Influences of strain rate on mechanical behaviors of unsaturated and quasi-saturated loess under varying drainage conditions

Zhang, Tongwei; Li, Sheng; Lan, Hengxing; Zhang, Huyuan; Zhang, Fanyu

doi:10.1016/j.jrmge.2024.03.014

Journal of Rock Mechanics and Geotechnical Engineering

2024

DOI: 10.1016/j.jrmge.2024.03.014

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Influences of strain rate on mechanical behaviors of unsaturated and quasi-saturated loess under varying drainage conditions

Tongwei Zhang,

Sheng Li,

Hengxing Lan

et al.

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2024

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Static Properties of Kaolinite Samples from Different Structures and the Influence of Strain Rate

Xiao,

Ni,

Weng

et al. 2024

Applied Sciences

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This paper conducts triaxial undrained tests on flocculated and dispersed kaolin samples at strain rate range 0.005–1%/min to investigate the effects of structure and strain rate on shear strength. The test results show that the flocculated samples exhibit strain hardening behaviour, while the dispersed samples show strain softening behaviour. The strain rate sensitivity parameter reflects the degree to which shear strength increases with increasing strain rate. The structure affects the strain rate sensitivity parameter, with values of 4.79% and 2.31% for flocculated and dispersed samples, respectively. When the strain rate is 1%/min, due to the low permeability of the dispersed sample, the high strain rate causes a rapid increase in local pore pressure, while the postponed dissipation of excess pore pressure destroys the sample. When studying the influence of clay structure, it is important to use the same strain rate; otherwise, the differences in shear strength may be underestimated.

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Static Properties of Kaolinite Samples from Different Structures and the Influence of Strain Rate

Xiao,

Ni,

Weng

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

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Influences of strain rate on mechanical behaviors of unsaturated and quasi-saturated loess under varying drainage conditions

Cited by 1 publication

References 40 publications

Static Properties of Kaolinite Samples from Different Structures and the Influence of Strain Rate

Static Properties of Kaolinite Samples from Different Structures and the Influence of Strain Rate

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