FRACTURE CHARACTERISTICS OF SEVERAL HIGH STRENGTH ALUMINUM ALLOYS USING VARIABLE NOTCH ROOT RADII,

Abstract

A relationship between the stress concentration factor and the fracture toughness parameter was examined for the case of an elliptical hole in an infinite solid. Edge-notched specimens from three high-strength aluminum alloys were tensile loaded to failure. The resulting data from these tests were analyzed, using this relationship. It was indicated that the predicted proportionality between the fracture toughness parameter and the square root of the notch root radius does exist. Further examination of the relationship showed that the fracture occurs at a fixed state of strain within a plastic zone having a size proportional to the original root radius. A departure, however, from the predicted behavior was evident with the introduction of plane strain components at the notch root. This is also discussed. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1964
Accession Number
AD0452318

Entities

People

  • Joseph H. Mulherin

Organizations

  • Frankford Arsenal

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Mechanical Properties
  • Physical Properties
  • Square Roots
  • Stress Concentration
  • Stresses
  • Toughness

Readers

  • Approximation Theory.
  • Mechanical Engineering/Mechanics of Materials.
  • Structural Health Monitoring of Composite Structures.