Analysis of Hopkinson bar pressure gage. Final report

Technical Report · Fri Jan 01 04:00:00 EST 1993

OSTI ID:6536196

Baylot, J T

U.S. Army Engineer Waterways Experiment Station (WES) designed Hopkinson pressure bar gages were fielded on the Dilute Explosive Tile (DET) test along with New Mexico Engineering Research Institute (NMERI) designed bar gages and pressure gages manufactured by PCB Piezotronics, Inc. On the Mineral Find 3 (MF3) explosive test, WES bar gages were fielded along with pressure transducers manufactured by Kulite. The peak pressures recorded by the PCB ages were much higher than those recorded by the WES bar gages on the DET test. The peak stresses were higher for the Kulite gages than for the WES bar gages in the MF3 test. In each of these tests, the stresses recorded later in time for the bar gage were higher than those recorded for the other types of gages. The NMERI gages indicated that the pressure time-history had two significant peaks while the WES gages indicated only one significant peak. One-half of the surviving PCB gages agreed with the WES gages, while one-half agreed with the NMERI gages. Analytical and finite element (FE) calculations were performed to assess the response of the bar gages in these tests. The analytical solutions included only the bar and agreed extremely well with comparable FE calculations. These calculations indicated that the primary reason for the low peak stress readings in the bar gages was the lower frequency response capability of the recording system used to record the bar gage data. The calculations also indicated that the presence of water around the bar did not significantly affect the measured peak stress in the bar, and that the drag of the water past the bar did not cause significant forces to be developed in the bar.

• Research Organization: Army Engineer Waterways Experiment Station, Vicksburg, MS (United States). Structures Lab.
• OSTI ID: 6536196
• Report Number(s): AD-A-262366/8/XAB; WES/TR/SL--93-1
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420200 -- Engineering-- Facilities
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440800* -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
CALCULATION METHODS
COMPUTERIZED SIMULATION
EXPLOSIONS
FIELD TESTS
FINITE ELEMENT METHOD
HIGH PRESSURE
MEASURING INSTRUMENTS
NATIONAL ORGANIZATIONS
NUMERICAL SOLUTION
PRESSURE GAGES
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US DOD
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