Evaluation of a Hopkinson bar fly-away technique for high amplitude shock accelerometer calibration

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A split Hopkinson bar technique has been developed to evaluate the performance of accelerometers that measure large amplitude pulses. An evaluation of this technique has been conducted in the Mechanical Shock Laboratory at Sandia National Laboratories (SNL) to determine its use in the practical calibration of accelerometers. This evaluation consisted of three tasks. First, the quartz crystal was evaluated in a split Hopkinson bar configuration to evaluate the quartz gage`s sensitivity and frequency response at force levels of 18,000, 35,000 and 53,000 N at ambient temperature, {minus}48 C and +74 C. Secondly, the fly away technique was evaluated at shock ... continued below

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11 p.

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Togami, T.C.; Bateman, V.I. & Brown, F.A. November 1, 1997.

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Description

A split Hopkinson bar technique has been developed to evaluate the performance of accelerometers that measure large amplitude pulses. An evaluation of this technique has been conducted in the Mechanical Shock Laboratory at Sandia National Laboratories (SNL) to determine its use in the practical calibration of accelerometers. This evaluation consisted of three tasks. First, the quartz crystal was evaluated in a split Hopkinson bar configuration to evaluate the quartz gage`s sensitivity and frequency response at force levels of 18,000, 35,000 and 53,000 N at ambient temperature, {minus}48 C and +74 C. Secondly, the fly away technique was evaluated at shock amplitudes of 50,000, 100,000, 150,000 and 200,000 G (1 G = 9.81 m/s{sup 2}) at ambient temperature, {minus}48 C and +74 C. Lastly, the technique was performed using a NIST calibrated reference accelerometer. Comparisons of accelerations calculated from the quartz gage data and the measured acceleration data have shown very good agreement. Based on this evaluation, the authors expect this split Hopkinson fly away technique to be certified by the SNL Primary Standards Laboratory.

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11 p.

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OSTI as DE98002650

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  • 68. shock and vibration symposium, Baltimore, MD (United States), 3 Nov 1997

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  • Other: DE98002650
  • Report No.: SAND--98-1444C
  • Report No.: CONF-971164--
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 292860
  • Archival Resource Key: ark:/67531/metadc683784

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

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  • November 1, 1997

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  • July 25, 2015, 2:20 a.m.

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  • Nov. 30, 2015, 8:23 p.m.

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Togami, T.C.; Bateman, V.I. & Brown, F.A. Evaluation of a Hopkinson bar fly-away technique for high amplitude shock accelerometer calibration, article, November 1, 1997; United States. (digital.library.unt.edu/ark:/67531/metadc683784/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.