Fracture Properties of 350 WT Steel at Very High Loading Rates

Abstract

Fracture studies were conducted on 12.7 mm thick compact tension specimens of 350 WT steel at very high loading rates. The equipment used in the studies consisted of a specially designed Split Hopkinson Bar system capable of delivering sufficient energy to fracture the specimens on impact. Projectile speeds in the Split Hopkinson Bar were in excess of 50m/s. .Following fracture, the extent of the shear lip as well as the stretch zone width which occurs before crack extension, were measured in all the specimens tested. Test temperatures ranged from -45 to 15C. It was found that above OC, fracture is ductile with a shear lip extending across the fracture surface for the specimens with no fatigue precrack. For those with a fatigue precrack, the shear lips are smaller.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1999
Accession Number
AD1004982

Entities

People

  • J. R. Matthews
  • M. N. Bassim

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Buildings And Structures
  • Canada
  • Continents
  • Control Systems
  • Fire Control Systems
  • Geographic Regions
  • Laboratory Equipment
  • Manitoba
  • North America
  • Nova Scotia
  • Projectiles
  • Research Facilities
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  • Weapons Support Equipment

Fields of Study

  • Materials science

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  • Materials Science (Mechanical Engineering).
  • Mathematics or Statistics