the generation of AE within cylindrical roller bearings, and determines similarities and differences between AE and vibrational data. A traditiona

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2

Dissanayake, Amal S. "Electrostatic discharge damage detection method." Thesis, Kansas State University, 1997. http://hdl.handle.net/2097/13512.

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3

Al, Jailawi Samer Saadi Hussein. "Damage detection using angular velocity." Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6539.

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The present work introduces novel methodologies for damage detection and health monitoring of structural and mechanical systems. The new approach uses the angular velocity inside different mathematical forms, via a gyroscope, to detect, locate, and relatively quantify damage. This new approach has been shown to outperform the current state-of-the-art acceleration-based approach in detecting damage on structures. Additionally, the current approach has been shown to be less sensitive to environmental acoustic noises, which present major challenges to the acceleration-based approaches. Furthermor

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4

Gharibnezhad, Fahit. "Robust damage detection in smart structures." Doctoral thesis, Universitat Politècnica de Catalunya, 2014. http://hdl.handle.net/10803/277544.

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This thesis is devoted to present some novel techniques in Structural Health Monitoring (SHM). SHM is a developing field that tries to monitor structures to make sure that they remain in their desired condition to avoid any catastrophe. SHM includes different levels from damage detection area to prognosis field. This work is dedicated to the first level, which might be considered the main and most important level. New techniques presented in this work are based on different statistical and signal processing methods such as Principal Component Analysis and its robust counterpart, Wavelet Transf

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5

Matlack, Kathryn H. "Nonlinear ultrasound for radiation damage detection." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51965.

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Radiation damage occurs in reactor pressure vessel (RPV) steel, causing microstructural changes such as point defect clusters, interstitial loops, vacancy-solute clusters, and precipitates, that cause material embrittlement. Radiation damage is a crucial concern in the nuclear industry since many nuclear plants throughout the US are entering the first period of life extension and older plants are currently undergoing assessment of technical basis to operate beyond 60 years. The result of extended operation is that the RPV and other components will be exposed to higher levels of neutron radiat

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6

Huethwohl, Philipp Karl. "Bridge damage detection and BIM mapping." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/285562.

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Bridges are a vitally important part of modern infrastructure. Their condition needs to be monitored on a continuous basis in order to ensure their safety and functionality. Teams of engineers visually inspect more than half a million bridges per year in the US and the EU. There is clear evidence to suggest that they are not able to meet all bridge inspection guideline requirements. In addition, the format and storage of inspection reports varies considerably across authorities because of the lack of standardisation. The availability of a comprehensive and open digital representation of the da

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7

Malik, Shoaib Ahmad. "Damage detection using self-sensing composites." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/1750/.

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The primary aim of this research programme was to enable damage detection in glass fibre reinforced composites using the reinforcing fibres as the sensing element. In other words, E-glass fibres were used as light guides to detect the fracture of individual fibres, when loaded in tension. This was achieved by monitoring the transmitted light intensity through the reinforcing glass fibres. Two types of glass fibres and matrices were evaluated. In the case of glass fibres, E-glass and custom-made small-diameter (12 µm) optical fibre (SDOF) were used. Three types of low refractive index resin sys

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8

Tadros, Nader Nabil Aziz. "Structural damage detection using ambient vibrations." Thesis, Kansas State University, 2014. http://hdl.handle.net/2097/18178.

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Master of Science<br>Department of Civil Engineering<br>Hani G. Melhem<br>The objective of this research is to use structure ambient random vibration response to detect damage level and location. The use of ambient vibration is advantageous because excitation is caused by service conditions such as normal vehicle traffic on a highway bridge, train passage on a railroad bridge, or wind loads on a tall building. This eliminates the need to apply a special impact or dynamic load, or interrupt traffic on a bridge in regular service. This research developed an approach in which free vibration of a

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9

Asnaashari, Erfan. "Vibration-based damage detection in structures." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/vibrationbased-damage-detection-in-structures(09061582-55fb-4fba-846e-2156dd4ef172).html.

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Structural health monitoring systems have a great potential for cost saving and safety improvement in different types of structures. One of the most important tasks of these systems is to identify damage at an early stage of its development. A variety of methods may be used to identify, locate, or quantify the extent of damage or fault in a structural or mechanical component. However, the preferable method is the one which maximises the probability of detecting the flaw, while also considering feasibility of in-situ testing, ease of use and economic factors. Cracks are one of the common defect

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10

Dixit, Akash. "Damage modeling and damage detection for structures using a perturbation method." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43575.

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This thesis is about using structural-dynamics based methods to address the existing challenges in the field of Structural Health Monitoring (SHM). Particularly, new structural-dynamics based methods are presented, to model areas of damage, to do damage diagnosis and to estimate and predict the sensitivity of structural vibration properties like natural frequencies to the presence of damage. Towards these objectives, a general analytical procedure, which yields nth-order expressions governing mode shapes and natural frequencies and for damaged elastic structures such as rods, beams, plates an

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11

Preisler, Andreas [Verfasser]. "Efficient Damage Detection and Assessment Based on Structural Damage Indicators / Andreas Preisler." Düren : Shaker, 2020. http://d-nb.info/1205239669/34.

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12

Bearzotti, Riccardo. "Structural damage detection using deep learning networks." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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Research on damage detection of structures using image process- ing techniques has been actively conducted, specially on infrastruc- tures as road pavements, achieving considerably high detection accu- racies. These techniques are more and more studied all over the world cause seems be a powerful method able to replace, in some conditions, the experience and the visual ability of humans. This thesis has the purpose to introduce how the development in the last few years of the image processing can be useful to avoid some costs on structure monitoring and predict some disaster, that the most o

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13

Dincal, Selcuk. "Structural damage detection using frequency response functions." Thesis, Texas A&M University, 2005. http://hdl.handle.net/1969.1/3129.

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This research investigates the performance of an existing structural damage detection method (SDIM) when only experimentally-obtained measurement information can be used to calculate the frequency response functions used to detect damage. The development of a SDIM that can accurately identify damage while processing measurements containing realistic noise levels and overcoming experimental modeling errors would provide a robust method for identifying damage in the larger, more complex structures found in practice. The existing SDIM program, GaDamDet, uses an advanced genetic algorithm, along w

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14

Aydogan, Mustafa Ozgur. "Damage Detection In Structures Using Vibration Measurements." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1058809/index.pdf.

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Cracks often exist in structural members that are exposed to repeated loading, which will certainly lower the structural integrity. A crack on a structural member introduces a local flexibility which is a function of the crack depth and location. This may cause nonlinear dynamic response of the structure. In this thesis, a new method is suggested to detect and locate a crack in a structural component. The method is based on the fact that nonlinear response of a structure with a crack will be a function of the crack location and crack magnitude. The method suggested is the extension of a recent

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15

Yanilmaz, Huseyin. "Damage Detection In Beams By Wavelet Analysis." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12609162/index.pdf.

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In this thesis, a method proposed by Han et al. [40] for detecting and locating damage in a structural member was adapted. The method was based on the energies that were calculated from the CWT coefficients of vibrational response of a cantilever beam. A transverse cut at varying depths was introduced. The presence and location of crack was investigated by processing experimentally acquired acceleration signals. Results of modal analysis and wavelet analysis of the beam with different cut depths were compared. In addition, effect of using different mother wavelets in CWT analysis for damage de

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16

Mustapha, Faizal. "Damage detection and localisation using novelty indices." Thesis, University of Sheffield, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434514.

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17

Mejia, Paloma Yasmin. "Smart Systems for Damage Detection and Prognosis." Miami University Honors Theses / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=muhonors1114101552.

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18

Gerbo, Evan Jamison. "Structural Damage Detection Utilizing Experimental Mode Shapes." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1247.

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A method of locating structural damage is developed and tested to aid in the evaluation of structural health. This method will help minimize the cost of structural inspection and repair by informing engineers of where damage, due a seismic event, has occurred before the removal of finishes for visual inspection. This thesis begins to answer the question “can structural damage be detected solely through analysis of experimentally measured mode shapes?” The work encompasses construction of a test structure, with three braces that can be repeatedly engaged or dis-engaged, thus allowing for testin

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19

Villani, Luis Gustavo Giacon. "Robust damage detection in uncertain nonlinear systems /." Ilha Solteira, 2019. http://hdl.handle.net/11449/191200.

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Orientador: Samuel da Silva<br>Abstract: Structural Health Monitoring (SHM) methodologies aim to develop techniques able to detect, localize, quantify and predict the progress of damages in civil, aerospatial and mechanical structures. In the hierarchical process, the damage detection is the first and most important step. Despite the existence of numerous methods of damage detection based on vibration signals, two main problems can complicate the application of classical approaches: the nonlinear phenomena and the uncertainties. This thesis demonstrates the importance of the use of a stochasti

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20

Kim, Daewon. "Phased Array Damage Detection and Damage Classification in Guided Wave Structural Health Monitoring." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/77073.

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Although nondestructive evaluation techniques have been implemented in many industry fields and proved to be useful, they are generally expensive, time consuming, and the results may not always be reliable. To overcome these drawbacks, structural health monitoring (SHM) systems has received significant attention in the past two decades. As structural systems are becoming more complicated and new materials are being developed, new methodologies, theories, and approaches in SHM have been developed for damage detection, diagnosis, and prognosis. Among the methods developed, the guided Lamb wave b

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21

Campbell, Marvin G. "Structural damage detection using frequency domain error localization." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA289932.

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22

Rule, Ruth Anne. "Vibration-based damage detection in ceramics and glass." Thesis, Loughborough University, 2000. https://dspace.lboro.ac.uk/2134/27153.

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This thesis describes the development of the hardware, experimental procedures and algorithms required for vibration based damage identification in small ceramic and glass structures. The results form the basis of a fully automated industrial quality assurance system.

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23

Lucas, Lynda T. "Detection of DNA damage caused by N-nitrosoindoles." Thesis, University of Leicester, 2001. http://hdl.handle.net/2381/30755.

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To evaluate the genotoxicity of N-nitrosoindoles, three model compounds, 1-nitrosoindole-3-acetonitrile (NIAN), 1-nitrosoindole-3-acetamide and l-nitrosoindole-3-acetic acid methyl ester, were reacted with isolated purine nucleotides at physiological pH. The profile of reaction products was identical for each of the N-nitrosoindoles. The results indicated that N-nitrosoindoles can efficiently transfer the nitroso group to nucleophilic targets in isolated purine nucleotides, causing depurination, deamination coupled with depurination to afford hypoxanthine and xanthine, and formation of a novel

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24

Kannappan, Laxmikant Aerospace Civil &amp Mechanical Engineering Australian Defence Force Academy UNSW. "Damage detection in structures using natural frequency measurements." Awarded by:University of New South Wales - Australian Defence Force Academy. Aerospace, Civil & Mechanical Engineering, 2009. http://handle.unsw.edu.au/1959.4/44852.

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In the last two decades, the emphasis in aircraft maintenance has been on developing online structural health monitoring systems to replace conventional non destructive inspection techniques which require considerable down-time, human effort and cost. Vibration based damage detection is one of the most promising techniques for implementation in Structural Health Monitoring (SHM). In vibration based methods, the presence of damage is detected by monitoring changes in one of the dynamic parameters of the structure, resonant frequencies, modeshapes or damping characteristics. Compared to modes

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25

Amraoui, Mohamed Yacine. "Non-invasive damage detection and structural health monitoring." Thesis, University of Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271865.

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26

Davis, Ivan Christopher. "Damage Detection in Aluminum Cylinders Using Modal Analysis." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/34317.

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Many studies have attempted to detect structural damage by examining differences in the frequency response functions of a structure before and after damage. In an experimental setting, this variation can not be attributed solely to the addition of damage. Other sources of variation include testing and structure variation. Examples of testing variation include the error introduced by modal parameter extraction, measurement noise, and the mass loading of the accelerometer. Structure variability is due to slight differences in the supposedly identical structures. Dimensional tolerancing is o

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27

Lu, Kan. "Dynamics Based Damage Detection of Plate-Type Structures." University of Akron / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=akron1133818717.

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28

Liu, Ning. "Composite materials impact damage detection using neural networks." Thesis, Aston University, 2002. http://publications.aston.ac.uk/11838/.

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This thesis considers two basic aspects of impact damage in composite materials, namely damage severity discrimination and impact damage location by using Acoustic Emissions (AE) and Artificial Neural Networks (ANNs). The experimental work embodies a study of such factors as the application of AE as Non-destructive Damage Testing (NDT), and the evaluation of ANNs modelling. ANNs, however, played an important role in modelling implementation. In the first aspect of the study, different impact energies were used to produce different level of damage in two composite materials (T300/914 and T800/5

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29

Murugesan, Kaviraj. "Damage detection on railway bridges using system identification." Thesis, Karlstads universitet, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-28595.

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30

Qiao, Long. "Structural damage detection using signal-based pattern recognition." Diss., Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1385.

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31

Lertpaitoonpan, Wirat. "Bridge damage detection using a system identification method." [Florida] : State University System of Florida, 2000. http://etd.fcla.edu/etd/uf/2000/amt2446/WiratDissertation3-10-00.pdf.

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Thesis (Ph. D.)--University of Florida, 2000.<br>Title from first page of PDF file. Document formatted into pages; contains xvi, 155 p.; also contains graphics. Vita. Includes bibliographical references (p. 152-154).

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32

Kumar, Yadav Susheel. "Damage Detection and Characterization in Plate Like Structures." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/306997.

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Large civil infrastructure systems all over the world have become an integral part of our civilization. The inspection and maintenance of these structures for public safety is a difficult task. The assessment of integrity of such huge structures due to local damages is even more difficult to deal with. The conventional inspections are performed manually, generally by visual examination and sometimes by more advanced techniques like ultrasonic, electromagnetic and fiber optic techniques. These inspections involve human interventions, depend on individual inspector's experience, and are time con

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33

Sawatzky, Rene. "Vibration Based Planetary Gear Analysis and Damage Detection." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1378.

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With this thesis the research at the engineering department is continued, based on previous thesis projects. These projects were considering the possibility of simulation gears with rigid bodies. After researches with different emphasizes on the rigid body simulation, the gained knowledge showed limitations of the rigid body model. Gear failures are very diverse and the actual simulation technique could not represent all necessary failure modes that can occur. That led to this thesis as a research project to find a way to detect and analyze the failure modes that cannot be considered with the

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34

Wickramasinghe, Wasanthi Ramyalatha. "Damage detection in suspension bridges using vibration characteristics." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/87435/1/Wasanthi%20Ramyalatha_Wickramasinghe_Thesis.pdf.

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This research developed a method to detect damage in suspension bridges using vibration characteristics. These bridges exhibit complex vibration and hence it is difficult to use traditional vibration based methods to detect damage in them. This research therefore proposed component specific damage indices and verified their capability to detect and locate damage in the main cables and hangers of suspension bridges.

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35

Acharya, Dabit. "COMPARATIVE EXPERIMENTAL STUDIES FOR GLOBAL DAMAGE DETECTION IN PLATES USING THE SCANNING LASER VIBROMETER TECHNIQUES." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1155079600.

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36

Camacho, Navarro Jhonatan. "Robust structural damage detection by using statistical hybrid algorithms." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/667239.

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This thesis presents the results of applying a statistical hybrid approach for structural health monitoring using piezo actuating signals. Where, by combining statistical processing based on Principal Component Analysis (PCA), cross-correlation functions and pattern recognition methods it was possible to detect, classify and locate damages under varying environmental conditions and possible sensor faults. The proposed methodology consists of first transmiting/sensing guided waves along the monitored structure surface by using piezoelectric (PZT) devices. Then, cross-correlated piezoelectric si

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37

Ge, Ma. "Structural damage detection and identification using system dynamic parameters." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2005. http://wwwlib.umi.com/cr/syr/main.

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38

Mahmood, Lutphy A. "The detection of laser-induced damage in optical materials." Thesis, Loughborough University, 1985. https://dspace.lboro.ac.uk/2134/28137.

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Laser-induced damage caused by the interaction of intense optical radiation with matter is one of the most serious problems encountered in the operation and design of high-energy laser systems. The most widely used technique to detect damage is to simply irradiate and visually inspect the sample for signs of damage. This method although valuable does not provide real-time damage monitoring and has limited quantitative capabilities.

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39

Brett, Peter T. B. "Urban damage detection in high resolution amplitude SAR images." Thesis, University of Surrey, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604334.

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The majority of the world's human population lives in towns and cities. High population densities mean that damage and disruption caused by natural disasters and other events have a much greater impact when urban areas are affected. Satellite remote sensing has the potential to play an important role in urban disaster monitoring and management, thanks to its relative immunity to disruption by terrestrial events. When data is required promptly and at short notice, Synthetic Aperture Radar (SAR) is of particular interest because of its ability to penetrate atmospheric conditions such as cloud an

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40

Dutta, Debaditya. "Ultrasonic Techniques for Baseline-Free Damage Detection in Structures." Research Showcase @ CMU, 2010. http://repository.cmu.edu/dissertations/3.

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This research presents ultrasonic techniques for baseline-free damage detection in structures in the context of structural health monitoring (SHM). Conventional SHM methods compare signals obtained from the pristine condition of a structure (baseline signals) with those from the current state, and relate certain changes in the signal characteristics to damage. While this approach has been successful in the laboratory, there are certain drawbacks of depending on baseline signals in real field applications. Data from the pristine condition are not available for most existing structures. Even if

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41

Gul, Mustafa. "INVESTIGATION OF DAMAGE DETECTION METHODOLOGIES FOR STRUCTURAL HEALTH MONITORING." Doctoral diss., University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3317.

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Structural Health Monitoring (SHM) is employed to track and evaluate damage and deterioration during regular operation as well as after extreme events for aerospace, mechanical and civil structures. A complete SHM system incorporates performance metrics, sensing, signal processing, data analysis, transmission and management for decision-making purposes. Damage detection in the context of SHM can be successful by employing a collection of robust and practical damage detection methodologies that can be used to identify, locate and quantify damage or, in general terms, changes in observable behav

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Uwayed, Ahmed Noori. "Damage detection in laminated composite structures using dynamic analysis." Thesis, University of Leicester, 2018. http://hdl.handle.net/2381/42921.

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Laminated composite materials are used in different applications, for example mechanical, civil and aerospace structures, due to their light weight and excellent mechanical properties. However, fibre breakage and delamination are among the more serious damage that often initiate and propagate due to a number of mechanical and, specifically, dynamic loads during the operational life. Also, these damages destroy design functionality of these structures. To address this issue, damage detection is required in time to provide a good understanding of structure state in advance of any potential failu

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Polimeno, Umberto. "Non linear spectroscopy for damage detection on aerospace materials." Thesis, University of Bath, 2010. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.535639.

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Gong, Peng. "Ultrasonic Signal Processing for Structural Damage Detection and Quantification." Research Showcase @ CMU, 2015. http://repository.cmu.edu/dissertations/674.

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The operation of our society depends heavily on infrastructure systems. To prevent failures and to reduce costs of maintenance, structural health monitoring (SHM) systems have been implemented on an increasing number of infrastructure systems. SHM systems have the potential to give reliable prediction of structural deterioration with less human safety risk and labor costs, and without interruption of normal operations. In the field of SHM, many techniques have been proposed in recent decades. Among these techniques, ultrasonic testing has been widely used for damage characterization in structu

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Sharma, Utshree. "Damage Detection in a Steel Beam using Vibration Response." Youngstown State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1596222984454508.

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Smit, Wynand Gerhardus. "Fan blade damage detection using on-line vibration monitoring." Diss., Pretoria : [s.n.], 2002. http://upetd.up.ac.za/thesis/available/etd-11302005-091637/.

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47

Goi, Yoshinao. "Bayesian Damage Detection for Vibration Based Bridge Health Monitoring." Kyoto University, 2018. http://hdl.handle.net/2433/232013.

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48

Anderson, Matthew Francis. "Parametric investigation of strain gauges in structural damage detection." Thesis, University of Iowa, 2013. https://ir.uiowa.edu/etd/2436.

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Vibration-based damage detection (VBDD) methods are used to detect damage in structural members non-evasively. This investigation began with two objectives: to prove a VBDD method could detect damage using strain gauges both analytically and experimentally, and to then use that method to determine the distance from a damaged area that strain gauges could be effective. Work began simultaneously using finite element software and physical experiments. It was determined that a VBDD method could detect damage with strain gauges

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49

Long, James Ph D. Massachusetts Institute of Technology. "Automated structural damage detection using one class machine learning." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90062.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 101-103).<br>Measuring and analysing the vibration of structures using sensors can help identify and detect damage, potentially prolonging the life of structures and preventing disasters. Wireless sensor systems promise to make this technology more affordable and more widely applicable. Data driven structural health monitoring methodologies take raw signals obtained from sensor networks, and process

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Angelopoulos, Nikolaos. "Damage detection and damage evolution monitoring of composite materials for naval applications using acoustic emission testing." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7597/.

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Maritime transport has profound importance for the world economy. Vessels of all sizes constantly transport large numbers of passengers and goods across the sea, often under adverse operational conditions. Vessels need to exhibit high levels of reliability, availability, maintainability and safety (RAMS). However, at the same time their performance needs to be optimised ensuring the lowest possible fuel consumption with the maximum operational capacity and range without compromising RAMS. Sweating of naval assets and profitability should be maximised for the operator ensuring investment in fut

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