Littérature scientifique sur le sujet « Non-Destructif Testing »
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Articles de revues sur le sujet "Non-Destructif Testing"
Passilly, Bruno, Benjamin Lamboul et Jean-Michel Roche. « Indentation haute fréquence : vers le contrôle non-destructif des structures ». Matériaux & ; Techniques 105, no 1 (2017) : 110. http://dx.doi.org/10.1051/mattech/2017026.
Texte intégralCaplain, R. « Le contrôle non destructif des matériaux composites à matrice métallique renforcés par particules. Ãtat de l'artNon-destructive testing of metal matrix composites reinforced by particles. State-of-the-art ». Mécanique & ; Industries 3, no 1 (février 2002) : 15–25. http://dx.doi.org/10.1016/s1296-2139(01)01129-0.
Texte intégralJaoua, Mohamed, Slim Chaabane, Chokri Elhechmi, Juliette Leblond, Moncef Mahjoub et Jonathan R. Partington. « On some robust algorithms for the Robin inverse problem ». Revue Africaine de la Recherche en Informatique et Mathématiques Appliquées Volume 9, 2007 Conference in... (21 août 2008). http://dx.doi.org/10.46298/arima.1903.
Texte intégralThèses sur le sujet "Non-Destructif Testing"
Rodat, Damien. « Simulation opérationnelle en contrôle non destructif ». Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS535.
Texte intégralSeveral fields have already adopted the concept of operational simulation to limit risks and costs. For instance, part of the training phase of airline transport pilots or surgerons can now rely on simulations instead of real-life situations.Non-Destructive Testing (NDT) assesses the integrity of structural and mechanical components without damaging them. Operational simulation has drawn attention of the NDT community only recently through an Airbus patent. In this field, the operational simulation can be used to simulate the presence of a defect in a component without actually inserting the defect. For expensive parts such as aeronautical structures, this approach can reduce the costs of training operators, evaluating NDT method performances or testing new procedures in real-conditions.This thesis work aims to apply the concept of operational simulation to NDT. Three main scientific and technological challenges are to be tackled: the simulation realism, the computation speed and the instrumentation. We chose to focus this study on the ultrasound NDT technique applied to composite materials. Classical simulation approaches based on physical equations are not fast enough for a real-time synthesis of ultrasound signals. Moreover, the realism is often limited by the fidelity of the inspection set-up description. For instance, the material properties are not always well-known and bring to a drop of realism. Thus, we investigate an alternative way: the models are built directly from experimental data. This strategy is applied to model the effect of several phenomena such as impact damages, flat bottom holes or material micro-structure. Hardware and software solutions are also studied to propose a first prototype. We have shown that the replacement of real signals by on-the-fly simulated ones is achievable: the simulation is realistic enough to be considered as reality by operators. thus, this thesis work brings the concept to a first prototype dedicated to ultrasound NDT
Duan, Yuxia. « Probability of detection analysis for infrared nondestructive testing and evaluation with applications including a comparison with ultrasonic testing ». Doctoral thesis, Université Laval, 2014. http://hdl.handle.net/20.500.11794/25251.
Texte intégralThe reliability of a Non-Destructive Testing and Evaluation (NDT& E) technique is one of the most important aspects of the overall industrial inspection procedure. The Probability of Detection (PoD) curve is the accepted quantitative measure of the NDT& E reliability, which is usually expressed as a function of flaw size. Every reliability experiment of the NDT& E system must be well designed to obtain a valid source data set, including the infrared thermography (IRT) technique. The range of defect aspect ratio (Dimension / depth) values is designed according to our experimental experiences to make sure it is from non-detectable to minimum detectable aspect ratio and larger. A preliminary test will be implemented to choose the best inspection parameters, such as heating energy, the acquisition time and frequency. In the data and image processing procedure, several important parameters which influence the results obtained are also described. For active IRT, there are different heating sources (optical or ultrasound), heating forms (pulsed or lock-in) and also data processing methods. Distinct heating and data processing manipulations produce different inspection results. In this research, both optical Pulsed Thermography (PT) and Lock-in Thermography (LT) techniques will be involved in the PoD analysis. For PT, PoD curves of different data processing methods are compared, including Fourier Transform (FT), 1st Derivative (1st D) after Thermal Signal Reconstruction (TSR), Wavelet Transform (WT), Differential Absolute Contrast (DAC), and Principal Component Thermography (PCT). Systematic studies on PoD analysis for IRT technique are carried out. Additionally, constructed PoD curves of IRT technique are compared with those obtained by other traditional NDT& E approaches.
Carcreff, Ewen. « Déconvolution adaptative pour le contrôle non destructif par ultrasons ». Thesis, Le Mans, 2014. http://www.theses.fr/2014LEMA1009/document.
Texte intégralThis thesis deals with the ultrasonic non destructive testing of industrial parts. During real experiments, the signals received by the acoustic transducer are analyzed to detect the discontinuities of the part under test. This analysis can be a difficult task due to digital acquisition, propagation effects and echo overlapping if discontinuities are close. Sparse deconvolution is an inverse method that aims to estimate the precise positions of the discontinuities. The underlying hypothesis of this method is a sparse distribution of the solution, which means there are a few number of discontinuities. In the literature, deconvolution is addressed by a linear time-invariant model as a function of propagation distance, which in reality does not hold.The purpose of this thesis is therefore to develop a model and associated methods in order to cancel the effects of acquisition, propagation and echo overlapping. The first part is focused on the direct model development. In particular, we build a linear time-variant model that takes into account dispersive attenuation. This model is validated with experimental data acquired from attenuative materials. The second part of this work concerns the development of efficient sparse deconvolution algorithms, addressing the minimization of a least squares criterion penalized by a L0 pseudo-norm. Specific algorithms are developed for up-sampled deconvolution, and more robust exploration strategies are built for data containing oscillating waveforms. By using synthetic and experimental data, we show that the developed methods lead to better results compared to standard approaches for a competitive computation time. The proposed methods are then applied to real non destructive testing problems where they confirm their efficiency
Trifonov, Andrey. « Contrôle non destructif par des méthodes d'acoustique non linéaire pour des applications aéronautiques ». Thesis, Ecole centrale de Lille, 2017. http://www.theses.fr/2017ECLI0006/document.
Texte intégralThis PhD thesis work contributes to the development of nonlinear elastic methods for non-destructive testing and imaging of contact-type defects in solids.In this work, two modifications of recent nonlinear nondestructive testing methods are suggested: the coda wave interferometry combined with the nonlinear time reversal principle and air-coupled nonlinear ultrasonic imaging. The principal advantage of former technique is in its extremely high sensitivity owing to the fact that weak changes in sample's parameters are accumulated and finally greatly amplified during the formation of the coda wave. The other technique has a complimentary strength and offers a possibility of a remote detection. The developed techniques are tested on samples with artificially fabricated defects at known locations. The performance of each method is accessed and the potential for obtaining robust nonlinear images is demonstrated.The second part of the work is concerned with a theoretical description of contact acoustical nonlinearity and its use for creating of a numerical toolbox capable of simulating wave propagation in complex structures containing internal contacts. A physical model describing the tangential shift of two contacting bodies in the presence of friction has been proposed. Its result is an analytical computer-assisted solution for hysteretic relationships between normal and tangential contact displacements and loads. The contact model and derived load-displacement relationships are used as boundary conditions posed at the internal boundaries (contact surfaces) in a finite element wave propagation model programmed via commercial software
Hesabi, Somayeh. « 3D modeling of large elongated structures for non-destructive testing and inspection ». Doctoral thesis, Université Laval, 2017. http://hdl.handle.net/20.500.11794/27640.
Texte intégralAccording to a Central Intelligence Agency (CIA) report ¹ presented in a flagship NDT journal ², there were a total of 3.3 million km of pipelines present in 120 countries in the world in 2014. This means that pipelines play an important role in the energy infrastructure in order to safely transport liquid or natural gas. Although pipelines are the most efficient and reliable way to carry various liquids ranging from water to oil, they are vulnerable to external and internal damages. Fortunately, a periodic inspection of pipelines can increase their functionality and decrease the environmental disasters as well as economic losses caused by potential spills, explosions or other malfunctions. In this context of the exploitation of pipelines and other similar elongated structures and considering the benefits of 3D sensors which allow us to create an accurate digital replica of the surface of physical objects in addition to the advantages of Non-Destructive Testing (NDT) technology which provides the ability of under-surface monitoring, our research proposes a solution to build a 3D model of pipeline or other elongated structures to monitor their status. For this purpose, we first measure the geometry of the pipeline by handheld 3D scanners and construct the 3D model of the structure. Then, the information of subsurface defects that is estimated efficiently by approaches developed by other team members using infrared thermography is integrated to the reconstructed 3D model. The manuscript investigates different challenges related to the 3D modeling of large elongated structures with high accuracy and repeatability for quality control purposes as well as for long-term maintenance. 1. The World Factbook, updated 18 May 2015. 2. Materials Evaluation (M.E.), vol. 73, no. 7, July 2015
Dahia, Abla. « Contribution à la caractérisation non destructive de matériaux magnétiques sous contraintes par méthode électromagnétique ». Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112391.
Texte intégralThe non-destructive evaluation (NDE) technique by eddy current (EC) is a conceivable solution to characterize the stress state in magnetic materials. The approach relies on the high sensitivity of eddy current (EC) signals to the magnetic permeability, itself highly dependent on stress. The EC technique is potentially attractive compared to other NDE methods such as X-ray diffraction, due to its simple practical implementation, easiness of automation and low cost. In order to allow eventually the inverse identification of stress states in magnetic materials, a predictive model for the evolution of an EC probe signal as a function of stress has been developed during this thesis. The modelling is done in two steps. First, the effect of stress on the magnetic permeability is described using a simplified version of a multiscale model for magneto-elastic behaviour. This approach allows describing the effect of multiaxial mechanical loadings on the magnetic behaviour of materials including induced anisotropy effects. Then, the EC probe signal is determined as a function of the anisotropic permeability of the stressed material using the finite element method (FEM). In order to validate the modelling approach, an experimental setup for magnetic characterisation and EC measurements was developed. The measurements show a good qualitative accordance with the modelling results, in absence of any calibration. A calibration procedure based on a measurement under stress is necessary to obtain a quantitative agreement. The proposed model can be used to design efficient EC probes and to define optimal operating conditions to evaluate stress in magnetic materials. The development of inversion procedures, however, remains a challenge
Raillon, Raphaële. « Mécanisme de formation des échos ultrasonores transitoires sur des cibles immergées de formes simples : application au contrôle non destructif ». Châtenay-Malabry, Ecole centrale de Paris, 1993. http://www.theses.fr/1993ECAP0286.
Texte intégralGranados, Gerardo Emanuel. « Machine learning based simulation of realistic signals for an enhanced automatic diagnostic in non-destructive testing applications ». Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPAST143.
Texte intégralModel-based solutions for automatic diagnostics in the field of non-destructive testing are currently a topic of great interest in both academic and industrial communities. Their ultimate objective is to provide a qualitative or quantitative evaluation of the inspected material state (sound, flawed, flawed with anomaly dimensions or criticality) in an industrial context like a production line. Such tools, providing inputs for real-time process control, contribute to the general trend in Europe that aims at modernizing industry and services. The CEA LIST Institute is an internationally recognized research institution in non-destructive testing and evaluation (NDT&E). It develops the CIVA software, which offers multi-physics models and is considered a leading product for simulation for NDT&E applications. Accurate models able to reproduce experimental signals prove very helpful in an inversion process aiming at classifying or characterizing flaws. However, as they do not account for disturbances and parameter variability occurring during an experimental acquisition, simulated signals inherently look "perfect" and are, for instance, easily distinguishable from experimental data. This PhD subject aims to improve the match between simulation and experimental data by augmenting the simulation with another contribution generally referred to as "noise". The strategy proposed to obtain such noise contribution is to apply machine-learning techniques to a set of representative experimental data. Alternatively, a deep learning model can be trained to analyze "real" data and distinguish between contents (flaw signals) and style (the rest, which physical models do not simulate). Afterwards, the augmented simulation tool will be able to reproduce closely experimental data, account for specific discrepancies due to a particular environment and reproduce the variability observed experimentally. It will thus enhance the performance of model-based tools developed at CEA LIST for sensitivity analysis, management of uncertainty and diagnostic
Chouh, Hamza. « Simulations interactives de champ ultrasonore pour des configurations complexes de contrôle non destructif ». Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1220/document.
Texte intégralIn order to fulfill increasing reliability and safety requirements, non destructive testing techniques are constantly evolving and so does their complexity. Consequently, simulation is an essential part of their design. We developed a tool for the simulation of the ultrasonic field radiated by any planar probes into non destructive testing configurations involving meshed geometries without prominent edges, isotropic and anisotropic, homogeneous and heterogeneous materials, and wave trajectories that can include reflections and transmissions. We approximate the ultrasonic wavefronts by using polynomial interpolators that are local to ultrasonic ray pencils. They are obtained using a surface research algorithm based on pencil tracing and successive subdivisions. Their interpolators enable the computation of the necessary quantities for the impulse response computation on each point of a sampling of the transducer surface that fulfills the Shannon criterion. By doing so, we can compute a global impulse response which, when convoluted with the excitation signal of the transducer, results in the ultrasonic field. The usage of task parallelism and of SIMD instructions on the most computationally expensive steps yields an important performance boost. Finally, we developed a tool for progressive visualization of field images. It benefits from an image reconstruction technique and schedules field computations in order to accelerate convergence towards the final image
Groz, Marie-Marthe. « Reconstruction 3D de sources de chaleur volumiques à partir des champs de température de surface mesurés par thermographie InfraRouge ». Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0135.
Texte intégralNon Destructive Testing (N.D.T.) of materials and structures is a very important industrial issue in the fields of transport, aeronautics and space and in the medical domain. Active infrared thermography is a N.D.T. method that consists in providing an external excitation to cause an elevation of temperature field in the material and then to evaluate the resulting temperature field at the surface. However, thermal exciters used (flash lamps, halogen, lasers) act only on the surface of the sample. Several energy conversion systems can on the other hand lead to the generation of volumetric sources: the phenomena of thermo-acoustic, thermo-induction, thermomechanic or thermochemistry can be cited. For example, ultrasonic waves can generate volumetric heat sources if the material is viscoelastic or if there is a defect. The reconstruction of these sources is the first step for the quantification of parameters responsible of the heating. Characterizing a heat source means reconstructing its geometry and the power it generates. For example, a defect in a structure and / or the viscoelasticity of a material can be detected and quantified by this technique if it acts directly on temperature field. However, identification of volumetric heat sources from surface temperature fields is a mathematical ill-posed problem. The diffusive nature of the temperature is the main cause. In this work, the 3D reconstruction of the volumetric heat sources from the resulting surface temperature field, measured by InfraRed, is studied. First, an analysis of the physical problem enables to specify the limits of the reconstruction. In particular, a criterion on achievable spatial resolution is defined and a reconstruction limitation for in-depth sources is highlighted. Then, a probabilistic approach for the reconstruction is proposed and compared to existing inverse methods. The computation time and noise sensitivity are studied for each of these methods. Numerical and experimental applications will thus be presented to illustrate the results
Livres sur le sujet "Non-Destructif Testing"
Bray, Don E. Nondestructive testing techniques. New York : Wiley, 1992.
Trouver le texte intégralLeonard, Mordfin, dir. Handbook of reference data for nondestructive testing. West Conshohocken, PA : ASTM, 2002.
Trouver le texte intégralCox, Jim. Nondestructive testing, eddy current : Classroom training handbook. Sous la direction de General Dynamics Corporation. Convair Division. Harrisburg, NC : PH Diversified, Inc., 1997.
Trouver le texte intégralMalhotra, V. M. Handbook on nondestructive testing of concrete. 2e éd. Boca Raton, Fla : CRC, 2004.
Trouver le texte intégralSymposium on Quantitative Nondestructive Evaluation (26th 1999 Montréal, Canada). Review of progress in quantitative nondestructive evaluation : [proceedings of the Twenty-sixth annual Symposium on Qualitative Nondestructive Evaluation, held July 25-30, 1999, Montréal, Canada]. Sous la direction de Chimenti Dale E et Thompson Donald O. Melville, N.Y : American Institute of Physics, 2000.
Trouver le texte intégralCloud, Gary L. Optical methods of engineering analysis. Cambridge : Cambridge University Press, 1995.
Trouver le texte intégralLiu, G. R. Elastic waves in anisotropic laminates. Boca Raton, USA : CRC Press, 2001.
Trouver le texte intégralInstitute, Welding, et International Institute of Welding, dir. Non-destructive examination of underwater welded steel structures. Cambridge : Abington Pub., 1999.
Trouver le texte intégralMarc, Deschamps, et SpringerLink (Online service), dir. Ultrasonic Wave Propagation in Non Homogeneous Media. Berlin, Heidelberg : Springer Berlin Heidelberg, 2009.
Trouver le texte intégralCanada Centre for Mineral and Energy Technology. et Metals Technology Laboratories (Canada), dir. Certified nondestructive testing personnel to Canadian General Standards Board : Revised list to July 31, 1992 = Personnel affecté au contrôle non destructif certifié selon L'Office des normes générales du Canada : liste mise à jour au 31 juillet 1992. Ottawa : Canada Centre for Mineral and Energy Technology, 1992.
Trouver le texte intégralChapitres de livres sur le sujet "Non-Destructif Testing"
« Non-destructive testing Essais non-destructif Zerstörungsfreie Werkstoffprüfung ». Dans Composite Materials, 143–58. Elsevier, 1985. http://dx.doi.org/10.1016/b978-0-408-22165-8.50015-1.
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