Accession Number:

AD0839983

Title:

PROCEDURE FOR FABRICATION AND OPERATION OF MANGANIN SHOCK PRESSURE GAGES.

Descriptive Note:

Rept. for 6 Dec 67-6 May 68,

Corporate Author:

STANFORD RESEARCH INST MENLO PARK CA

Personal Author(s):

• Keough, Douglas D.

Report Date:

1968-08-01

Pagination or Media Count:

102.0

Abstract:

The four-terminal, manganin in C-7 epoxy gage is a piezoresistive transducer used to measure shock stress as a function of time at the interface of a test sample and gage. Knowledge of cross-curve states of the sample is required to relate transducer stress to actual stresses in the sample. Interface stress measurement accuracies, which vary between plus or minus 3 percent and plus or minus 6 percent, depend on the range of stress to which the gage is subjected. Fabrication of a four-terminal gage with a nominal resistance of either 1 ohm or 10 ohms is relatively straightforward. The useful stress range covered by the 1-ohm gage is from about 10 kbar to 300 kbar. The 10-ohm gage can be used for subkilobar recording. A more accurate knowledge of the stress-resistance response of manganin and of the Hugoniot of C-7 epoxy would enhance the usefulness of the four-terminal gage as a quantitative tool. Author

Descriptors:

• (*PIEZOELECTRIC GAGES
• PERFORMANCE(ENGINEERING))
• MANUFACTURING
• OPERATION
• COPPER ALLOYS
• MANGANESE ALLOYS
• NICKEL ALLOYS
• TRANSDUCERS
• SHOCK(MECHANICS)
• STRESSES

Subject Categories:

• Fabrication Metallurgy
• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE