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strain transfers from the compaction to dilation [20, 40, 42, 43]. The stress evolution against the axial, radial and volumetric strains and the permeability evolution against axial strain are shown... compaction to dilation agrees with the percolation strength, which occurs when the permeability curve suddenly increases sharply. The results strongly support the discoveries of other researchers......
deformable blocks. Both shear and tensile failure are considered, and the joint dilation is included. Equations (1)-(4) are the formulas describing the Mohr-Coulomb yield criterion in 3DEC [9]: ...≤σ2≤σ3, where φ is the friction angle, c is the cohesion, σ t is the tensile strength, ψ is the dilation angle, ft and f s are the yield functions, and N is the friction index. The potential......
dilation of the specimen. So the strain energy U of rock in the whole process of tri-axial tests can be expressed as U=U1+U3 ... conversion rate of strain energy for radial dilation U3 (a), damage strain energy Ud (b) and stored elastic strain energy Ue (c) 1) Under low initial confining pressure (10 MPa), there is more......
compressibility and dilation. The boundary between these two zones is defined by the condition (see Fig. 1). 3.2 Identification of model parameters The proposed model contains seven parameters: two elastic... compressibility–dilation transition, degradation of elastic properties and failure coefficient. The proposed model can be adopted to describe other time-dependent behaviors, such as the relaxation test, unloading......
Rock Mechanics Association, 2010: 58–62. [12] ZHOU Jia, DONG Yu-fei, de PETER C J, ZITHA P L J. Experimental study of the impact of shear dilation and fracture behavior during polymer injection... R, OLSON J E, SHARMA M M. Permeability anisotropy and dilation due to shear failure in poorly consolidated sands [C]// SPE 152432, Hydraulic Fracturing Technology Conference. Woolands, 2012. [14......
AARON S, SCHNEIDER JAMES A. Influence of dilation angle on drained shallow circular anchor uplift capacity [J]. International Journal of Geomechanics, 2017, 17(2): 04016056. [14] LIU Hua-qiang, HUANG...] ZHAO Lian-heng, LI Liang, YANG Feng, LIU Xiang. Joined influences of nonlinearity and dilation on the ultimate pullout capacity of horizontal shallow plate anchors by energy dissipation method [J......
the method proposed in this paper. The calculation method could provide reference basis for the design and construction of karst tunnels in the future. 2 Limit analysis with nonlinearity and dilation..., 2017, 24(4): 957–966. [20] YANG X L, ZHANG R. Collapse analysis of shallow tunnel subjected to seepage in layered soils considering joined effects of settlement and dilation [J]. Geomechanics......
and the macro dilation. WASANTHA et al [17] investigated the water-weakening behaviour of Hawkesbury sandstone in brittle regime and one of their observations suggests that micro-cracking begins..., the testing apparatus does positive work on the specimen in axial direction and confining pressure does negative work, due to the radial dilation of the specimen [26].Hence, the total strain energy (U),evolves......
a zero mean and localization in time and frequency domains [25, 26]. The baby wavelet ψa,b can be obtained by dilation and translation of the mother wavelet: (1) where a and b are the scale and translation parameters, respectively; t is the time of dilation and translation......
and unevenness shape features play different roles in macroscopic behaviors of rock joint. The waviness, noted as the large-scale roughness, tends to result in the dilation of rock joint under shearing while... to correlate the small-scale roughness (determined from laboratory data) and large-scale waviness (determined from geologic observations) with the dilation and strength of rock joints. Consequently......
