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. Among the various NDT methods, ultrasonic techniques also provide a volumic inspection of the entire structure with a relatively easy implementation and is not binding in terms of safety and regulation. 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.
Depending on the nature of the damage crack isolation or network defects, such as in the case of a thermal cracking, crack open or partially closed and the control technique used, more or less complex phenomena are involved: Interaction between a crack and a network of cracks, near partial contact between the faces of the crack under the effect of stress These phenomena may limit the capacity of sizing, or even detection of cracks.
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. Different defects were studied: mechanical fatigue crack inspected by ultrasonic stress or unstressed, thermal fatigue crack, with or without a network of small cracks. The performance of these different techniques are evaluated experimentally and compared with simulations. Methodes avancees en controle non destructif ultrasonore pour la detection et le dimensionnement de fissures de fatigue.
Country of publication. Descriptors DEI.
Descriptors DEC. Publication Year Publication Year. Language Language.
- Ultrasonic Testing with CIVA;
- 4th International Symposium on Laser Ultrasonics - June 28-July 2, 2015.
- Browse more videos?
Reference Number Reference Number. Close Proceed. Export to Mendeley. Esam M. An Engineer's Guide to Pipe Joints. Blitz G. Don E. Bray Roderic K. Electromagnetic Nondestructive Evaluation No.
Xavier P. Acoustic Emission Testing. Practical Non-Destructive Testing.
Ultrasonic testing - Wikipedia
Raj T. Jayakumar M. Experimental Techniques in Materials and Mechanics. Atlas of Material Damage. Ultrasonic Waves in Solid Media.
Huebschen Altpeter Tschuncky. He Gao Sophian. Jean Paul Balayssac. ASM Handbook Vol. Nondestructive Testing.
- Changing Conceptions of National Biography: The Oxford DNB in Historical Perspective.
- Imperial Chinese Armies (2).
- Sandia National Laboratories: Nondestructive Testing: Sandia looks inside composites?
- The Use and Abuse of Sacred Places in Late Medieval Towns?
- The Struggle over the Soul of Economics?
- WOMENS WORLDS: The McGraw-Hill Anthology of Womens Writing in English Across the Globe;
SAE International. ASM HB v. Howard Kuhn Diana Medlin.