A 3D grain-based model (3D-GBM) based on the tessellated Voronoi technology is proposed in this current work using the three-dimensional particle flow code (PFC3D). A dimensionless heterogeneity index is introduced to quantitatively express the spatial distribution of grain shape and size. A continuous calibrated parameter strategy was performed to examine the micro-parameters of the 3D-GBM through the QianJiang salt rock. The effect of geometrical heterogeneity caused by the shape and arrangement of the grains on the responses of stress-strain curves, strength characteristics, microcracking behavior associated with failure modes is investigated. The simulated results show that the 3D-GBM can capture the strength properties and deformation behavior associated with the failure modes of salt rock. This model provides an alternative and promising method to deeply investigate the micro-mechanical response at the grain size, deepening our understanding of the mechanical properties of salt rocks in underground gas storage during the static load.
A 3D Grain-Based Model for Simulating Heterogenous Properties of Salt Rock Under Uniaxial Compression Test
Li, Huan, Yang, Chunhe, Zhang, Haina, Yang, Jie, Zhang, Yuhao, Han, Yue, Xue, Tianfu, and Changkun Ma. "A 3D Grain-Based Model for Simulating Heterogenous Properties of Salt Rock Under Uniaxial Compression Test." Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, New York City, New York, June 2019.
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