TRIS Online Record

Title	THE FAILURE OF THICK-WALLED HOLLOW CYLINDERS OF ISOTROPIC ROCK
Accession No	00234952
Authors	Hoskins, E K
Journal Title	Intl Journal Rock Mech & Mining Science
Corp. Authors / Publisher	Pergamon Press Limited
Publication Date	19690100
Abstract	A SERIES OF EXPERIMENTS WERE PERFORMED ON THICK-WALLED HOLLOW CYLINDERS OF FIVE DIFFERENT TYPES OF ISOTROPIC ROCK. THE MAGNITUDE OF THE INTERMEDIATE PRINCIPAL STRESS APPEARS TO HAVE A MARKED AND REGULAR EFFECT ON THE STRENGTH OF THESE ROCKS. NONE OF THE COMMONLY USED FAILURE CRITERIA FOR BITTLE MATERIALS ADEQUATELY DESCRIBE THE RESULTS OF THESE EXPERIMENTS. A RECENT PROPOSAL TO GENERATE A FAILURE SUFACE FOR A GIVEN MATERIAL BY ROTATING TRIAXIAL TEST DATA ABOUT THE PRINCIPAL STRESS AXIS SEEMS TO BE SUPPORTED BY THESE TEST RESULTS AT LEAST AT LOW CONFINING PRESSURES. THERE APPEARS TO BE A SMOOTH TRANSITION BETWEEN EXTENSION AND COMPRESSION FAILURE UNDER COMBINED POLYAXIAL STRESS CONDITIONS. THE POSSIBLE EFFECTS OF STRESS GRADIENTS ON ROCK STRENGTH AND THE TYPES OF FRACTURE OBSERVED IN THESE TESTS ARE DISCUSSED. /RRL(A)/
Supplemental Information	Vol 6, No 1, PP 99-125, 21 FIG, 5 TAB, 6 PHOT, 42 REF
TRT Terms	Failure ; Fracture mechanics ; Isotropy ; Rocks ; Strength of materials ; Stresses ; Thickness ; Triaxial shear tests
Other Terms	Cylinders; Fracturing; Strength; Triaxial testing
Subject Areas	H63 MECHANICS (EARTH MASS)
Document Source	Road Research Laboratory /UK
TRIS Files	HRIS
Database	TRIS Online

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