Principles of Nondestructive Evaluation

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Principles of Nondestructive Evaluation

• Shreekanth Mandayam
• Graduate / Senior Elective
• 0909-504-01/0909-413-01
• Fall 1999
• http//engineering.rowan.edu/shreek/fall99/nde/

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Plan

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

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What is Nondestructive Testing?

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

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

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Issues
Excitation Source
Forward Problem
Inverse Problem
Received Signal / Image
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NDE - A Full Spectrum Technology
Materials Development
Design
NDE Technologies
Processing
Manufacturing
In-Service Monitoring
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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

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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

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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)

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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

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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

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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.
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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

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Microwave NDT
Microwave Source
HP-8753D Network Analyzer
Horn Antenna
Horn Antenna
Measurement Instrumentation
Microwave frequencies 300 MHz - 1000 GHz
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Magnetic Flux Leakage
Specimens
Magnetic Images
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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

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NDE Laboratory

• Room 201
• Henry M. Rowan Hall