Principles of Nondestructive Evaluation Shreekanth Mandayam Graduate / Senior Elective 0909-504-01/0909-413-01 Fall 1999 http://engineering.rowan.edu/~shreek/fall99/nde/

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

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

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

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

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

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

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

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

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)

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

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

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.

Ultrasound NDE Most Common Inspection Technique Inspection frequency Ultrasonic waves Inspection Inspection frequency 20 kHz - 100 MHz Acoustic wave velocity in Aluminum Longitudinal: 6.30 km/s Shear: 3.13 km/s

Microwave NDT HP-8753D Network Analyzer Microwave frequencies: Source HP-8753D Network Analyzer Horn Antenna Horn Antenna Measurement Instrumentation Microwave frequencies: 300 MHz - 1000 GHz

Magnetic Flux Leakage Specimens Magnetic Images

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

NDE Laboratory Room 201 Henry M. Rowan Hall