Nondestructive Diagnostics

Garant předmětu:

Lecturer:

Tutor:

Supervisor:

Department of Materials

Synopsis:

The course is devoted to acquaintance with theoretical and practical grounding and applications of nondestructive testing (NDT), evaluation (NDE), and inspection (NDI, SHM) of materials and structures. Besides the standard NDT methods, the lectures also deal with the newest NDT/NDE procedures (acoustic emission, nonlinear ultrasonic spectroscopy and tomography, etc.). The education is completed by practical laboratory training in selected methods and also by excursions into industrial companies working on NDT/NDE.

Requirements:

General courses in physics and mathematics, solid state physics, theory of elasticity, basics of fracture mechanics, knowledge on physical properties of various materials (both metalllic and non-metallic, basics of informatics and electronics, mathematical methods of signal analysis (spectral analysis etc.).

Syllabus of lectures:

1. NDT/NDE/NDI - short specification and possibilities of nondestructive testing and diagnostic methods and their applications. Standardization, qualification, and certification in NDT.

2. Radiology (RT) - radiography, radiometry, tomography, neutronography; thermography. 3. Liquid penetrant and magnetic particle testing (PT, MT), eddy current and electro-dynamic methods (ET), leakage testing (LT).

4. Visual methods (VT), endoscopy, holography, vibro-acoustics, imaging and evaluation of material defects.

5. Ultrasonic methods (UT), ultrasonic imaging.

6. Ultrasonic thickness measurements, ultrasound velocity and attenuation. Ultrasonic measurement of elastic material properties.

7. Ultrasonic transducers and phased arrays, devices and their calibration. Determining of defect position, form, and orientation. Ultrasonic testing of welds, pipelines, and aerospace structures.

8. Nonlinear elastic wave spectroscopy (NEWS), acoustic time reversal mirrors, guided waves testing.

9. Acoustic Emission monitoring (AT), detection and features of AE signal.

10. Localization of AE sources (linear, planar, and 3D), artificial neural networks and AE source recognition.

11. Practical applications of AE testing, monitoring of pressure vessels, pipelines, nuclear power plants, and buildings. Structural health monitoring (SHM).

12. Non-standard NDT methods. Optical fibers with Fiber Bragg Gratings (FBG), comparative vacuum monitoring (CVM).

Syllabus of tutorials:

Basics of ultrasonic testing (measurements of material thickness , velocity and attenuation of ultrasonic waves in steel and plastics, defect detection in UT calibration body).

Linear location of acoustic emission source (Pen-Test), evaluation of AE signal parameters.

Study Objective:

Knowledge:

General information on physical principles and methods of nondestructive testing and evaluation of materials and structures. Guidelines on how to detect faults and imperfections in both metallic and non-metallic materials and structures, and monitor occurence and evolution of cracks and other damages in structures during their production and service. The main goals are general instructions on how to prevent structural failures and accidents, maintenance planning, and lifetime prediction.

Skills:

The course would provide students with a knowledge about material and structural diagnostics with regard to the kind of material, type of structure and its loading, and also considering the economical aspects. Student would be able to design „smart“ structures equipped with self-diagnostics.

Study materials:

Key references:

[1] Klyuev V.V., Zusman G.V. eds.:Nondestructive Testing and Diagnostics Hanbook. (RSNDTD, Moscow, Metrix Instruments Co., Houston, 2004).

Recommended references:

[1] Shull P.J., ed. : Nondestructive Evaluation - Theory, Techniques, and Applications. (Marcel Dekker, Inc., N.Y., Basel, 2002).

[2] Nondestructive Testing Handbook, Vol. I - IX. (The American Society for NDT, Columbus, USA).

[3] www.ndt.net/, www.cndt.cz/ , www.ndt-ed.org, www. asnt.org , www.dgzfp.de.

Media and tools:

Laboratory of NDT Department of the Institute of Thermomechanics AS CR (UT, AT, NEWS devices and sensors, ultrasonic scanner, mechanical testing equipment, computers with MATLAB programming).

International NDT Journals: NDT-Welding bulletin, NDT&E , Research in Nondestructive Evaluation, Materials Evaluation, Journal of Acoustic Emission.

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans: