Surface Cracks Emanating from Fastener Holes.

Abstract

The finite element-alternating method is used to determine stress intensity factors along the periphery of a part-elliptical crack emanating from a fastener hole in a finite-thickness plate. A sequence of iterations is performed between an analytic solution for an elliptical crack embedded in an infinite solid and a finite element solution for the uncracked plate with a fastener hole. The technique determines the stress field near the crack, the stress intensity factor and the crack opening displacements. Mode-one stress intensity factors around the crack front are presented for three classes of crack location relative to the hole and numerous crack shapes and sizes. Calculations are performed for cracks emanating from both loaded and unloaded fastener holes. Crack opening displacements for all cases are presented.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1976
Accession Number
ADA045349

Entities

People

  • Thomas Edward Kullgren

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Boundaries
  • Elastic Properties
  • Engineering
  • Equations
  • Finite Element Analysis
  • Fracture (Mechanics)
  • Geometry
  • Materials
  • Mechanical Engineering
  • Mechanics
  • Military Research
  • Stress Intensity Factors
  • Three Dimensional
  • Two Dimensional
  • United States

Fields of Study

  • Engineering

Readers

  • Structural Health Monitoring of Composite Structures.