Flexural Fatigue Behavior of ARALL (Tradename) Laminates

Abstract

Axial fatigue testing has shown that ARALL laminates possess outstanding fatigue resistance compared to monolithic aluminum alloys in tension-dominated cyclic loads. This work examines the fatigue behavior of 3/2 and 5/4 ply ARRALL-4 in pure flexure (R=-1). The effect of salt-fog exposure on fatigue response was also investigated. Results indicate that, in general, failure occurs in three stages: cracking of the outer aluminum surfaces, delamination at the interfaces between fiber-rich and resin-rich regions, and fiber failure. The flexural fatigue resistance of ARALL-4 was found to be excellent; compressive stresses did not contribute significantly to failure of the laminates.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1990
Accession Number
ADA233451

Entities

People

  • Jeffrey Cook
  • Mary E. Donnellan

Organizations

  • Naval Air Warfare Center Warminster

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Aluminum Alloys
  • Aramid Fibers
  • Bending Stress
  • Composite Materials
  • Engineering
  • Failure Mode And Effect Analysis
  • Fatigue Tests (Mechanics)
  • Laminates
  • Materials
  • Materials Science
  • Materials Testing
  • Naval Air Stations
  • Naval Aviation
  • Residuals
  • Stress Analysis
  • Test Equipment

Fields of Study

  • Materials science

Readers

  • Reinforced Composite Materials
  • Structural Health Monitoring of Composite Structures.