Calibration of a Hopkinson bar with a transfer standard

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5118147

Bateman, V I; Leisher, W B; Brown, F A; Davie, N T

During the past year, program field test temperatures, that are beyond the test accelerometer operational limits of {minus}30{degrees}F and +150{degrees}F, required the calibration of accelerometers at high shock levels and at the temperature extremes of {minus}50{degrees}F and +160{degrees}F. The purposes of these calibrations were to insure the accelerometers operated at the field test temperatures and to provide an accelerometer sensitivity at each test temperature. Since there is no NIST-traceable (National Institute of Standards and Technology traceable) calibration capability at shock levels of 5,000g--15,000g for the temperature extremes of {minus}50{degrees}F and +160{degrees}F, a method for calibrating and certifying the Hopkinson bar with a transfer standard was developed. Time domain and frequency domain results are given that characterize the Hopkinson bar. The NIST accuracy for the standard accelerometer in shock is {plus minus}5%. The Hopkinson bar has been certified by the Sandia Secondary Standards Division with an uncertainty of 6%. 12 refs., 5 figs.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5118147
• Report Number(s): SAND-91-1131C; CONF-9110189--4; ON: DE92002348
• Country of Publication: United States
• Language: English

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42 ENGINEERING
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440800* -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
ACCELERATION
ACCELEROMETERS
BENCHMARKS
CALIBRATION
ELEMENTS
FOURIER TRANSFORMATION
FREQUENCY ANALYSIS
IMPACT SHOCK
INTEGRAL TRANSFORMATIONS
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
RODS
SHOCK WAVES
STRAIN GAGES
STRESSES
TITANIUM
TRANSFORMATIONS
TRANSITION ELEMENTS