Dynamic Fracture in 6061-T6 Aluminum

Abstract

Gas gun impact experiments were performed on five thicknesses of 6061-T6 aluminum targets to determine the incipient spall threshold. Data obtained were compared with previous data for the same material obtained by General Motors and other laboratories. Results indicated that batch-to-batch variations in properties of a commercially 'standard' material may cause up to 15 percent differences in spall thresholds for short duration (<0.1 microsecond) shock loads. Four mathematical models of dynamic fracture were evaluated with the spall data obtained. The Hole-Growth model developed by Stanford Research Institute under contract to the Air Force Weapons Laboratory proved superior to the other models considered. This superiority was manifested in the ease of interpretation of the calculated damage levels and the physical significance of the calculations.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1971
Accession Number
AD0881534

Entities

People

  • James R. Kreer

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Amplitude
  • Computers
  • Data Analysis
  • Equations
  • Experimental Data
  • Gas Guns
  • Guns
  • Inclusions
  • Materials
  • Mathematical Models
  • Shape
  • Standards
  • Stress Waves
  • Tensile Stress
  • Timing Devices
  • X Rays

Fields of Study

  • Physics

Readers

  • Explosive Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Theoretical Analysis.