Extended calibration of thin-foil manganin gage in ALOX material

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Description

The purpose of this program was to extend an existing manganin gage calibration curve, correlating stress as a function of change in gage resistance/gage resistance ({Delta}R/R), and obtain gage repeatability data from stripped manganin thin-foiled gages manufactured by the Measurements Group Inc., Micro-Measurements division. The experiments extended the existing calibration curve range from the current 0.5 GPa to 6.1 GPa by examining impact stresses of 0.1 GPa in the lower range, and 8.0 and 10.0 GPa in the higher range. The manganin gages were embedded in ALOX (42% by volume alumina in EPON 828 epoxy) material. A light gas-gun was ... continued below

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8 p.

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Salas, J.; Duggins, B.D. & Benham, R.A. March 1, 1998.

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

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Description

The purpose of this program was to extend an existing manganin gage calibration curve, correlating stress as a function of change in gage resistance/gage resistance ({Delta}R/R), and obtain gage repeatability data from stripped manganin thin-foiled gages manufactured by the Measurements Group Inc., Micro-Measurements division. The experiments extended the existing calibration curve range from the current 0.5 GPa to 6.1 GPa by examining impact stresses of 0.1 GPa in the lower range, and 8.0 and 10.0 GPa in the higher range. The manganin gages were embedded in ALOX (42% by volume alumina in EPON 828 epoxy) material. A light gas-gun was used at Sandia National Laboratories Explosive Components Facility (ECF) to drive an impactor material, ALOX or Tungsten, into the ALOX target containing two gages in a centered arrangement. Tilt and velocity of the impactor were measured along with the gage outputs. A total of 11 tests were conducted using the same ALOX target material that was used when obtaining the original calibration curve. Two initial tests were completed using Polymethyl Methacrylate (PMMA) as the impactor and target at an impact pressure of 3.3 GPa for comparison of gage output with analysis and literature values. The installed gage, stripped of its backing, has a nominal thickness of 5 microns. The thin gage and high speed instrumentation allowed higher output resolution measurements than can be obtained with 76 microns manganin wire used previously. The areas of investigation that will be presented include: (1) experimental setup, (2) comparison with existing calibration curve, and (3) discussions of the extended calibration data.

Physical Description

8 p.

Notes

OSTI as DE98005034

Source

  • 1998 ASME/JSME joint pressure vessel and piping (PVP) conference, San Diego, CA (United States), 26-30 Jul 1998

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  • Other: DE98005034
  • Report No.: SAND--97-2368C
  • Report No.: CONF-980708--
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 654157
  • Archival Resource Key: ark:/67531/metadc711819

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Office of Scientific & Technical Information Technical Reports

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

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Creation Date

  • March 1, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 14, 2016, 3:52 p.m.

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Salas, J.; Duggins, B.D. & Benham, R.A. Extended calibration of thin-foil manganin gage in ALOX material, article, March 1, 1998; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc711819/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.