Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"damage localization"”.
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Design And Evaluation of Flexibility-Based Structural Damage Localization Using Wireless Sensor Networks
… We designed and implemented a system to localize damages on structures with a WSN by detecting the change in structure flexibility. This method has been validated to work well on bridges like a cantilever beam and a truss. It is also possible to be extended to other type of structures. Different …
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Towards Multiclass Damage Detection and Localization using Limited Vibration Measurements
Traditional vibration-based damage detection methods provide structural health information based on their measured data (i.e., acceleration and displacement response). Over the last few decades, various model-based and time-frequency methods have shown great promises for damage identification and …
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Identification of singularities in the displacement field for damage detection in structures
In this thesis, the damage identification problem in beam-type structures through displacement field and the relevant challenges are studied. The exploration includes one damage localization approach using mode shapes and two damage identification methodologies based on static meas-urements. The …
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Inference and uncertainty quantification for unsupervised structural monitoring problems
… about the response of structures at all possible damaged states. Additionally, the measured responses at various locations on a structure are statistically dependent due to their connectivity via the structural elements. Ignoring such dependencies may result in inaccurate predictions, usually by …
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Structural Damage Detection and Assessment From Spatially Sparse and Noise -Polluted Modal Response
A global damage detection and assessment algorithm is developed based on a parameter estimation method using the measured modal response of a structure. Damage is characterized by a reduction in a constitutive property of a parameterized finite-element model of the structure between two discrete …
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Damage Detection and Sensor Placement Strategies for Structures Under Frequency-Domain Dynamics
<p>Identification and monitoring of damage have a growing importance in the maintenance of structures. With advances in high performance computing, numerical modeling tools are becoming more common in anomaly detection and structural damage localization. However, many methods presuppose that …
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Learning Structures : fusing deconvolution-based seismic interferometry with Bayesian inference for structural health assessment
… methodology for structural identification and damage detection via fusing the concepts of seismic interferometry and Bayesian inference. Firstly, a deconvolution-based seismic interferometry approach is employed to obtain the wave-forms that represent the impulse response functions (IRFs) with …
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Nonlinear System Identification of Physical Parameters for Damage Prognosis and Localization in Structures
… thus, is to develop quantitative assessment of damage accumulation from the earliest stages of the fatigue process and to provide a structure's signature that is dependent of the damage stage. One such signature is the structure's response to forced excitation. The realization of such a goal …
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Geophysical signatures of crack initiation and growth in rocks under uniaxial compression
… has been implemented to investigate the damage processes in rock under time-independent and time-dependent loading conditions. Prismatic Barre granite specimens were used for testing to ensure a planar surface for accurate in-plane 2D-DIC measurements. In the first part of the thesis …
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Elastic-plastic-brittle transitions using anti-plane elastic spring lattice model
Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2012-12-12T17:17:28Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 3 Kale_Sohan.pdf: 2772367 bytes, checksum: 98b630c1abd6006770e7fb347c8c4985 (MD5) Kale_Sohan.docx: 6391827 bytes, checksum: …
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Multifunctional composite structures with damage sensing capabilities
… multifunctional composite structures with damage sensing capabilities towards the development of integrated non-destructive inspection (NDI) and structural health monitoring (SHM) capabilities. Two routes were identified and selected for further investigation; the enhancement of …
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Advanced functional and sequential statistical time series methods for damage diagnosis in mechanical structures
… witnessed major developments in vibration based damage detection and identification, also collectively referred to as damage diagnosis. Moreover, the past 10 years have seen a rapid increase in the amount of research related to Structural Health Monitoring (SHM) as quantified by the significant …
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Dynamic Strain Measurement Based Damage Identification for Structural Health Monitoring
… presented to detect, locate, and quantify the damages that are likely to occur in structures. In this study, the structural damage is identified as a reduction in the stiffness characteristics of the structural elements. The primary focus of this study is on the utilization of measured dynamic …
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Mechanical behavior of nonwoven felts
… polypropylene fibers. The deformation and damage micromechanisms of the glass-fiber non-woven felt were analyzed with a combination of experiments and simulations. Tensile tests were carried out on unnotched and notched rectangular panels to ascertain the physical phenomena which control …