Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1983-05-16
1985-03-05
Ciarlante, Anthony V.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73820, 73825, 73826, G01N 308
Patent
active
045023387
ABSTRACT:
A triaxial cell apparatus for conducting constant lateral stress tests, constant volume tests and zero lateral strain tests on particulate materials. Pressure and volume measuring devices are in communication with a flexible inner specimen cylinder and with a rigid outer cylinder mounted on the apparatus frame. A control panel permits the compressed air confining stress to be regulated as axial stress is applied through a piston assembly having the same cross-sectional area as the specimen cylinder. The different tests are conducted by various combinations and hookups between the pressure and volume measuring devices and the control panel. The tests can be performed on a specimen so that the stress history of that material may be determined for later use in confining structure design.
REFERENCES:
patent: 2531083 (1950-11-01), Smith
patent: 2711644 (1955-06-01), Myers
patent: 3608367 (1971-09-01), Karol
patent: 3616685 (1971-11-01), Strom
patent: 3890830 (1975-06-01), Dyck
patent: 4122704 (1978-10-01), Lutenegger et al.
Lohnes Robert A.
Smith David L. O.
Ciarlante Anthony V.
Iowa State University & Research Foundation, Inc.
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