环剪试验中不均匀分布颗粒材料的剪切特性及其对滑坡的影响

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2024-09-30 DOI:10.1016/j.powtec.2024.120332

Suran Wang , Yao Lu , Yu Huang , Rafig Azzam

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引用次数: 0

摘要

了解滑坡土的剪切行为对理解滑坡动力学非常重要。本研究利用玻璃珠环剪试验研究了基土颗粒材料的剪切行为。对不同粒径和分布的样本进行了研究，以探索粒径如何影响不同剪切速度下的剪切行为。对样品的分析包括对剪切应力、位移-剪切应力波动以及剪切应力标准偏差变化的评估。结果表明，随着剪切位移的增加，剪切应力波动趋于稳定。颗粒大小差异越大，颗粒混合越均匀，剪切应力标准偏差越小。相反，当较小的颗粒占主导地位时，颗粒混合就不那么均匀，从而导致较高的剪切应力标准偏差。此外，本研究还讨论了样品在大位移剪切作用下的剪切扩张和压实机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Shear characteristics of nonuniform distribution of granular materials in ring shear test and impact on landslides

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Shear characteristics of nonuniform distribution of granular materials in ring shear test and impact on landslides

Knowledge of the shear behavior of landslide soil is very important for understanding landslide dynamics. This study investigated the shear behavior of base soil particle materials using ring shear tests with glass beads. Samples with varying particle sizes and distributions were examined to explore how particle size affects shear behavior at different shear velocities. Analysis of the samples included assessment of shear stress, displacement-shear stress fluctuations, and changes in the shear stress standard deviation. Results showed that with increasing shear displacement, shear stress fluctuations stabilize. Rather large difference particle size differences lead to more uniform particle mixing and a lower shear stress standard deviation. Conversely, when smaller particles predominate, particle mixing is less uniform, resulting in a higher shear stress standard deviation. Additionally, this study discussed the shear dilation and compaction mechanisms of samples under large displacement shear.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.