ME495: Ultrasonic Methods of Materials Characterization – Spring 2004

---

Instructor:

Prof. Sridhar Krishnaswamy

323 Catalysis Building

Tel: 1-4006

email: s-krishnaswamy@nwu.edu

Lecture Hours:

Tues, Thurs: 1.00-2.00 pm

---

Announcements:

Problem sets due June 7, 2004

Project reports due June 11, 2004

---

Course Content & Lecture Notes

• These links will be activated as we cover the various topics.
• These notes are for the personal use of ME_495 students only. Usual copyright stipulations apply.
• Use Acrobat Reader 5.0 or better to view on screen or to print out the pdf files.

Wave Propagation in Anisotropic Solids

Part 1:

Elastodynamics
Plane waves in infinite media:
- Christoffel tensor, slowness curves
- Isotropic materials
- Anisotropic materials
Matlab codes: slowness.m, christoffel.m

Part 2:

- Poynting vector
- Energy / Group velocity

Part 3:

Rayleigh Waves:
- Isotropic Materials
- Anisotropic Materials
Matlab codes: rayleigh.m

Part 4:

Lamb Waves in Isotropic Plates

Optical Measurement of Ultrasound

Part 1:

Electrodynamics
Optical Interferometry
  - Two-beam interference
  - SNR considerations

Part 2:

  - Reference beam interferometers
  - Time-delay interferometers

Part 3:

  - Fabry-Perot interferometer

Part 4:

  - Adaptive holographic interferometers

Optical Generation of Ultrasound

- EM-absorption in isotropic media

Lecture Presentations:

Introduction

Elastodynamics – bulk waves

Elastodynamics – attenuation etc

Elastodynamics – Rayleigh waves

Elastodynamics – Guided waves

Acoustic Microscopy

Photoacoustic Generation

Optical Detection

Ultrasonic Force Microscopy

Problem Set 1
Problem Set 2
Problem Set 3 (you need not hand this in)