Fatigue Failure Predictions for Complicated Stress-Strain Histories

Abstract

A cumulative damage procedure is developed to predict the fatigue failure of engineering metals subjected to complicated stress-strain histories. Histories with plastic strainings and cycles not completely reversed in stress are considered. The relationship between stress-strain behavior and fatigue life is investigated for unnotched axially loaded specimens for which the stresses and strains can be measured for the duration of all tests. Since either the stress history or the strain history was known before each test was conducted, the other could be estimated and a life prediction made. A general cumulative damage procedure is used to make life predictions for a wide variety of complicated history tests on 2024-T4 aluminum.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1971
Accession Number
AD0736583

Entities

People

  • N. E. Dowling

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Computer Simulations
  • Crack Propagation
  • Fatigue Tests (Mechanics)
  • Frequency
  • Hardening
  • Materials
  • Materials Testing
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Residual Stress
  • Stress Concentration
  • Stress Strain Relations
  • Stress Tests
  • Stresses
  • Tensile Properties
  • Tensile Strength

Readers

  • Materials Science (Mechanical Engineering).
  • Mechanical Engineering/Mechanics of Materials.
  • Statistical inference.