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IssuesArchive of Issues2021-3pp.301-311

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Suknev S.V., "Application of the finite fracture mechanics approach to assess the failure of a quasi-brittle material with a circular hole," Mech. Solids. 56 (3), 301-311 (2021)
Year 2021 Volume 56 Number 3 Pages 301-311
DOI 10.3103/S0025654421030110
Title Application of the finite fracture mechanics approach to assess the failure of a quasi-brittle material with a circular hole
Author(s) Suknev S.V. (Chersky Institute of Mining of the North of the Siberian Branch of the Russian Academy of Sciences, Yakutsk, 677980 Russia, suknyov@igds.ysn.ru)
Abstract The size effect of the strength of structurally inhomogeneous materials is manifested, in particular, in the dependence of the failure load on the size of the stress concentration zone that occurs near material or geometric inhomogeneities (inclusions, pores, cutouts, fillets). Although the size of the stress concentration zone is determined primarily by the size and shape of the inhomogeneity, the loading conditions also have a certain effect. In addition, the predictive value of the fracture theory is determined not only by the ability to take into account the size effect, but also by the possibility of extending the theory to the widest possible range of boundary conditions. The influence of boundary conditions and hole diameter on the initiation of tensile cracks at a circular hole in a quasi-brittle geomaterial under non-uniformly distributed compression was studied theoretically and experimentally, taking into account the scale factor. On the basis of the approach of the finite fracture mechanics, a criterion of quasi-brittle fracture is proposed. The results of calculating the critical stress are compared with the obtained experimental data.
Keywords quasi-brittle fracture, geomaterial, size effect, hole, finite fracture mechanics
Received 17 February 2020Revised 20 February 2020Accepted 25 February 2020
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