rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Bending of threaded and unthreaded tungsten rods under oblique impact
  name:
    name part: Raftenberg , Martin N.
    role:
      role term: creator
  name:
    name part: Bjerke, Todd W.
  name:
    name part: U.S. Army Research Laboratory
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: dcu
    date issued: 2005
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: electronic
    form: remote
    extent: 1 online resource (vi, 45 pages) : illustrations
  abstract: We employed ballistic experiments and finite element (FE) analysis to explore the extent to which. and the mechanism by which, the threading on a tungsten heavy alloy rod increases its susceptibility to break up under conditions of oblique impact. In the laboratory. small-scale rods with and without threads were launched into thin rolled homogeneous armor plates at 1300 m/s and 60 degrees' obliquity. Fracture near the nose of the rod occurred more consistently with the threaded rods. LS- DYNA(Trademark) was used to analyze plane strain elastic impact of threaded and unthreaded rods striking a rigid surface at 10 m/s and 60 degrees' obliquity. These calculations revealed a greater degree of bending in a threaded rod than in an unthreaded rod of the same diameter. The maximum principal stress, which has been used as a criterion for brittle tensile fracture, also attained larger values in the threaded than in the unthreaded rod. With the aid of static FE analyses of cantilevered, point-loaded, threaded and unthreaded rods, the results of which could be compared with an analytical result from plate theory, we associated the increased bending with a decrease in effective rod thickness.
  note: by Martin N. Raftenberg and Todd W. Bjerke.
  note: Title from title screen (viewed May 28, 2010).
  note: "August 2005."
  note: The original document contains color images.
  note: Electronic resource.
  note: APPROVED FOR PUBLIC RELEASE.
  note: Final; October 2004 to August 2005.
  note: 1L162618AH80.
  note: Includes bibliographical references (page 29).
  subject:
    topic: Tungsten
    topic: Metallurgy
  subject:
    topic: Tungsten alloys
  subject:
    topic: Weapons systems
  subject:
    topic: Metallurgy and Metallography
  subject:
    topic: Numerical Mathematics
  subject:
    topic: Ballistics
  subject:
    topic: Brittleness
  subject:
    topic: Ballistics
  subject:
    topic: Finite element analysis
  subject:
    topic: Tensile properties
  subject:
    topic: Screw threads
  subject:
    topic: Tungsten
  subject:
    topic: Elastic properties
  subject:
    topic: Fracture(mechanics)
  subject:
    topic: BENDING
  subject:
    topic: KE ROD
  subject:
    topic: OBLIQUE IMPACT
  subject:
    topic: THREADING
  subject:
    topic: TUNGSTEN HEAVY ALLOY
  classification: D 101.133:3578
  related item:
    title info:
      title: ARL-TR (Aberdeen Proving Ground, Md.) ; 3578
  identifier: https://purl.fdlp.gov/GPO/LPS122567
  access condition: APPROVED FOR PUBLIC RELEASE.
  record info:
    record content source: DTICE
    record creation date: 080512
    record change date: 20211202193646.0
    record identifier: in00002577254