INVESTIGATION OF THE FRACTURE TOUGHNESS OF THICK PLATE METALLIC MATERIALS ASSIGNMENT 86 105 PHASE I,

Abstract

The effect of notched-bend specimen thickness in determining the plane-strain fracture toughness, and the nominal notch-bend strength, of aluminum 7079-T6 alloy was studied. Particular attention was given to the ability of rectangular beams to predict the results for square beams of equal beam depth. It is concluded /hat in the absence of pop-in, a specimen thickness of one-half the beam depth or greater is required. If pop-in is discernable and the pop-in stress is used, a thickness of onequarter the depth or greater is required. This information is significant in evaluating the fracture toughness of thick sections when only plate of lesser thickness is available. A future phase of the investigation will determine the ability of rectangular notched beams to establish the size effect in a material exhibiting a transition from quasi-ductile to frangible behavior at sizes greater than the available plate thickness. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 09, 1964
Accession Number
AD0449664

Entities

People

  • A. J. Skalican

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aluminum
  • Frangible
  • Materials
  • Mechanical Properties
  • Physical Properties
  • Thickness
  • Toughness
  • Transitions

Readers

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