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Research Article| October 01, 1955 EXPERIMENTAL STUDY OF THE STRENGTH OF ROCKS EUGENE C ROBERTSON EUGENE C ROBERTSON DUNBAR LABORATORY, HARVARD UNIV., CAMBRIDGE 38, MASS. Search for other works by this author on: GSW Google Scholar Author and Article Information EUGENE C ROBERTSON DUNBAR LABORATORY, HARVARD UNIV., CAMBRIDGE 38, MASS. Publisher: Geological Society of America Received: 16 Mar 1954 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1955, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1955) 66 (10): 1275–1314. https://doi.org/10.1130/0016-7606(1955)661275:ESOTSO2.0.CO;2 Article history Received: 16 Mar 1954 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation EUGENE C ROBERTSON; EXPERIMENTAL STUDY OF THE STRENGTH OF ROCKS. GSA Bulletin 1955;; 66 (10): 1275–1314. doi: https://doi.org/10.1130/0016-7606(1955)661275:ESOTSO2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract An experimental investigation of the homogeneous Solenhofen limestone and a number of other rocks was made to determine their their strengths while under moderate hydrostatic pressure at room temperature. The other rocks were fossiliferous limestone, shaly limestone, marble, granite, diabase quartzite, slate, soapstone, verde antique, and sandstone. The minerals tested were pyrite, quartz, microcline, and fluorite.Three types of experimental procedures were used: compression of solid cylinders, crushing of hollow cylinders, and punching of disks. The specimens were all carefully shaped right circular cylinders, and during the tests were jacketed to prevent penetration by the pressure fluid. The hydrostatic pressures ranged from 1 atmosphere to 4000 kg/cm2. Measurements were made to obtain strains and stresses developed in each specimen for deformation to the point of rupture or into the plastic range; the duration of the tests was 1–8 hours.All rock specimens exhibited a range of elastic linearity of stress with strain. Under moderate hydrostatic pressures, the limestones and marbles could be made to flow plastically to large deformations, and some heating experiments on limestone demonstrated an increase of plasticity with heating. None of the silicate rocks and minerals exhibited any plastic behavior.The experimental data were examined with reference to various criteria of failure. The maximum shear-stress criterion was found to be reliable in predicting the yield point for the limestones, and was found to be an approximate guide to failure of limestone by rupture.The silicate rocks failed by rupture, and their rupture strength was increased by hydrostatic pressure. A rough, empirical criterion of failure was found for rupture of silicate rocks, namely, linearity of maximum shear stress with mean stress. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Eugene C. Robertson (Sat,) studied this question.