Eddy Current Benchmarking Experiments for Model Validation at AFRL

Abstract

To support an effort to estimate characteristics of surface-connected damage (i.e., cracks) in aerospace and propulsion structures, a computer-controlled scanning capability that acquires experimental eddy current data was developed based on an Agilent 4294A Impedance Analyzer. This instrument is being used to assess performance of different computational electromagnetic codes in terms of determining how well they predict the complex response from simulated flaws in conducting plates. The particular benchmark problem of interest in this paper measures the real and imaginary impedance due to Electrical-Discharge Machined (EDM) notches in aluminum plates that are approximately 13 mm thick. These EDM notches are 5mm deep and have the same surface length and width. A range of notches have been generated for this study, which includes vertically oriented notches and angled notches of 10, 20 and 30 degrees relative to the surface normal.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2011
Accession Number
ADA553269

Entities

People

  • Jeremy S. Knopp
  • Mark P. Blodgett
  • Ryan D. Mooers

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Air Force Facilities
  • Air Force Research Laboratories
  • Aluminum
  • Eddy Currents
  • Electricity
  • Elements
  • Experimental Data
  • Impedance
  • Measuring Instruments
  • Military Research
  • Simulations
  • Test And Evaluation
  • Transfer Functions
  • United States
  • Validation

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Materials Science (Mechanical Engineering).

Technology Areas

  • Space
  • Space - Hall-Effect Thruster