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Principles of Nondestructive Evaluation

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

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Principles of Nondestructive Evaluation

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

  2. Plan • Course introduction • 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 Display Result Signal / Image Recognition Input transducer Measurement transducer Signal / Image Processing

  5. Excitation Source Display Result Signal / Image Recognition Input transducer Measurement transducer Signal / Image Processing Technologies • Artificial Neural Nets • Pattern Recognition • Fuzzy Logic • Data Fusion • 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. 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 • Ultrasonic waves • Inspection • Inspection frequency • 20 kHz - 100 MHz • Acoustic wave velocity in Aluminum • Longitudinal: 6.30 km/s • Shear: 3.13 km/s

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

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