Accession Number:

AD0601013

Title:

BIAXIAL DEVICE FOR DETERMINING THE MODULUS OF ELASTICITY OF STRESS-RELIEF CORES,

Descriptive Note:

Corporate Author:

BUREAU OF MINES WASHINGTON D C

Personal Author(s):

Report Date:

1942-01-01

Pagination or Media Count:

17.0

Abstract:

A device was developed that permits the determination of the modulus of elasticity of the stress-relief cores obtained in the process of making in situ stress measurements. This determination is made by hydraulically loading the external surface of the stress-relief cores and by measuring the corresponding borehole deformation. The theoretical relationship between the borehole deformation, the applied pressure, and the modulus of elasticity is presented. Also, experimental results obtained from measurements on a simulated stress-relief core are given. Because of the symmetrical loading obtained with this device, the isotropy of the core material can be evaluated. With this device it is also possible to study the effect of eccentricity, that is, the effect within cores in which the inner hole is not coincident with the long axis of the specimen. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE