The Growth of Short Fatigue Cracks in an Aluminium Alloy

Abstract

Fatigue tests have been carried out to establish the effects of various constant amplitude and standardised variable amplitude loading sequences on the growth of short and long cracks in 2024-T3 aluminium alloy. In most cases, the growth rates of short cracks were greater than those of long cracks for the same nominal stress intensity factor ranges, and short cracks grew at stress intensity factor ranges below the long crack threshold values. This Report describes and discusses the experimental crack growth results and compares them with predictions based on the FASTRAN crack closure model of Newman. The experimental work reported includes that which represented the United Kingdom contribution to the core programme of the AGARD cooperative programme on short crack growth behaviour.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1992
Accession Number
ADA262064

Entities

People

  • R. Cook

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Airframes
  • Aluminum Alloys
  • Aspect Ratio
  • Crack Propagation
  • Crack Tips
  • Experimental Data
  • Fatigue Tests (Mechanics)
  • Finite Element Analysis
  • Fracture (Mechanics)
  • Grain Boundaries
  • Mechanical Properties
  • Mechanics
  • Residual Stress
  • Stress Intensity Factors
  • Test Methods

Fields of Study

  • Materials science

Readers

  • European Security and Defence Policy (ESDP).
  • Materials Science (Mechanical Engineering).