Nondestructive Evaluation

Shull, Peter J.

doi:10.1201/9780203911068

Cited by 258 publications

(65 citation statements)

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“…This is a modular x-ray microscope that can acquire both digital radiography and tomography data. [28] KCAT employs a 150 kV polychromatic Kevex sealed-tube x-ray source. The x-ray tube was operated at 60 kV and 0.082 mA current with a tungsten anode.…”

Section: Methodsmentioning

confidence: 99%

X-ray imaging of cryogenic deuterium-tritium layers in a beryllium shell

Kozioziemski

Sater

Moody

et al. 2005

Journal of Applied Physics

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Solid deuterium-tritium (D-T) fuel layers inside copper-doped beryllium shells are robust inertial confinement fusion fuel pellets. This paper describes the first characterization of such layers using phase-contrast x-ray imaging. Good agreement is found between calculation and experimental contrast at the layer interfaces. Uniform solid D-T layers and their response to thermal asymmetries were measured in the Be(Cu) shell. The solid D-T redistribution time constant was measured to be 28 min in the Be(Cu) shell.

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Section: Methodsmentioning

confidence: 99%

X-ray imaging of cryogenic deuterium-tritium layers in a beryllium shell

Kozioziemski

Sater

Moody

et al. 2005

Journal of Applied Physics

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“…These sources can create an excitation source that can be used in the same way as if an active excitation were used to interrogate the structure. This excitation source is a primary component in non-destructive evaluation (NDE), where the most common way to interrogate a structure and detect the presence of damage is by transmitting a known signal through the structure and receiving at another point [11]. The transfer function describing the structure's response is known as the impulse response function or Green's function.…”

Section: Introductionmentioning

confidence: 99%

Application of damage detection methods using passive reconstruction of impulse response functions

Tippmann

Zhu

Scalea

2015

Phil. Trans. R. Soc. A.

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In structural health monitoring (SHM), using only the existing noise has long been an attractive goal. The advances in understanding cross-correlations in ambient noise in the past decade, as well as new understanding in damage indication and other advanced signal processing methods, have continued to drive new research into passive SHM systems. Because passive systems take advantage of the existing noise mechanisms in a structure, offshore wind turbines are a particularly attractive application due to the noise created from the various aerodynamic and wave loading conditions. Two damage detection methods using a passively reconstructed impulse response function, or Green's function, are presented. Damage detection is first studied using the reciprocity of the impulse response functions, where damage introduces new nonlinearities that break down the similarity in the causal and anticausal wave components. Damage detection and localization are then studied using a matched-field processing technique that aims to spatially locate sources that identify a change in the structure. Results from experiments conducted on an aluminium plate and wind turbine blade with simulated damage are also presented.

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“…The images are processed by computers and any lack of integrity on the surface or inside the structure is detected. Several parameters are involved in detection techniques to have clear and accurate results, such as material properties of tested objects and depth and size of the defect [8]. Active infrared thermography requires the experimental setup design.…”

Section: Introductionmentioning

confidence: 99%

“…Active infrared thermography requires the experimental setup design. Effective experimental design requires the predetermination of the radial frequency of the boundary excitation that corresponds to certain temperature amplitude, since this parameter is correlated with the size and characteristics of the flaws [8].…”

Section: Introductionmentioning

confidence: 99%

The design of infrared non-destructive testing for investigation multi-layer materials

Borazjani¹,

Spinello²,

Necsulescu³

2012

Proceedings of the 2012 International Conference on Quantitative InfraRed Thermography

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-The inverse heat conduction in a multi-material slab with periodic temperature excitation is investigated. We derive a polynomial relation to estimate the frequency of the periodic excitation as a function of the temperature amplitude at a given observation point in the material specimen. The formula includes characteristic geometric and material parameters of the system. The polynomial formula can be an effective design tool for quick frequency predetermination in the design of non-destructive testing experiments with infrared thermography. The convergence and accuracy of the formula are assessed by comparison with analytical thermal quadrupoles solution.

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Nondestructive Evaluation

Cited by 258 publications

References 0 publications

X-ray imaging of cryogenic deuterium-tritium layers in a beryllium shell

X-ray imaging of cryogenic deuterium-tritium layers in a beryllium shell

Application of damage detection methods using passive reconstruction of impulse response functions

The design of infrared non-destructive testing for investigation multi-layer materials

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