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- #How to model geofoam material in flac3d verification#
- #How to model geofoam material in flac3d series#
#How to model geofoam material in flac3d series#
carried out a series of numerical uniaxial compression tests to obtain the deformation and failure characteristics of the soil-rock mixture with different compositions and structures. The results showed typical characteristics of complete stress-strain curves, and the stone content is an important factor affecting the strength and failure form of soil and stone mixture. also carried out the shear test of soil-rock mixture, and the test results show that the shear strength of soil-rock mixture increases with the increase in stone content, and the shear strength increase is more obvious when the stone content exceeds 40%. The results showed that the change of soil-rock mixture ratio has great influence on the dilatancy of soil-rock mixture. carried out the large-scale triaxial shear test of two mass ratios of soil-rock mixture under four different confining pressures, respectively. In the experimental research, Wu Ming carried out 4 groups of tests of soil-stone mixture and the results showed that the common feature of specimens composed of coarse and fine materials depended on the content of components. Īt present, a lot of experiments and theoretical research on soil-stone mixture were carried out, and achievements in the aspects of mechanical properties and strength criteria of soil-stone mixture were obtained. Meanwhile, its triaxial strength characteristics and failure characteristics are significantly affected by the intermediate principal stress. Soil-stone mixture has strong anisotropy in the layer strike direction and vertical direction. Due to the river scouring and accumulation settlement, the gravels or stones in the soil-stone mixture are arranged in a certain regularity, resulting that the physical and mechanical properties are different from the isotropic soil material. Soil and stone mixture is widely distributed in China, which has a great impact on geotechnical engineering.
#How to model geofoam material in flac3d verification#
Verification modelling was applied as well, and deviation between analytical and numerical solutions in strains of X direction, Y direction, and Z direction was 1.0013, 1.0003, and 1.002, respectively. Composite failure criteria of shear failure and tension cut-off were applied for numerical analysis, and nonassociated flow rule was proposed based on the Mohr–Coulomb model. A user-defined PMC numerical constitutive model was developed for FLAC3D. True triaxial tests were carried on, Paul–Mohr–Coulomb (PMC) failure criterion was used for the strength analysis in soil-stone mixture, and related parameters of PMC model were obtained. Usually soil and stone mixture shows anisotropic features along or perpendicular to the direction of settled layers, and the strength will be significantly affected by intermediate principal stress. Soil and stone mixture is widely distributed in China, and its physical and mechanical properties are complex, which has a significant impact on geotechnical engineering.