A Review of Nonlinear Fracture Mechanics Relative to Fatigue

Abstract

This report reviews currently available parameters, methodology, and data that support further developments in elastic-plastic fracture mechanics (EPFM) technology for modeling fatigue crack growth rate (FCGR) behavior. In general, it can be stated that linearly elastic fracture mechanics (LEFM) parameters can be used to model FCGR behavior except when the zone of cyclic plasticity accompanying the crack process is large with respect to crack length and other structural length parameters. The literature provides two types of EPFM parameters which are available for modeling FCGR behavior when the limitations of LEFM are exceeded: one type is based on the characterization of the intensity of the crack tip stress-strain field, the other is based on the determination of a specific mechanical parameter which is evaluated at a point close to the crack tip. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 1979
Accession Number
ADA086671

Entities

People

  • H. C. Rhee
  • J. P. Gallagher
  • Tusit Weerasooriya

Organizations

  • University of Dayton

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Aluminum Alloys
  • Continuum Mechanics
  • Crack Tips
  • Elastic Materials
  • Finite Element Analysis
  • Fracture (Mechanics)
  • Geometry
  • High Temperature
  • J Integrals
  • Materials
  • Materials Laboratories
  • Mechanics
  • Numerical Analysis
  • Plastic Deformation
  • Strain Hardening
  • Stress Intensity Factors

Fields of Study

  • Engineering

Readers

  • Materials Science (Mechanical Engineering).