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Stress anisotropy and concentration effects in high pressure measurements (1974)

Nelson, D. A., Jr. ; Ruoff, A. L.

In: CASI

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Publication Date: 2019-06-27

Description: Sodium 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.

Keywords: STRUCTURAL MECHANICS

Type: NASA-CR-142600 , REPT-2345

Format: application/pdf

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