The Resource Bending of threaded and unthreaded tungsten rods under oblique impact, by Martin N. Raftenberg and Todd W. Bjerke, (electronic resource)

Bending of threaded and unthreaded tungsten rods under oblique impact, by Martin N. Raftenberg and Todd W. Bjerke, (electronic resource)

Label
Bending of threaded and unthreaded tungsten rods under oblique impact
Title
Bending of threaded and unthreaded tungsten rods under oblique impact
Statement of responsibility
by Martin N. Raftenberg and Todd W. Bjerke
Creator
Contributor
Subject
Genre
Language
eng
Summary
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
Member of
Cataloging source
DTICE
http://library.link/vocab/creatorName
Raftenberg, Martin N.
Government publication
federal national government publication
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • dictionaries
  • bibliography
Period covered
October 2004 to August 2005.
http://library.link/vocab/relatedWorkOrContributorName
  • Bjerke, Todd W
  • U.S. Army Research Laboratory
Series statement
ARL-TR
Series volume
3578
http://library.link/vocab/subjectName
  • Tungsten
  • Tungsten alloys
  • Weapons systems
  • Metallurgy and Metallography
  • Numerical Mathematics
  • Ballistics
  • Brittleness
  • Ballistics
  • Finite element analysis
  • Tensile properties
  • Screw threads
  • Tungsten
  • Elastic properties
  • Fracture(mechanics)
Type of report
Final;
Label
Bending of threaded and unthreaded tungsten rods under oblique impact, by Martin N. Raftenberg and Todd W. Bjerke, (electronic resource)
Instantiates
Publication
Note
  • Title from title screen (viewed May 28, 2010)
  • "August 2005."
  • The original document contains color images
Bibliography note
Includes bibliographical references (page 29)
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Color
mixed
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
64440390
Dimensions
unknown
Extent
1 online resource (vi, 45 pages)
Form of item
electronic
Governing access note
APPROVED FOR PUBLIC RELEASE
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Other physical details
illustrations
Specific material designation
remote
System control number
(GPO)99298033
Label
Bending of threaded and unthreaded tungsten rods under oblique impact, by Martin N. Raftenberg and Todd W. Bjerke, (electronic resource)
Publication
Note
  • Title from title screen (viewed May 28, 2010)
  • "August 2005."
  • The original document contains color images
Bibliography note
Includes bibliographical references (page 29)
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Color
mixed
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
64440390
Dimensions
unknown
Extent
1 online resource (vi, 45 pages)
Form of item
electronic
Governing access note
APPROVED FOR PUBLIC RELEASE
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Other physical details
illustrations
Specific material designation
remote
System control number
(GPO)99298033

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