Accession Number:

ADA210986

Title:

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

Descriptive Note:

Final technical rept.

Corporate Author:

ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS

Report Date:

1989-06-01

Pagination or Media Count:

27.0

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.

Subject Categories:

  • Properties of Metals and Alloys
  • Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE