Acousto-Elastic Fastener Preload Indicator

Abstract

This report describes the assembly, calibration, and testing of an acousto-elastic fastener preload indicator that has been demonstrated to preload fasteners with better than 5% accuracy within the elastic range. The system is computer automated and includes a calibration procedure for checking cutoff accuracy. The new capability afforded by this computer-controlled acousto- elastic torque wrench improves state-of-the-art capabilities by nearly an order of magnitude in accuracy for setting preloads and can be used on flaw-free fasteners of the flat-head type.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1978
Accession Number
ADB038409

Entities

People

  • J. C. Couchman

Organizations

  • General Dynamics

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Computer Programs
  • Control Systems
  • Corrosion Resistant Steels
  • Failure Mode And Effect Analysis
  • Manufacturing
  • Materials
  • Measurement
  • Modulus Of Elasticity
  • Molecular Orbital Theory
  • Plastic Explosives
  • Regression Analysis
  • Strain Gages
  • Test And Evaluation
  • Three Dimensional
  • Travel Time

Fields of Study

  • Physics

Readers

  • Electrical Engineering
  • Geodesy
  • Robotics and Automation.