Fatigue Crack Closure Behavior: A Comparative Study.

Abstract

Fatigue crack closure behavior in 2024-T3 aluminum alloy was investigated using a laser interferometry method developed in this investigation and an 'Elber' type displacement gage. The crack closure results using the two measurement methods are compared for constant amplitude loading. The displacement gage was also used to measure the crack closure behavior following selected overload/underload sequences. These results are compared with an inverse technique. The measurement methods and equipment are described and the crack closure results are presented. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1976
Accession Number
ADA031124

Entities

People

  • B. M. Hillberry
  • J. E. Rueping

Organizations

  • Purdue University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Aluminum Alloys
  • Crack Propagation
  • Crack Tips
  • Data Reduction
  • Detection
  • Detectors
  • Equations
  • Geometry
  • Laser Beams
  • Lasers
  • Load Cells
  • Materials
  • Measurement
  • Mechanics
  • Steady State
  • Strain Gages

Readers

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

Technology Areas

  • Directed Energy