A Cumulative Damage Theory of Fatigue Failure

Abstract

A rational phenomenological theory of fatigue lifetime prediction under arbitrary variation of cycle amplitude is presented. The theory is based on the concept of damage curve families and on an equivalent loading postulate which defines specimens that have suffered identical damage under different loading programs. Lifetime analysis has been performed for various cases of piecewise constant and continuous variation of cycle amplitude. For continuous variation, the method requires numerical integration of nonlinear first order differential equations which have been established in this work.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1977
Accession Number
ADA041984

Entities

People

  • A. Rotom
  • Z. Hashin

Organizations

  • Tel Aviv University

Tags

DTIC Thesaurus Topics

  • Air Force
  • Amplitude
  • Curve Fitting
  • Cyclic Loads
  • Differential Equations
  • Discontinuities
  • Equations
  • Failure Mode And Effect Analysis
  • Materials
  • Mechanics
  • Nonlinear Differential Equations
  • Numerical Integration
  • Residuals
  • Runge Kutta Method
  • Scientific Research
  • Static Tests

Fields of Study

  • Engineering

Readers

  • Calculus or Mathematical Analysis
  • Materials Science (Mechanical Engineering).