Intermediate Strain-Rate Loading Experiments - Technique and Applications to Ceramics

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Description

A new test methodology is described which allows access to loading rates that lie between split Hopkinson bar and shock-loading techniques. Gas gun experiments combined with velocity interferometry techniques have been used to experimentally determine the intermediate strain-rate loading behavior of Coors AD995 alumina and Cercom silicon-carbide rods. Graded-density materials have been used as impactors; thereby eliminating the tension states generated by the radial stress components during the loading phase. Results of these experiments demonstrate that the time-dependent stress pulse generated during impact allows an efficient transition from the initial uniaxial strain loading to a uniaxial stress state as the ... continued below

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7 p.

Creation Information

Chhabildas, L.C. & Reinhart, W.D. August 16, 1999.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

A new test methodology is described which allows access to loading rates that lie between split Hopkinson bar and shock-loading techniques. Gas gun experiments combined with velocity interferometry techniques have been used to experimentally determine the intermediate strain-rate loading behavior of Coors AD995 alumina and Cercom silicon-carbide rods. Graded-density materials have been used as impactors; thereby eliminating the tension states generated by the radial stress components during the loading phase. Results of these experiments demonstrate that the time-dependent stress pulse generated during impact allows an efficient transition from the initial uniaxial strain loading to a uniaxial stress state as the stress pulse propagates through the rod. This allows access to intermediate loading rates over 5 x 10{sup 3}/s to a few times 10{sup 4}/s.

Physical Description

7 p.

Notes

OSTI as DE00009756

Medium: P; Size: 7 pages

Source

  • 15th U.S. Army Symposium on Solid Mechanics, Myrtle Beach, SC (US), 04/12/1999--04/14/1999

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  • Report No.: SAND99-2116C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 9756
  • Archival Resource Key: ark:/67531/metadc793482

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • August 16, 1999

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • April 11, 2017, 3:28 p.m.

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Chhabildas, L.C. & Reinhart, W.D. Intermediate Strain-Rate Loading Experiments - Technique and Applications to Ceramics, article, August 16, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc793482/: accessed August 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.