The Effects of Fatigue Loading Frequency on Fatigue Life of HIgh- Strength Pressure Vessel Steels

Abstract

Bend specimens of high-strength pressure vessel steel were tested in bending fatigue to failure at 1.5, 15, 30, arid 75 Hz fatigue loading frequencies. In the 1.5 to 15 Hz range, there was no discernible difference in the frequency effect on fatigue life. However, in the 30 to 75 Hz range, there was a definite increase in fatigue life compared to the lower range of frequency. The average increase in fatigue over the stress range was a factor of 10 greater than the life at the lower frequency range. This factor increased at lower stresses decreased at higher stresses, but even at the highest stresses tested, the increase was significant, about 5 to 1. This indicates that the frequency effect is more effective at high-cycle fatigue and diminishes with low-cycle fatigue. A model for fatigue life deterioration caused by superimposition of loads under different frequencies is introduced. Fatigue life, High strength, Pressure vessels, Steel, Frequency

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1994
Accession Number
ADA285301

Entities

People

  • Robert R. Fujczak

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Engineering
  • Equations
  • Fatigue Life
  • Frequency
  • Information Security
  • Materials
  • Materials Science
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Pressure Vessels
  • Schematic Diagrams
  • Security
  • Tensile Strength

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  • Materials Science (Mechanical Engineering).
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