Evaluation of a Hand-Held Frictional Strain Gauge.

Abstract

The Aeronautical Research Laboratories (ARL) Structures Division has acquired a commercially available instrument for obtaining strain values from a cyclically loaded flat surface. This strain gauge has the advantage over a conventional bonded gauge in that it can be applied with little or no preparation time. This advantage makes it useful in conjunction with the SPATE 8000 thermal stress pattern imager which is usually calibrated by obtaining a cyclic strain reading from within the field of view of the article under test. Use of a conventional bonded gauge on the article necessarily obscures some area within the field of view. Experiments were performed to show that an electrical signal linearly dependent on the strain amplitude could be obtained. The accuracy and repeatability of this signal was checked for different frequencies and effects of surface cleanliness. Keywords: Canada. (jes)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1987
Accession Number
ADA198125

Entities

People

  • J. G. Sparrow
  • M. G. Stimson

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Aluminum
  • Aluminum Alloys
  • Calibration
  • Control Knobs
  • Crystal Oscillators
  • Equations
  • Frequency
  • Load Cells
  • Materials
  • Materials Testing
  • Measurement
  • Spectrum Analyzers
  • Strain Gages
  • Test And Evaluation
  • Transfer Functions

Readers

  • Geodesy
  • Radar Systems Engineering.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).