Fracture Mechanics Analysis of Centered and Offset Fastener Holes in Stiffened and Unstiffened Panels under Uniform Tension

Abstract

This report documents a finite-element analysis procedure for computation of Mode I and Mode II stress intensity factors associated with one or two sharp cracks emanating from a fastener hole in a panel under uniform tension. The fastener hole may be offset from the panel centerline, and one or both edges of the panel may be integrally stiffened. The formulation of a special assumed-stress hybrid element for the region near the fastener hole is presented. A detailed description of the programming covers the physical problem, modelling, program flow and options, input/output conventions, execution times, and limitations which must be observed. Results are presented for performance tests of the special element, and for some example analyses of cracked panels.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1976
Accession Number
ADA032034

Entities

People

  • George Stalk
  • Oscar Orringer

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Artificial Intelligence
  • Computations
  • Computer Programming
  • Crack Tips
  • Equations
  • Far Field
  • Fasteners
  • Finite Element Analysis
  • Fracture (Mechanics)
  • Geometry
  • Mechanics
  • Near Field
  • Performance Tests
  • Plastic Explosives
  • Stress Intensity Factors
  • Stresses

Readers

  • Computer Science.
  • Materials Science (Mechanical Engineering).
  • Structural Dynamics.