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Stress anisotropy and concentration effects in high pressure measurementsSodium chloride is used as an internal pressure standard in high pressure research. Possible corrections are discussed which are needed in the calibration of this standard due to the independent effects of stress anisotropy and stress concentration in pressure vessels. The first is due to the lack of a truly hydrostatic state of stress in solid state pressure vessels. The second is due to the difference in the compressibilities between the pressure transmitting substances (sodium chloride) and a stiffer test specimen. These two corrections are then combined and a total correction, as a function of measured pressure, is discussed for two systems presently in use. The predicted value of the combined effect is about 5-10% of the pressure at 30 GPa.
Document ID
19750012692
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Nelson, D. A., Jr. (Cornell Univ. Ithaca, NY, United States)
Ruoff, A. L. (Cornell Univ. Ithaca, NY, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1974
Subject Category
Structural Mechanics
Report/Patent Number
REPT-2345
NASA-CR-142600
Accession Number
75N20764
Funding Number(s)
CONTRACT_GRANT: NGR-33-010-189
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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