Abstract
Current research on coarse-grained soils focuses mostly on the physical and mechanical properties of particle aggregates. For the study of the coarse-grained soil’s breaking behavior, the particle contact experiments involving marble particles are carried out by employing Rock Rheological Testing System, through which the mechanical properties and microscopic mechanism of marble particles’ contact breakage are analyzed. Moreover, the numerical simulation with parameters for strength reduction is performed to reveal the breakage process. The study shows that, the local breakage is occurred firstly in the contact area and then the Elastic Core is formed under normal contact force. The existing of the Elastic Core changes the path of force transfer that results in overall breakage of the particle after crack coalescence. Considering the stress concentration in contact breakage, parameters calibrated through uniaxial compression test are unsuitable for numerical simulation. The introduction of strength reduction parameters contribute to the simulation on the morphology after breakage.
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Zhou, J., Yu, S., Zhang, J., Zhao, C. (2018). Experiment and Numerical Simulation on Contact and Breakage of Marble Particles. In: Zhang, L., Goncalves da Silva, B., Zhao, C. (eds) Proceedings of GeoShanghai 2018 International Conference: Rock Mechanics and Rock Engineering. GSIC 2018. Springer, Singapore. https://doi.org/10.1007/978-981-13-0113-1_17
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DOI: https://doi.org/10.1007/978-981-13-0113-1_17
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