Double torsion testing machine to determine the subcritical fracture index in rocks
This paper discusses the design methodology applied to build a testing machine to determine the sub-critical fracture index in a rock, based on double torsion testing in order to characterize naturally fractured formations such as those located in the Colombian Llanos Foothill Basin . These formations have been subjected to cyclic loads over time, causing fractures that trend to spread at sub-critical stress intensity values. Similarly, it presents the results of testing conducted on nine specimens of the Tambor Formation from 2 different outcrops to establish the testing traceability in the equipment.
A.G., E. (s.f.). A method for evaluating the time-dependent failure characteristics.
ASTM D6026-06.Standard Practice for Using Significant
Digits in Geotechnical Data.
ASTM-D4543-08.Standard Practices for Preparing Rock Core as Cylindrical Test Specimens and Verifying Conformance to Dimensional and Shape Tolerances.
Atkinson, B. K. (1984). Subcritical crack growth in geological materials. J. Geophys., Res. 89, 4077-4114.
Atkinson, B., & Meredith, P. G. (1987).The theory of subcriti- cal crack growth with applications to rocks and minerals, in Fracture Mechanics. 111-116: Academic Press, London.
Cho, K., & Gent, A. N. (1985).An improved torsional method for determining the fracture toughness of stiff materials and of adhesive joints. International. J. Fracture, 239-244.
Evans, A. (1972). A method for evaluating the time-dependent failure characteristics. J. Materials Scie., 7(10), 1137-
G. Budynas, R., & Keith Nisbett, J. (2008). Diseño en Inge- niería Mecánica de Shigley. McGrawHill.
Gerry, D., &Outwater, J. (1969). On the fracture energy, rehearing velocity and refracture energy of cast epoxy resin. J. Adhesion, 1:290 298.
Holder, J., Olson, J. E., & Zeno, P. (2001).Experimental determination of subcritical crack growth.Geophysical Research Letters , 599-602.
Kies, J., & Clark, A. (1969).Kies JA, Clark ABJ. Fracture propagation rates and times to fail proof stresses in bulk glass. Proceedings of the Second International Conference on Fracture; 483-491.
Ko, T. Y. (2008). Experimental study of subcritical crack growth under mode I, mode II and mode III loading.The University of Arizona, Department of Mining and Geo- logical Engineering, Tucson, AZ, U.S.A.
M. Ciccotti, G. G. (2000). The double torsion loading con- figuration for fracture propagation: an improved metho- dology for the load-relaxation at constant displacement. Dipartimento di Fisica, Settore di Geofisica, UniversitÁ di Bologna.
M. Saadaouia P. Reynauda, G. F. (2000). Slow crack growth study of plaster using the double torsion method. Ceramics International 26 (4), 435 -439.
Nara, Y. (2006). Subcritical Crack Growth in Rock.COE Postdoctoral Fellow, Division of Field Engineering for Environment.
Outwater, J. O., & Gerry, D. J. (1966). On the fracture en- ergy of glass NRL Interim Contract Report.University of Vermont, Burlington.
Park, N. (2006). Discrete Element Modeling of Rock Frac- ture Behavior: Fracture Toughness and Time-Dependent Fracture Growth, Dissertation by Doctor Philosophy.The University of Texas at Austin.
Sun, Z., & Ouchterlony, F. (1999). Fracture toughness of stripa granite cores. International J. Rock Mechanics and Min- ing Science &GeomechanicsAbstracts, 23 (6), 399-409 .
Whittaker BN, S. R. (1992). Rock Fracture Mechanics - Prin- ciples, Design and Applications. Elsevier Science, 90-107.
Williams, D., & Evans, A. (1973-1). A simple method for studying slow crack growth.J. Test Eval , 264-270.
This journal uses Crossref's Cited-By and Reference Linking, so that we can display the citations registered in Crossref here.
This document does not have Crossref citations yet.