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• W2795729620 endingPage "71" @default.
• W2795729620 startingPage "64" @default.
• W2795729620 abstract "Historic stress path strongly influences the variations of shear fracture, and crack geometry has a great significance for the mechanical properties of brittle solids (e.g., rock, ceramic, glass, and concrete, rock is the major object in this study) in static compression. In this study, a new analytic method is proposed to predict the effect of historic stress path on static shear properties under different crack angles. An improved stress intensity factor containing crack angle effect is derived by use of the wing crack model. Drawing a relation between crack growth and strain obtained from the correlation of micro and macro damages into this improved stress intensity factor, a crack growth- based stress- strain relation considering crack angle effect is given. Coupling the crack growth-based stress–strain relation, the Mohr-Coulomb failure criterion and the Mohr-Coulomb strain-softening model, an analytic solution describing the variation of shear properties along with the increasing strain at the post- peak area of stress- strain curve is proposed. And then drawing the time-dependent strain caused by subcritical crack growth considering the effect of stress path into this analytic solution, the effects of stress path on variations of shear properties over time caused by subcritical crack growth under different crack angles are studied in static compression. Furthermore, the effects of crack angle and crack size on compressive strength, static failure time, peak internal friction angle, and peak shear strength are analyzed. The stress-stepping evolutions of cohesion, internal friction angle and shear strength under different crack angles are also discussed. Rationality of the analytic method is verified by comparing with the published experimental results. The study results provide a possible analytic method to explain the effects of external loadings and internal crack geometries on unmeasured shear properties of brittle rocks in static compression." @default.
• W2795729620 created "2018-04-13" @default.
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• W2795729620 date "2018-08-01" @default.
• W2795729620 modified "2023-10-18" @default.
• W2795729620 title "Static shear fracture influenced by historic stresses path and crack geometries in brittle solids" @default.
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• W2795729620 doi "https://doi.org/10.1016/j.tafmec.2018.04.002" @default.
• W2795729620 hasPublicationYear "2018" @default.
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