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 20 of 24 for “"Non-destructive Techniques"”.
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Leather inspection and characterization using non-destructive techniques
… requires removal of samples and is either destructive and/or incompatible with real time operation, and little or no information about the rest of the skin is provided.A novel mechanical scanning system was built for non-destructive leather testing. The investigation was focused on two of …
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Residual stress measurements and analysis by destructive and non-destructive techniques
… of residual stresses were performed by both destructive and nondestructive techniques including ring-core (RC), neutron diffraction (ND) and positron annihilation spectroscopy (PAS). The results obtained by the PAS method indicate that the residual stresses in the cold-worked specimens were …
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Non-destructive techniques for damage analysis in standards and hybrid bearings
L'abstract è presente nell'allegato / the abstract is in the attachment
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Thermo-optic Phase Spectroscopy techniques for multiscale thermal conductance characterization in semiconductor integrated circuits
… Phase Spectroscopy (TOPS), a family of non-destructive techniques for multiscale thermal conductance characterization across bulk materials, buried films and interfaces, and nanoscale films. Three variants are developed: Displacement TOPS (D-TOPS) for bulk solids, Immersion TOPS (I-TOPS) …
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Caracterização do efeito whitening em polifluoreto de vinilideno (PVDF) por ensaio ultrassônico
… using the ultrasound test. Therefore, the techniques which used were the measurements of sonic velocity, spectral Fourier analysis, second order moment, Hurst analysis (R / S) and dentreded fluctutation analysis (DFA). Optical density measurements were performed to confirm and quantify the …
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Degradation studies on different pigments and binders: new approaches to diagnostics in cultural heritage
… case of San Giovanni white with the help of a non-invasive technique (Raman spectroscopy), and the characterization of the degradation path and individuation of the respective alteration products in the case of Red vermilion and Cd-pigments, always favouring the choice of a non-destructive …
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Matter wave optical techniques for probing many-body targets
… atoms in an optical lattice. We investigate non-destructive techniques for probing the superfluid to Mott insulator transition by studying the scattering cross section of the cold atoms for matter waves. We show that the angular cross section of the target lattice for a matter wave depends …
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Studies on neutron diffraction and X-ray radiography for material inspection
… and neutron diffraction are two widely known non-destructive techniques for material inspection. Here we demonstrate the design of neutron diffractometer with low power source and analyze the digital image produced by the X-ray radiography instead of neutron diffraction because of the …
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The effect of interlayers on the mechanical response of composite laminates subjected to in-plane loading conditions
… were furnished in an interlayered and baseline (non-interlayered) configuration. The interlayers, 0.0005 in. each in thickness, appeared between each ply in every Iaminate tested. Both configurations of these two material systems were subjected to a regimen of in-plane loading tests. These tests …
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Critical literature review on concrete crack repairs
… the mechanisms resulting in concrete cracking, techniques to determine concrete cracking, practices for prevention of concrete cracking and concrete crack repair techniques. Causes of cracking include alkali silica reactions (ASR), steel reinforcement corrosion, shrinkage, thermal variations, …
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Ultrasonic phased array imaging and data post processing with applications to resistance spot welding
… yield strength have been evaluated using both destructive and non-destructive techniques. One of the more recent advancements involves the use of real time monitoring of the resistance spot weld using a single element transducer placed inside the welding electrode. This transducer allows for a …
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Characterizing Organic Coatings on Renaissance Bronzes with Short-Wave Infrared and Mid-Infrared Spectroscopy
… over time, and the practical constraints of non-invasive analysis on museum objects. To address these challenges, this research developed a reproducible protocol for characterizing SOCs using non-destructive techniques—specifically external reflection Fourier transform infrared spectroscopy …
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Development of the small punch test platform to evaluate the embrittlement of power plant materials
… practises. Mechanical, metallurgical and non-destructive techniques are used to evaluate the condition of the in-service materials in order to aid in these life assessments. The structural integrity assessments utilise material toughness properties as determined through fracture toughness …
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Dynamic performance of pre-cast prestressed beams – cast in-situ slab composite bridges
… until catastrophic failure occurs. Localized non-destructive techniques such as ultrasonic techniques, radar method, impact testing, magnetic based methods and proof load tests are limited to small areas, time consuming and require prior knowledge of the damaged zone. These limitations can be …
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Non-destructive Electrical Characterization of Controlled Waspaloy Microstructures
… in this alloy via electrically-based ac/dc non-destructive techniques. Correlations were developed between electrical measurements and alternate characterization techniques such as Ultra Small Angle X-ray Scattering (USAXS), Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) to …
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Modelling the mechanical behaviour of the interface between prosthesis and bone
… representative of the cement-bone interface. Two non-destructive techniques, micro CT imaging and acoustic emission, were used to monitor damage evolution in the interfacial region, with the aim of validating finite element models of the interface. Initiation and progression of damage through the …
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Applicazione di tecniche diagnostiche non distruttive per la caratterizzazione dei materiali costruttivi di natura carbonatica
… when durability is being considered), using non-destructive analytical methods - ultrasonic and thermographic methods - in a novel way for this specific material. These methods should offer an additional option to the macroscopic identification of these materials and conventional laboratory …
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Positron Annihilation lifetime studies of inorganic materials using a new positron beamline
… progress. With improvements in fabrication techniques, nanoscale structures can now be produced with growing control. As a result, techniques to characterise these properties have been developed and are also becoming increasingly important. One such collection of non-destructive techniques, …
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Positron Annihilation lifetime studies of inorganic materials using a new positron beamline
… progress. With improvements in fabrication techniques, nanoscale structures can now be produced with growing control. As a result, techniques to characterise these properties have been developed and are also becoming increasingly important. One such collection of non-destructive techniques, …
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