Correlation between Fatigue Crack Propagation and Low Cycle Fatigue Properties

Abstract

Fatigue crack propagation is treated as a succession of fatigue crack initiation events. The cyclic stress and strain experienced by each element ahead of the crack tip is computed by means of an elastic-plastic analysis of the crack tip region. The attendant cumulative fatigue damage is computed in terms of low cycle fatigue properties of the metal. This permits a correlation to be made between the fatigue crack propagation resistance of a metal and its resistance to fatigue as measured on smooth specimens. Fatigue crack propagation data for eight steels from Barsom's work are compared with predictions from the analysis using low cycle fatigue properties and values of rho* based on Gurland's study of the microstructural elements responsible for strengthening in steels.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1973
Accession Number
AD0766138

Entities

People

  • Jodean Morrow
  • Saurindranath Majumdar

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Applied Mechanics
  • Continuum Mechanics
  • Crack Propagation
  • Crack Tips
  • Cracks
  • Experimental Data
  • Fatigue Life
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Resistance
  • Strain Hardening
  • Stress Intensity Factors
  • Stresses
  • Tensile Strength
  • Yield Strength

Readers

  • Materials Science (Mechanical Engineering).
  • Regression Analysis.