Axial Crack Propagation and Arrest in Pressurized Fuselage

Abstract

The rapid crack propagation, crack curving and arrest mechanisms associated with a pressurized, thin-walled ductile steel tubes are used to develop a model of axial rupture of an aircraft fuselage. This model is used to replicate axial crack propagation along a line of multi-site damage (MSD) and crack curving and arrest near a strap of an idealized fuselage. Static linear elastic fracture mechanics (LEFM) has been used to predict a monotonically increasing stress intensity factor with increasing crack length of an axial crack in a pressurized pipe (1,2) as well as to model dynamic crack branching in a pressurized steel pipe (3). Plasticity effect has also been incorporated to this LEFM analysis using semi-empirical adjustments (4,5), or by kinematic modelling of the yielded pipe (6). Many of these analyses, however, do not consider the dynamic effects generated by the propagating axial crack as well as the influence of the large plastic deformation of the crack flaps.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1990
Accession Number
ADA221329

Entities

People

  • Albert S. Kobayashi
  • Makoto Kosai

Organizations

  • University of Washington

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Crack Propagation
  • Crack Tips
  • Cracks
  • Engineering
  • Fracture (Mechanics)
  • Intensity
  • Materials
  • Mechanical Engineering
  • Mechanics
  • Military Research
  • Plastic Deformation
  • Pressure Vessels
  • Rupture
  • Straps
  • Stress Intensity Factors
  • Stresses

Fields of Study

  • Engineering

Readers

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