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 10 of 10 for “"deformation measurement"”.
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Full-field deformation measurement in wood using digital image processing
… used to non-destructively measure the full-field deformation on aluminum and wood specimens loaded in compression and bending. The measurement technique consisted of creating a random speckle pattern on the specimen surface, recording images before deformation and after deformation, and computing …
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Integrative Geophysical and Environmental Monitoring of a CO2 Sequestration and Enhanced Coalbed Methane Recovery Test in Central Appalachia
… wells tracer studies, borehole liquid level measurement, microseismic monitoring, surface deformation measurement, and various well logs and tests. Integrated interpretations of monitoring results from Phase I of the test have characterized enhanced permeability, geomechanical variation with …
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Evaluation of the laboratory resilient modulus test using a New Mexico subgrade soil
… stresses under confining stresses, while axial deformations are measured. By definition Mr is the ratio of the peak axial stress to the corresponding recoverable axial strain. Currently, there are two accepted laboratory testing protocols for determining Mr, namely AASHTO T 307 and NCHRP 1-28A. …
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The mechanics of an unbonded locked sand at low effective stresses
… address this shortcoming, a digital image-based deformation measurement technique has been developed. Three digital cameras placed on radii at intervals of 120 degrees viewed on plan outside a transparent triaxial cell are used to capture images of the deforming samples at various instants. A …
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Feasibility study into the use of digital image correlation for creep strain monitoring of fossil power plant welds
… material creep damage - an irreversible plastic deformation of the material when subjected to temperatures and loads beyond a certain threshold. Within Eskom, the South African parastatal power utility, creep damage is primarily quantified by way of Metallographic Replication (replicas). This is …
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Parameters affecting interferometric coherence and implications for long-term operational monitoring of mining-induced surface deformation
Surface deformation due to underground mining poses risks to health and safety as well as infrastructure and the environment. Consequently, the need for long-term operational monitoring systems exists. Traditional field-based measurements are point-based meaning that the full extent of deforming …
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Dynamic Loading of Soil-Cement for Flexible Pavement Design
… the beam specimen.<br/> <br/>The techniques of deformation measurement have been investigated, and a transducer system of high accuracy LVDT's developed. This system can meet most of the testing requirements such as reliability, accuracy at high frequency, ease of preparation and …
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Improved reservoir characterization by incorporating geodetic data in a western Kazakhstan oilfield
… data to better inform model assumptions. Surface deformation measurement by InSAR is used to provide subsurface insights using as an example the "Polygon" field in Kazakhstan. This workflow leads to several key conclusions which could only be realized traditionally by drilling additional …
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Hierarchical cell fluid extracellular matrix interaction in cell microenvironment
… mechanical transmission of freezing induced ECM deformation, it was hypothesized that the subsequent intracellular deformation depends on the cytoskeletal structure, configuration of cell-ECM adhesion and deformation at cell-ECM interface which are anticipated to determine the outcome of …
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Photogrammetrische Erfassung der Verformungs- und Rissentwicklung bei baumechanischen Untersuchungen
… Diese ermöglicht besonders bei sehr hochgenauen Deformations- bzw. Dehnungsmessungen ein großes Genauigkeitspotential im Sub-Pixelbereich, das im 1/100 eines Pixels liegt. In Bezug auf die photogrammetrischen Auswerteprozesse wurden optimierte Bildzuordnungsverfahren implementiert, die …