caa a22 4500 469123192 CHVBK 20180323133144.0 cr unu---uuuuu 170328e19921001xx s 000 0 eng 10.1007/BF00035074 doi (NATIONALLICENCE)springer-10.1007/BF00035074 Tensile fracture from circular cavities loaded in compression [Elektronische Daten] [Bruce Carter, Emery Lajtai, Yanguang Yuan] When a block of rock containing an equi-dimensional void is loaded in compression, the resulting fracture may form at one of three basic positions: at the tensile stress concentration of the perimeter (primary fracture), at the compressive stress concentration of the perimeter (slabbing fracture), or off the perimeter, remote to the cavity (remote fracture). All three are genetically similar; they form and propagate parallel to the direction of the maximum compressive stress. The location of the fracture with respect to the cavity is controlled by the cavity size and the confining pressure. Although LEFM solutions exist for the primary fracture, the mathematical crack of fracture mechanics is ill-suited to analyze fractures that form in a primarily compressive state of stress (remote and slabbing fractures); the mathematical crack is independent of the compressive stress acting along its plane. A stress-based solution is proposed that incorporates the effect of both the maximum and the minimum principal stress. The major shortcoming of conventional stress-based techniques, the lack of size dependence, is removed by a procedure of stress averaging over a constant distance or area. For the case of the cylindrical cavity, stress averaging along the primary fracture path can be built into a closed-form solution. Averaging stresses over a constant area requires numerical techniques. Physical experiments, involving the compression loading of cylindrical cavities in three rocks: a granite, a limestone and a salt rock provide data for the comparison and the calibration of the theoretical criteria. Stress averaging over a constant area gave the best agreement with the test data. Kluwer Academic Publishers, 1992 Carter Bruce Department of Civil, The University of Manitoba, R3T 2N2, Winnipeg, Manitoba, Canada aut Lajtai Emery Department of Civil, The University of Manitoba, R3T 2N2, Winnipeg, Manitoba, Canada aut Yuan Yanguang Department of Civil, The University of Manitoba, R3T 2N2, Winnipeg, Manitoba, Canada aut International Journal of Fracture Kluwer Academic Publishers 57/3(1992-10-01), 221-236 0376-9429 57:3<221 1992 57 10704 https://doi.org/10.1007/BF00035074 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00035074 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Carter Bruce Department of Civil, The University of Manitoba, R3T 2N2, Winnipeg, Manitoba, Canada aut NATIONALLICENCE 700 1- Lajtai Emery Department of Civil, The University of Manitoba, R3T 2N2, Winnipeg, Manitoba, Canada aut NATIONALLICENCE 700 1- Yuan Yanguang Department of Civil, The University of Manitoba, R3T 2N2, Winnipeg, Manitoba, Canada aut NATIONALLICENCE 773 0- International Journal of Fracture Kluwer Academic Publishers 57/3(1992-10-01), 221-236 0376-9429 57:3<221 1992 57 10704 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer