Wave Propagation in Solids

Lecturer:

Tutor:

Supervisor:

Department of Mechanics, Biomechanics and Mechatronics

Synopsis:

Propagation of acoustic waves, longitudinal and transversal bulk wave, propagation of waves in anisotropic media, surface waves, guided waves. Introduction to the signal processing, digitizing and signal quantification, stability and causality, Fourier transform, pulsed echo of the system, frequency representation of signals. Acoustic emissions as passive ultrasound technique, source localization, force representation of acoustic source, modal acoustic emission, application of AE on thin walled constructs. Ultrasound techniques, its applications to defectoscopy (NDT), scanning techniques, acoustic microscopy. Determination of material properties, elastic coefficients evaluation from experimentally obtained velocities of acoustic waves propagation, coherence between material structure and attenuation, frequently dependent attenuation and material dispersion. Non-contact techniques, laser excited ultrasound and detection of acoustic wave by the laser interferometry (laser ultrasound), air coupled ultrasound. Resonant ultrasound spectroscopy, measurement of elastic properties, evaluation of the attenuation, defectoscopy.

Requirements:

Basic knowledge of continuum mechanics, concretely:

Physical causes of elastic and plastic deformations,

Model of continuum,

Stress and strain tensors,

Index notation,

Deviatoric decomposition,

Hooke?s law,

Constitutive relations.

Syllabus of lectures:

Propagation of acoustic waves

Introduction to the signal processing

Acoustic emission

Basic experimental ultrasonic techniques

Determination of material properties

Non-contact techniques

Resonant ultrasound spectroscopy

Syllabus of tutorials:

Introduction to the theory of the propafation of acoustic waves in solids

Study Objective:

Study materials:

B. A. Auld. Acoustic fields and waves in solids, Vol. 1. John Wiley and Sons, New York, 1973.

D. S. Chandrasekharaiah and L. Debnath. Continuum Mechanics. Academic Press, Boston, 1994.

D. Royer and E. Dieulesaint. Elastic Waves in Solids I. Springer-Verlag, Berlin, 1996.

Note:

Time-table for winter semester 2011/2012:

Time-table is not available yet

Time-table for summer semester 2011/2012:

Time-table is not available yet

The course is a part of the following study plans: