dc.contributor.author | XP, Zhou | |
dc.contributor.author | XC, Huang | |
dc.contributor.author | Berto, Filippo | |
dc.date.accessioned | 2019-02-26T13:53:42Z | |
dc.date.available | 2019-02-26T13:53:42Z | |
dc.date.created | 2018-11-26T10:43:06Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Theoretical and applied fracture mechanics (Print). 2018, 97 409-418. | nb_NO |
dc.identifier.issn | 0167-8442 | |
dc.identifier.uri | http://hdl.handle.net/11250/2587563 | |
dc.description.abstract | Rock-like materials are driven not only by applied stresses, but also by time that exhibits creep characteristics. It is significant to establish three-dimensional long-term strength criterion of rocks. In this paper, it is assumed that there exist three-dimensional penny-shaped microcracks in viscoelastic rock matrix. The mode II and mode III stress intensity factors at tips of three-dimensional penny-shaped microcracks in viscoelastic rock matrix are determined. The orientation angle of micro-failure in rock materials is obtained to describe the creep failure of rocks. The relationship between the micro-failure orientation angle and stress components is derived from the creep fracture criterion. Failure characteristic parameters of penny-shaped microcracks under triaxial creep compressive condition are defined, which are an invariant. A three-dimensional long-term strength criterion of rocks is established using micromechanical method, in which the effects of the intermediate principal stress are taken into account. The proposed three-dimensional long-term strength criterion is novel, and never published before. By comparison with the previous experimental data, it is found that the presented three-dimensional long-term strength criterion is in good agreement with the experimental data. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Elsevier | nb_NO |
dc.title | A three-dimensional long-term strength criterion of rocks based on micromechanical method | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | acceptedVersion | nb_NO |
dc.source.pagenumber | 409-418 | nb_NO |
dc.source.volume | 97 | nb_NO |
dc.source.journal | Theoretical and applied fracture mechanics (Print) | nb_NO |
dc.identifier.doi | 10.1016/j.tafmec.2017.07.003 | |
dc.identifier.cristin | 1634922 | |
dc.description.localcode | This article will not be available due to copyright restrictions (c) 2018 by Elsevier | nb_NO |
cristin.unitcode | 194,64,92,0 | |
cristin.unitname | Institutt for maskinteknikk og produksjon | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 1 | |