A Special Crack Tip Element for Three-Dimensional Crack Problems.

Abstract

This paper develops a finite element method for determining the stress intensity factors along the edge of a crack in an arbitrary three-dimensional body. A special element is placed around the crack front and in each special element the stresses and displacements are derived using the asymptotic nature of the stress and displacement fields near a crack tip. The method is based on the authors' previous technique for evaluating the stress intensity factors in cracked sheets, and coincides with this method in the case of a through crack in a thin sheet. As illustrative examples the problems of a semicircular surface flaw and an internal penny shaped crack are considered. In each case the computed values of the stress intensity factors are in excellent agreement with known analytical results, (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1978
Accession Number
ADA078634

Entities

People

  • Rhys Jones
  • Richard J. Callinan

Tags

Communities of Interest

  • Air Platforms
  • Cyber
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Australia
  • Boundaries
  • Corporations
  • Crack Tips
  • Department Of Defense
  • Displacement
  • Engineering
  • Equations
  • Finite Element Analysis
  • Geometry
  • Materials
  • Mechanical Engineering
  • Mechanics
  • Stress Intensity Factors
  • Stresses
  • Three Dimensional

Fields of Study

  • Engineering

Readers

  • Structural Dynamics.
  • Structural Health Monitoring of Composite Structures.