1. Principles of Nondestructive Evaluation
Shreekanth Mandayam
Graduate / Senior Elective /
Fall 1999

2. Plan Course introduction Course organization & logistics
What can I get from this course?
Course organization & logistics
Class projects
NDE lab

3. What is Nondestructive Testing?
Nondestructive Testing (NDT) refers to technology that allows a component to be inspected for serviceability, without impairing its usefulness

4. Principle Excitation Source Signal / Image Recognition Display Result
Input transducer
Measurement
transducer
Signal / Image
Processing

5. Technologies Artificial Neural Nets Pattern Recognition Fuzzy Logic
Data Fusion
Excitation
Source
Signal / Image
Processing
Recognition
Display
Result
Input transducer
Measurement
transducer
Hardware -
Probe design
Instrumentation
Control Systems
Communications
Electromagnetics /
mechanics
Numerical Modeling
Supercomputing
Software Development
GUIs
Computer Graphics
Virtual Reality
Digital Filters
Morphology
Data Compression
Wavelets

6. Received Signal / Image
Issues
Excitation
Source
Forward
Problem
Inverse
Problem
Received Signal / Image

7. NDE - A Full Spectrum Technology
Materials
Development
Design
NDE
Technologies
Processing
Manufacturing
In-Service Monitoring

8. Intelligent Synthesis Environment
NASA concept for engineering design of aerospace systems in the 21st century
Technology benefit estimator
NDE simulation in cost estimating
NDE in simulated manufacturing
NDE in repair simulation

9. Course Organization & Logistics
Objective: At the conclusion of the this course, the student will have written a journal-quality technical paper based on research conducted during the course

10. Class Projects
1. Ultrasound NDE: Neural nets for signal interpretation
2. Ultrasound NDE: Invariant signal recognition
3. Eddy current NDE: Simulating eddy current inspection of VLSI chips (proposal to NSF)

11. Class Projects
4. Eddy current NDE: Design and develop an eddy current instrument (measure amplitude and phase of voltage using commercial eddy current probes)
5. Microwave NDE: System set up and experimentation for detecting frayed insulation in aircraft wiring

12. Class Projects
6. Thermal NDE: Set up system to perform thermal imaging
7. Parallel Processing & Monte Carlo Modeling: Develop software for solving NDE forward problems using Monte Carlo techniques
8. Magnetic Flux Leakage NDE: Neural networks for invariant recognition

13. Class Projects 9.--- Student specified projects: Check with instructor
Please come prepared with your project selection for the next class meeting (Sep 30). After discussion, you will be assigned to a project.

14. Ultrasound NDE Most Common Inspection Technique Inspection frequency
Ultrasonic waves
Inspection
Inspection frequency
20 kHz MHz
Acoustic wave velocity in Aluminum
Longitudinal: 6.30 km/s
Shear: km/s

15. Microwave NDT HP-8753D Network Analyzer Microwave frequencies:
Source
HP-8753D
Network
Analyzer
Horn Antenna
Horn Antenna
Measurement
Instrumentation
Microwave frequencies:
300 MHz GHz

16. Magnetic Flux Leakage
Specimens
Magnetic
Images

17. Key “Players” in NDE NASA - Langley Research Center
Johns Hopkins Center for NDE
Iowa State University Center for NDE
Georgia Tech Civil Engineering Dept.
Battelle
Southwest Research Institute (SwRI)
Timken
Electric Power Research Institute EPRI)
Boeing
British Gas
Rosen Gmbh
Eletricite De France (EDF)
Pipetronix

18. NDE Laboratory
Room 201
Henry M. Rowan Hall