Evaluation non destructive par ultrasons de matériaux composites. GDR MIC . Développement ou optimisation de techniques avancées de CND-END ;. Le Cetim-Cermat dispose de nombreuses techniques CND et les Ultrasons ( US) conventionnels; Ultrasons multiéléments et/ou par immersion; ToFD (Time of . Boutique propulsée par PrestaShop. Nouvelles vérifications d’appareils CND. Last Tweets. Tweets by EKOSCAN. THEY TRUST US. logo Onet Logo Mistras.

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VolumeNumberFebruary Fatigue damage, measurements and monitoring Part 2. Development of a ultrasos base for inspection of aerospace structures using guided waves.

Audrey Kamta Djakou 1 AuthorId: Validation and prototype development of a novel touchscreen application based on guided wave reflection. These techniques rely on ultrasonic phased arrays probes, to master the direction and focus the ultrasound beam radiated in the component, so as to optimize the detection and sizing of defects. Test methodology for thickness measurement of soft material solidification front at high temperatures.

Design and integration of a SHM system for inspection of bonded composite joints.

Scientific Solutions

The performance of these different techniques are evaluated experimentally and compared with simulations.

Alcan — Ultrasns Tinto Financement: Friday, December 30, – 3: The phenomena of thermal or mechanical fatigue of materials lead to the alteration of structures, up to the creation of cracks. Development of a knowledge base for inspection of aerospace structures using guided waves Realizations: Development of a non-contact inspection process of cardboard tubes for conformity certification and adjustments of the production line.

cd Looks like Javascript is disabled on your browser. The aim of nondestructive testing NDT is to detect these cracks and determine their size, required for determination of their harmfulness and damage to the structure. Results obtained with this method are compared with those of the Sommerfeld method for this diffraction problem.


Touchscreen application based on guided wave reflection Partenaire industriel: Previous article Next article. Audrey Kamta Djakou 1 Details.

Techniques de contrôles et essais non destructifs (CND-END)

Results 1 – 1 of 1. The interaction between ultrasound waves and discontinuities or cracks present in the structure leads to echoes observed at reception, whose interpretation will enable to size or to characterize the defects responsible for these echoes. The head wave propagation along an irregular entry surface is shown by a numerical study to be not only a surface propagation phenomenon, as for the plane surface case, but also involves a bulk cnnd phenomenon caused by diffractions of the ultrasonic wave field on the surface irregularities.

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GAUS | Ultrasound

Ultrasonic thickness measurements of solidification front inside metallurgical reactor Partenaire industriel: The diffraction phenomena evaluation by amplitude models using a ray approach allows to provide a complete simulation time of flight, wave front and amplitude of the head wave for numerous kinds of surface irregularity. Demonstration of various ultrasound techniques for structural Health Monitoring of military aerospace structures.

To overcome this limitation, two incremental methods involving a sum of spherical waves emitted by discretization points on the diffracting edge have been developed. Citation Audrey Kamta Djakou.

The developed UTD solutions were validated numerically and UTD for a wedge was implemented in CIVA ultraxons a 2D configuration incidence and uktrasons directions are in the plane perpendicular to the wedge edge. Characterization of guided wave propagation in aircraft structures Partenaire industriel: Different defects cmd studied: The current usage metrics is available hours after online publication and is updated daily on week days. Initial download of the metrics may take a while.


Theoretical and experimental validations of the developed simulation tool have been carried out and have proven successful. Advanced SHM technologies Partenaire industriel: Metrics Show article metrics. Standard Search Advanced Search. Les sujets de recherche incluent:. The aim of this thesis is to extend this ray model to account for specimen wedges diffraction. Developpement de modeles asymptotiques en controle non destructif CND par ultrasons: Close Go to Workspace.

Development a methodology for coating estimation on complex composite parts. Publication Year Publication Year. Reference Number Reference Number.

Javascript must be enabled for narrowing. These incremental models are not applied to the developed UTD wedge, this last model being ultrasosn infinite wedge and the diffraction problem is invariant along the edge wedgebut they will be useful when a GTD solution for the diffraction by a solid wedge will be developed in 3D configurations.

In addition to its non-uniformity, another drawback of the GTD methodology is its restricted application to canonical geometries half-plane, wedge, …as it mainly allows for the treatment of infinite edge diffraction.

First, UTD was developed for a simple canonical geometry, a half-plane, to show its feasibility and then for a complex canonical geometry, a wedge whose cndd are stress-free. Correlation-based imaging technique Partenaire industriel: