A FLEXURAL FATIGUE MACHINE FOR HIGH-TEMPERATURE OPERATION AT RESONANCE IN VACUUM.

Abstract

A resonance type reversed-bending, high-temperature fatigue machine for operation at constant bending amplitude in vacuum has been developed. The vibration frequency is maintained at resonance by means of a feedback circuit employing a capacitance pickup. Another circuit maintains a constant amplitude of vibration. As fatigue cracks are developed, the resonant frequency is reduced. Curves of resonant frequency versus time at 800C for materials of high damping, such as Type 316 stainless steel, and for materials of low damping, such as Inconel X, illustrate the development of fatigue damage. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 11, 1965
Accession Number
AD0617915

Entities

People

  • H. H. Smith
  • M. R. Achter
  • R. J. Riley
  • R. L. Stegman

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Amplitude
  • Capacitance
  • Feedback
  • Frequency
  • Frequency Shift
  • High Temperature
  • Materials
  • Mechanical Waves
  • Motion
  • Resonance
  • Resonant Frequency
  • Stainless Steel
  • Steel
  • Vibration
  • Waves

Fields of Study

  • Physics

Readers

  • Electronics Engineering
  • Materials Science and Engineering.
  • Structural Dynamics.