Sliding crack model for the uniaxial compression of rock
2007 (English)In: Proceedings of the 1st Canada-US Rock Mechanics Symposium - Rock Mechanics Meeting Society's Challenges and Demands, Taylor & Francis, 2007, 575-580 p.Conference paper (Refereed)
Uniaxial compression tests on rocks, if conducted at stresses below failure, typically show non-linearity in the stress-strain curve, and hysteresis. Walsh (J. Geophys. Res., 1965) explained this behavior in terms of frictional sliding along the faces of closed cracks. Although well known and widely cited, Walsh's model has not previously been developed in sufficient detail to be used for quantitative predictions. We revisit and extend his model, by including the effect of the stress required to close an initially open crack, and we examine the unloading process in detail. Our analysis leads to closed-form expressions for the loading and unloading portions of the stress-strain curve, as functions of elastic modulus of the uncracked rock, the crack density, the characteristic aspect ratio, and the crack friction coefficient. The model provides a good fit to the loading and unloading portions of the stress-strain curves, for experimental data on sandstones taken from the literature.
Place, publisher, year, edition, pages
Taylor & Francis, 2007. 575-580 p.
Aspect ratio, Compression testing, Concrete aggregates, Concrete pavements, Cracks, Curve fitting, Data compression, Friction, Rock mechanics, Rocks, Stress-strain curves, Stresses, Unloading
IdentifiersURN: urn:nbn:se:kth:diva-154979ISI: 000252215300070ScopusID: 2-s2.0-56149101977ISBN: 0415444012ISBN: 978-041544401-9OAI: oai:DiVA.org:kth-154979DiVA: diva2:759315
1st Canada-US Rock Mechanics Symposium - Rock Mechanics Meeting Society's Challenges and Demands, 27 May 2007 through 31 May 2007, Vancouver, BC, Canada
QC 201410292014-10-292014-10-292014-10-29Bibliographically approved