Granular Matter最新文献_第4页

Construction of granular aggregates with different porosity, shape, and size distributions 制造具有不同孔隙率、形状和粒度分布的颗粒集料

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-11-09 DOI: 10.1007/s10035-024-01477-5

Emmanuel N. Millán, M. Belén Planes, Eduardo M. Bringa, M. Gabriela Parisi

{"title":"Construction of granular aggregates with different porosity, shape, and size distributions","authors":"Emmanuel N. Millán, M. Belén Planes, Eduardo M. Bringa, M. Gabriela Parisi","doi":"10.1007/s10035-024-01477-5","DOIUrl":"10.1007/s10035-024-01477-5","url":null,"abstract":"<p>Granular matter is characterized by a collection of grains, where the collective behavior relies on interactions among all constituent particles, generally including both cohesive and dissipative interactions. Understanding and predicting granular behavior is pivotal for both basic science and technological applications, ranging from astrophysics to geology, cereal storage, and cosmetics development. The structure of these aggregates varies depending on the environment but often involves a highly porous configuration. In this study, we introduce our AGregate GENeration Tool (AGGENT) specifically designed for constructing granular aggregates with varying levels of porosity, shapes, and grain sizes. The software facilitates aggregate generation using JKR or DMT cohesive models with a finite grain overlap, enabling the achievement of highly homogeneous aggregates. The behavior of porosity of the generated samples near surfaces is also discussed. These generated samples can subsequently be utilized for performing various simulations, allowing for further analysis of granular behavior under different conditions of interest, including transport, mechanical and thermal properties, etc.</p>","PeriodicalId":49323,"journal":{"name":"Granular Matter","volume":"27 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Macroscopic effects of intraparticle fracture, grain topology and shape on vehicle dynamics and mobility over gravel road beds 颗粒内断裂、颗粒拓扑结构和形状对车辆在砾石路面上的动力学和流动性的宏观影响

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-11-07 DOI: 10.1007/s10035-024-01469-5

Debdeep Bhattacharya, Robert Lipton

引用次数: 0

Fluid-soil interaction analysis for jet grouting in sands based on numerical simulation 基于数值模拟的砂中喷射灌浆的流体-土壤相互作用分析

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-11-06 DOI: 10.1007/s10035-024-01480-w

Kai Wang, Zhao-Ping Li, Hao Zheng, Qing-Bo Li

{"title":"Fluid-soil interaction analysis for jet grouting in sands based on numerical simulation","authors":"Kai Wang, Zhao-Ping Li, Hao Zheng, Qing-Bo Li","doi":"10.1007/s10035-024-01480-w","DOIUrl":"10.1007/s10035-024-01480-w","url":null,"abstract":"<div><p>Jet grouting is a geotechnical consolidation technique commonly used to improve soil mechanicals. Despite its successful applications, understanding micro-level interactions between the jet and soil is incomplete. This paper utilizes the Smoothed Particle Hydrodynamics (SPH) and Arbitrary Lagrangian-Eulerian (ALE) methods to simulate fluid-soil interactions in both non-submerged and submerged environments. Analysis covers the flow fields and soil erosion. Findings show erosion velocity remains steady in non-submerged conditions, with the jet compacting and flushing soil. In submerged conditions, the simulated jet flow field under soil constraint is similar to that in the free submerged conditions. However, influenced by soil deformation, damage, and the backflow of the slurry, the jet flow field under soil constraint displays distinct features. For instance, velocity distributions in certain cross-sections cannot be accurately described by normal distribution, and axial velocity distribution curves exhibit different partitions compared to free submerged jet theory. Comparative simulations vary jet pressures, grout water-cement ratios, and soil compactness to analyze the erosion process. It is found that jet pressure significantly affects the depth of the erosion pit. The limit erosion distance in ALE simulations were compared with theoretical values derived from an established theory, and a model experiment was also conducted to analyze the jet-grouted diameter at different left speeds and rotational speeds of rod. The results show that ALE method can offer high accuracy in predicting the jet-grouted diameter and proves to be a feasible approach for fluid-soil interaction simulations in jet grouting.</p></div>","PeriodicalId":49323,"journal":{"name":"Granular Matter","volume":"27 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced interlocking in granular jamming grippers through hard and soft particle mixtures 通过软硬颗粒混合物增强颗粒干扰抓取器的互锁性

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-10-30 DOI: 10.1007/s10035-024-01475-7

Angel Santarossa, Thorsten Pöschel

引用次数: 0

Determination of discrete element method (DEM) simulation parameters for polymeric waste particles 离散元素法（DEM）聚合物废物颗粒模拟参数的确定

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-10-21 DOI: 10.1007/s10035-024-01474-8

Alessio Martignoni, Lorenzo Iorio, Matteo Strano

{"title":"Determination of discrete element method (DEM) simulation parameters for polymeric waste particles","authors":"Alessio Martignoni, Lorenzo Iorio, Matteo Strano","doi":"10.1007/s10035-024-01474-8","DOIUrl":"10.1007/s10035-024-01474-8","url":null,"abstract":"<div><p>Plastic consumption is on the rise, particularly in Europe, where million tonnes are produced each year, with only 10% recovered. Optimizing the recycling processes in all its phases is vital. Understanding particle movement in some components of the plastic recycling plants can be addressed by the Discrete Element Method (DEM). The characterization of DEM materials is often performed through the study of the angle of repose (AoR). This study aims to advance DEM simulation of shredded polymeric waste, proposing a scaling and calibration procedure of the relevant simulation parameters. A total of six distinct types of polymeric particles, with different shape and size, have been characterized in this study, measuring their density, their shape estimators, their size distribution and their angle of repose. The AoR has been measured through a hollow cylinder lifting test. First, sensitivity analyses have been performed to establish a suitable range for the numerical parameters and to reduce the dimensionality of the problem. Then, the scaling and calibration procedure is described and tested on the six batches. The proposed procedure allows to predict very well the AoR, with an error below 1%, and the other geometrical variables of a heap, although it deteriorates in fully predicting its shape when the sphericity of the particles decreases.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":49323,"journal":{"name":"Granular Matter","volume":"26 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142453076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical simulation of gas penetration and powder compression during high-pressure dynamic load in silo 筒仓高压动态负载期间气体渗透和粉末压缩的数值模拟

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-10-17 DOI: 10.1007/s10035-024-01471-x

Minghao You, Xin Wang, Xiaofei Mao, Xuanyi Liu, Xuewen Zeng, Cai Liang, Jiliang Ma, Xiaoping Chen

{"title":"Numerical simulation of gas penetration and powder compression during high-pressure dynamic load in silo","authors":"Minghao You, Xin Wang, Xiaofei Mao, Xuanyi Liu, Xuewen Zeng, Cai Liang, Jiliang Ma, Xiaoping Chen","doi":"10.1007/s10035-024-01471-x","DOIUrl":"10.1007/s10035-024-01471-x","url":null,"abstract":"<div><p>The powder consolidation and equipment damage caused by frequent pressurization of the lock hopper silo seriously affect stable powder discharge and transportation. This paper investigated the powder compression and gas permeation characteristics during the silo pressurization by experiment and simulation. The spherical glass powder and irregularly shaped coal powder were selected as the granular materials. The modified drag model agrees well with the experiments for spatial pressure cumulative distribution and full-process pressure drop. The coal powder has a higher average compression ratio than the glass powder. The local porosity of the powder layer experiences two stages of rapid decrease and slow stabilization. The powder compression arises from particle rearrangement and bed pore structure reconstruction under airflow disturbance. The nonlinear growth of pressure accumulation curves at different spatial points in the early stage of silo pressurization forms a fusiform envelope surface. As the average pressure-increasing rate increases, the peak gas pressure gradient of the powder layer increases approximately linearly. The penetration time difference of glass powder between powder layers I and V is less than 1 s, while that of coal powder is close to 4 s. There was a significant time hysteresis effect for gas penetration in the coal powder silo.</p><h3>Graphic abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":49323,"journal":{"name":"Granular Matter","volume":"26 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142443354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The role of granular matter in additive manufacturing 颗粒物质在增材制造中的作用

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-10-10 DOI: 10.1007/s10035-024-01473-9

Sudeshna Roy, Thomas Weinhart

引用次数: 0

A discrete element study on sand response to cyclic loading: macro-micro perspectives 离散元素研究：砂对循环加载的响应：宏观与微观视角

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-10-09 DOI: 10.1007/s10035-024-01467-7

Alice Ezzeddine, Bogdan Cazacliu, Patrick Richard, Luc Thorel, Riccardo Artoni

{"title":"A discrete element study on sand response to cyclic loading: macro-micro perspectives","authors":"Alice Ezzeddine, Bogdan Cazacliu, Patrick Richard, Luc Thorel, Riccardo Artoni","doi":"10.1007/s10035-024-01467-7","DOIUrl":"10.1007/s10035-024-01467-7","url":null,"abstract":"<p>The discrete element method (DEM) is used to simulate the behavior of a model sand under cyclic stress. Two approaches are employed in the contact model to account for the effect of anisotropic particle shape: (1) spheres with a rolling resistance moment and (2) clumps of spheres. Model parameters are calibrated using experimental results from drained monotonic triaxial tests on NE34 sand. Then, a series of cyclic triaxial tests is done on a homogeneous elementary volume sample with varying density index (<span>(I_D)</span>) and cyclic stress ratio (CSR). Both macroscopic and micromechanical characteristics of the material are examined under cyclic loads. In particular, the evolution of Young’s modulus (<i>E</i>) and the damping ratio (<i>D</i>) with strain amplitude are evaluated at varying <span>(I_D)</span> and compared with values from the literature. An analysis of the coordination number (<i>Z</i>), orientation of strong and weak contact forces, friction mobilization, sliding contacts and fabric evolution links the observed macroscopic behavior of energy dissipation to the phenomenon of frictional sliding at the grain scale.</p>","PeriodicalId":49323,"journal":{"name":"Granular Matter","volume":"26 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142411074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the micromechanical origin of shear response in granular materials induced by size non-uniformity 探索粒状材料在粒度不均匀性诱导下产生剪切响应的微观机械起源

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-10-08 DOI: 10.1007/s10035-024-01472-w

Yang Li, Yang Dong, Haoran Jiang, Zhenming Shi

{"title":"Exploring the micromechanical origin of shear response in granular materials induced by size non-uniformity","authors":"Yang Li, Yang Dong, Haoran Jiang, Zhenming Shi","doi":"10.1007/s10035-024-01472-w","DOIUrl":"10.1007/s10035-024-01472-w","url":null,"abstract":"<p>This study investigates the role of particle size distribution (PSD) in the shear response of granular materials using discrete element modeling (DEM). Three series of DEM samples, two gap-graded and one continuously graded, are prepared under different initial packing densities and sheared quasi-statically to the critical state. The DEM results indicate that the PSD crucially influences the macroscopic stress at the peak state but does not have an impact on it at the critical state. Microscopically, the PSD affects the granular structure and causes significant inhomogeneity in the contact network. The origin of the phenomenological observations can be traced through the stress-force-fabric analysis. At the peak state, it is found that the anisotropy in normal contact force, which is stronger with wider polydispersity, plays the predominant role in determining the overall stress response. When the particles have rearranged sufficiently upon shearing at the critical state, the geometric part of anisotropy starts showing dependence on the PSD and compensates for the mechanical part of anisotropy, thereby leading to an independence of overall stress on size non-uniformity.</p>","PeriodicalId":49323,"journal":{"name":"Granular Matter","volume":"26 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142410651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of triaxial loading of segregated granular assemblies through experiments and DEM simulations 通过实验和 DEM 模拟研究离析颗粒组合体的三轴加载问题

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-10-04 DOI: 10.1007/s10035-024-01470-y

Venkata Rama Manoj Pola, Ratna Kumar Annabattula

引用次数: 0