Non Destructive Control

Recommended Prerequisites

Mathematical tools acquired in the curricular units of Math and Physics.  

Teaching Methods

The classes operate in two distinct modes: theoretical/ practical classes with students concentrated on a single class and laboratory classes, where the students are divided into groups.

The theoretical evaluation is performed by a final exam. The evaluation of the Laboratory component requires the presence of all students in 75% of all classes. Also the students will develop a fieldwork after those two types of classes.  

Learning Outcomes

Various subjects are studied for practical application important for the future electrical engineer in automation and in medicine branches. To provide skills for the autonomous development of nondestructive systems. Discussion of fundamental aspects related to the NDT in general and the use of ultrasound in particular. Development of techniques associated with the most common transducers and ways to improve characteristics. Understand the visualization techniques by ultrasound for the different application fields

Work Placement(s)

No

Syllabus

Basic concepts of nondestructive testing. Application Fields. Advantages and disadvantages. Understanding ultrasound. Concept of piezoelectricity. Materials used in the generation of ultrasounds. Fields of application. Attenuation and calculation methods. Selection of probes: Choice of the materials and construction aspects. Immersion and contact coupling. Single and double probes. Angled and Focused Probes. Excitation circuits. Physical quantities associated with ultrasounds: Introduction to the displacement, strain, pressure, and vibration velocity and displacement concepts. Wave equation. Acoustic impedance. Mechanical backing and matching. Characterization of transducers: Introduction to the near field and far field concept. Radiation pattern. Transducer array. Visualization techniques by ultrasound: A-scan, B-scan and C-scan. Application Fields. Ultrasonic Interferometry. Ultrasonic spectroscopy.

Head Lecturer(s)

Mário João Simões Ferreira dos Santos

Assessment Methods

Assessment
Exam: 30.0%
Laboratory work or Field work: 70.0%

Bibliography

Krautkramer, J.; Krautkramer, H. Ultrasonic Testing of Materials, 4th Edition (1990), Springer

Szabo, T.L. Diagnostic Ultrasound Imaging (2004), Elsevier