Fracture and Three Dimensional Stress Analyses of 7075 Aluminum Projectile Components Under Spin and Inertia Load

Abstract

A fracture case study of a high strength aluminum projectile component subjected to inertial and spin loading during launch from a cannon is presented. A three-dimensional finite element model was used to calculate the projectile stresses and to determine which of the several types of loading was the primary cause of failure. A design change to minimize spin loading resulted in a significantly reduced failure incidence. Mechanical and fracture mechanics tests of the aluminum were performed in order to determine material specifications which could prevent failures in the future. An energy-to-failure test similar to the Charpy test was found to be the most discriminating.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1989
Accession Number
ADA210986

Entities

People

  • B. A. Konrad
  • G. P. O'hara
  • John H. Underwood
  • M. A. Scavullo

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aluminum Alloys
  • Engineering
  • Failure Mode And Effect Analysis
  • Materials
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Projectile Components
  • Projectiles
  • Security
  • Specifications
  • Standards
  • Stress Analysis
  • Stresses
  • Tensile Stress
  • Three Dimensional
  • Toughness

Readers

  • Control Systems Engineering.
  • Materials Science (Mechanical Engineering).
  • Structural Health Monitoring of Composite Structures.