Structural properties and mechanical behavior of three-dimensional cylindrical particle-like systems under in situ loading

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2024-10-16 DOI:10.1016/j.powtec.2024.120365

YanJi Gu , FanXiu Chen , Yang Yu , Chao Cui , Yuan Zhang , JingLan Liu , ZiMing Qiu

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Abstract

To investigate the mechanical behavior of granular systems and their impact on density uniformity during compression, a three-dimensional micro-CT in situ loading experiment was conducted on a cylindrical granular system. The granular system was subjected to tomographic scanning and reconstruction, and the variation patterns of structural parameters such as volume fraction, porosity, and intrinsic density during the in situ loading process were analyzed. Internal pores within the granular system were extracted to obtain changes in pore area at each layer, allowing for an analysis of the evolving patterns of layered pore areas across different regions of the granular system during loading. This characterization elucidated the dynamic evolution process of compaction within the granular system. A contact network model for the granular system was established using particle contact area as a representation of inter-particle contact forces, revealing inherent connections between particle contact networks and macroscopic mechanical behaviors within the granular system.

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原位加载下三维圆柱形类粒子系统的结构特性和力学行为

为了研究颗粒体系的力学行为及其在压缩过程中对密度均匀性的影响，对圆柱形颗粒体系进行了三维微计算机断层扫描原位加载实验。对颗粒系统进行了断层扫描和重建，分析了原位加载过程中体积分数、孔隙率和固有密度等结构参数的变化规律。通过提取颗粒系统内部的孔隙，可以获得各层孔隙面积的变化，从而分析加载过程中颗粒系统不同区域分层孔隙面积的演变模式。这种特征描述阐明了颗粒系统内部压实的动态演变过程。利用颗粒接触面积表示颗粒间的接触力，建立了颗粒系统的接触网络模型，揭示了颗粒接触网络与颗粒系统内宏观机械行为之间的内在联系。

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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.