Numerical modelling of uniaxial compressive failure of granite with and without saline porewater
2008 (English)In: International Journal of Rock Mechanics And Mining Sciences, ISSN 1365-1609, Vol. 45, no 7, 1126-1142 p.Article in journal (Refereed) Published
It is important for rock engineering design to be able to validate numerical simulations, i.e. to check that they adequately represent the rock reality. In this paper, the capability and validity of four numerical models is assessed through the simulation of an apparently simple case: the complete process of microstructural breakdown during the uniaxial compressive failure of intact crystalline rock. In addition to comparing the capabilities of the four models, the results generated by each model were compared with the experimentally determined complete stress-strain curves for the Swedish Avro granite for different porewater conditions. In this way, it has been possible to audit the models' adequacy for this particular simulation task. It was found that although the models had common features, they were each idiosyncratically different and required considerable expertise to match the actual stress-strain curves (which did not monotonically increase in axial strain)-indicating that, for more complex simulations, both adequate modelling and appropriate validation are not going to be an easy task. The work was conducted within the framework of the international 2004-2007 DEmonstration of COupled models and their VALidation against EXperiments with emphasis on Thermo Hydro Mechanic and Chemical aspects (DECOVALEX-THMC) phase on coupled modelling extended to include chemical effects and with application to the excavation damaged zone (EDZ) in crystalline rock.
Place, publisher, year, edition, pages
2008. Vol. 45, no 7, 1126-1142 p.
numerical modelling; uniaxial compressive strength; Class II behaviour; chemical degradation; auditing process; crystalline rock; DECOVALEX-THMC; ELASTOPLASTIC CELLULAR-AUTOMATON; BONDED-PARTICLE MODEL; LINEAR COMBINATION; ROCK FRACTURE; BRITTLE ROCK; STRAIN; STRENGTH; STRESS; SIMULATION; MECHANICS
IdentifiersURN: urn:nbn:se:kth:diva-8739DOI: 10.1016/j.ijrmms.2007.12.001ISI: 000256907200007ScopusID: 2-s2.0-43649108427OAI: oai:DiVA.org:kth-8739DiVA: diva2:14144
QC 201007092008-06-122008-06-122010-07-09Bibliographically approved