Frictional mechanisms of hydrated montmorillonite under normal loading

Wei, Pengchang; Zheng, Yuanyuan; Zaoui, Ali

doi:10.1016/j.compgeo.2024.106568

Computers and Geotechnics

2024

DOI: 10.1016/j.compgeo.2024.106568

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Frictional mechanisms of hydrated montmorillonite under normal loading

Pengchang Wei,

Yuanyuan Zheng,

Ali Zaoui

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2024

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Cited by 2 publications

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Atomistic origin of montmorillonite clay subjected to freeze-thaw hysteresis

Wei,

Yin,

Yao

et al. 2024

Journal of Rock Mechanics and Geotechnical Engineering

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Atomistic origin of montmorillonite clay subjected to freeze-thaw hysteresis

Wei,

Yin,

Yao

et al. 2024

Journal of Rock Mechanics and Geotechnical Engineering

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Influence of Hydration Film on the Frictional Behavior of Montmorillonite: Insights into Microscopic Mechanics of Layered Minerals

Du,

Zhou,

Shen

et al. 2024

J. Phys. Chem. C

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Hydration lubrication plays a significant role in reducing sliding friction in various moving systems, from geological faults to molecular materials systems, but the mechanism of lubrication on microscopic friction remains poorly understood. In this study, through molecular dynamics simulation, the dependence of the shear stress on normal stress was investigated across varying water contents to illuminate the influence of hydration lubrication on microscopic friction. Our findings reveal that the adhesive force between mineral layers is jointly governed by hydration film transition and H-bond characteristics, subsequently governing the friction at the microscale. The variation of the microscopic friction coefficient with water content shows two distinct stages, with a critical transition from a 2-layer to 3-layer water structure altering their correlation from positive to negative. These insights provide a substantial contribution to understanding the fundamental mechanism of hydration lubrication, opening new avenues for exploration in the domain of microscopic friction.

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Frictional mechanisms of hydrated montmorillonite under normal loading

Cited by 2 publications

References 72 publications

Atomistic origin of montmorillonite clay subjected to freeze-thaw hysteresis

Atomistic origin of montmorillonite clay subjected to freeze-thaw hysteresis

Influence of Hydration Film on the Frictional Behavior of Montmorillonite: Insights into Microscopic Mechanics of Layered Minerals

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