Abstract
Particle shape is one of the significant factors which affect the mechanical behaviors of granular materials , including the critical state behavior. The real particle shape is considered using a well verified rotational resistance model. The critical state of cubic granular samples under different mean effective stress (p’) is investigated using tri-axial drained tests, in which an open source code LIGGGHTS is employed. The result shows that the critical state of granular materials is sensitive to the rotational resistance. With the increasing rotational friction coefficient (μ r ), the critical state stress increases evidently and the critical state line becomes higher in the e-log p’ plane. Microscopic parameters under different μ r are also analyzed, such as coordination number, anisotropy and contact force. The micro-structure changes are consistent with the macroscopic mechanical responses, and the relationships between them are explored and discussed.
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Chang, X., Wang, Y.T., Zhou, W., Ma, G., Liu, J.Y. (2017). The Influence of Rotational Resistance on Critical State of Granular Materials. In: Li, X., Feng, Y., Mustoe, G. (eds) Proceedings of the 7th International Conference on Discrete Element Methods. DEM 2016. Springer Proceedings in Physics, vol 188. Springer, Singapore. https://doi.org/10.1007/978-981-10-1926-5_26
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DOI: https://doi.org/10.1007/978-981-10-1926-5_26
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