ME557 – Experimental Stress Analysis II

Department of Mechanical Engineering

 
 

 

 

MicTech Lab

Contact

 

                                                                                               

Instructor: Wei-Chih Wang, Ph.D.                                                
Office: ME 117 (Phone: 206-543-2479)
Grading: 3 credits
Class Time: MW 10:30-11:20 AM (MEB 243)

       Th 2:30-5:20 PM (MEB 234)

 

Moiré Interferometry shows the deformation caused by partial drying of a human tooth section.  The contour interval is 0.417 µm/fringe (courtesy of Measurements Group)

Objectives

The main goal of this course is to introduce engineers to the characteristics of light that can be used to accomplish a variety of engineering tasks especially in mechanical analysis. At the end of the course, students should be familiar with the range of possible applications for optics in mechanical measurement, and have a sense of how to evaluate the potential of optical methods vs. non-optical methods for any task.

 

The course involves lectures and laboratory work. The course is focused on the study of actual mechanical behavior of engineering materials through optical experimental methods. The theoretical background and technique for testing are extensively discussed. The lab work involves several major projects as well as various testing demonstrations. Most of the projects involve analysis, instrumentation, theoretical prediction, etc.  

 

Topics

Review of Geometric Optics and Electromagnetic wave Theory

Introduction to Light sources and photodetectors

Geometric Moiré: In-plane displacement measurement

Geometric Moiré: out of plane displacement measurement

Moiré Interferometry: Interference and Diffraction, Grating fabrication

Moiré Interferometry: Holographic and Laser Speckle Interferometry

Photoelasticity: theory, techniques and

Introduction to fiber optic and waveguide delivery and detection

 

Audiences

This course is for persons interested in experimental mechanics, physics, stress analysis, deformation analysis, motion measurement, engineering design, structural testing, metrology, nondestructive inspection, and similar fields.   This course mainly serves students in mechanics, and civil, mechanical, and materials engineering. This course should also be of interest to those interested in validation of numerical models.

 

"Experimental evidence is the truth theory must mimic."

 

•Textbooks
- Optical Methods of Engineering Analysis, Gary Cloud, Cambridge
        University Press.
- Handbook on Experimental Mechanics, Albert S. Kobayashi, society of 
        experimental mechanics.
- Applied Electromagnetism, Liang Chi Shen, Weber&Schmidt Dubury
- Fundamentals of Photonics, B. Saleh, John Wiley& Sons.
- Optoelectronics and Photonics: Principles and Practices, S. O.  
        Kasap, Prentice Hall.
     - Fiber optic Sensors, E. Udd, John Wiley& Sons
     - Selected papers in optical sensors, optical MEMS devices and integrated 
       Optical devices.
 

 

Course Prerequisite(s)

·           Physics 123 or permission of instructor.

·           ME 354 (Mechanics of materials) or equivalent.

 

Lecture Notes and Assignmements

Week 3  Geometric Moiré: In-plane displacement measurement
Week 4  Geometric Moiré: out of plane displacement measurement
Week 5  Moire Interferometry: Interference and Diffraction, Grating fabrication
Week 6  Moiré Interferometry: Holographic and Laser Speckle Interferometry
Week 7  Photoelasticity
Week 8  Photoelasticity
Week 9  Fiberoptic and polymer waveguide sensors
Week 10 Final project presentation