Granular Matter最新文献_第5页

Microscopic insights into thermal cycling effects in granular materials via X-ray microtomography 通过 X 射线显微层析技术从微观角度了解颗粒材料的热循环效应

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-10-01 DOI: 10.1007/s10035-024-01468-6

Yize Pan, Dawa Seo, Mark Rivers, Xiaohui Gong, Giuseppe Buscarnera, Alessandro F. Rotta Loria

{"title":"Microscopic insights into thermal cycling effects in granular materials via X-ray microtomography","authors":"Yize Pan, Dawa Seo, Mark Rivers, Xiaohui Gong, Giuseppe Buscarnera, Alessandro F. Rotta Loria","doi":"10.1007/s10035-024-01468-6","DOIUrl":"10.1007/s10035-024-01468-6","url":null,"abstract":"<div><p>The mechanics of granular materials at the macroscopic scale inherently depends on the particle interactions occurring at the microscopic scale. In recent decades, growing investigations have explored the mechanics of granular materials subjected to thermal cycles, as they involve complex responses that bear significance for science, engineering, and technology. However, the fundamental understanding of the mechanics of granular materials subjected to thermal cycles remains hindered by the absence of empirical evidence into the microscopic particle interactions that govern the macroscopic response of such materials. For the first time, this study presents direct experimental evidence obtained via synchrotron X-ray microtomography to reveal the behavior of the particles that constitute granular materials during thermal cycling. This work experimentally confirms the existing theory by which thermally induced particle interactions drive a macroscopic volumetric expansion and contraction of granular materials upon heating and cooling, respectively, and the development of irreversible volumetric deformations upon the completion of thermal cycles. The results uncover the evolution of particle non-uniform translations, rotations, and contact variations during thermal cycling, which all inherently depend on particle shape.</p></div>","PeriodicalId":49323,"journal":{"name":"Granular Matter","volume":"26 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142409306","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

Effect of particle shape on the void space in granular materials: implications for the properties of granular filters 颗粒形状对颗粒材料空隙的影响：对颗粒过滤器性能的影响

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-09-14 DOI: 10.1007/s10035-024-01452-0

Ali Abdallah, Eric Vincens, Hélène Magoariec, Mohsen Ardabilian, Christophe Picault

{"title":"Effect of particle shape on the void space in granular materials: implications for the properties of granular filters","authors":"Ali Abdallah, Eric Vincens, Hélène Magoariec, Mohsen Ardabilian, Christophe Picault","doi":"10.1007/s10035-024-01452-0","DOIUrl":"10.1007/s10035-024-01452-0","url":null,"abstract":"<div><p>This study investigates the influence of particle shape on the void space morphology and topology in granular materials. Numerical samples with spherical and ellipsoidal particle shapes were generated using the discrete element method. A segmentation algorithm was used to extract the pore space characteristics. The results reveal that particle shape significantly affects both constriction and pore sizes, with distinctive features according to flatness index or elongation ratio, the former being more significant than the latter. The obtained results were validated by conducting numerical filtration tests, which illustrated a direct correlation between the constriction properties derived from the pore space extraction and the blockage rate of fine particles in the filtration tests. The study revealed the importance of considering particle shape in filter design, emphasising its significant impact on pore space characteristics and filtration performance.</p><h3>Graphic abstract</h3>\u0000<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":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142252735","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

Flux atop an advancing slip face and the brink line curvature of barchan dunes 前进滑面顶部的通量和巴恰沙丘的边缘线曲率

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-09-13 DOI: 10.1007/s10035-024-01464-w

Jakob Leck

引用次数: 0

Numerical analysis of multi-scale mechanical theory of microfine magnesite powder molding 微细菱镁矿粉成型的多尺度力学理论数值分析

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-09-13 DOI: 10.1007/s10035-024-01466-8

Ruinan Zhang, Zhaoyang Liu, Songyang Pan, Lei Yuan, Tianpeng Wen, Jingkun Yu

{"title":"Numerical analysis of multi-scale mechanical theory of microfine magnesite powder molding","authors":"Ruinan Zhang, Zhaoyang Liu, Songyang Pan, Lei Yuan, Tianpeng Wen, Jingkun Yu","doi":"10.1007/s10035-024-01466-8","DOIUrl":"10.1007/s10035-024-01466-8","url":null,"abstract":"<div><p>This study presents a discrete element numerical model for the unidirectional compaction of microfine magnesite powder, designed to enhance the green body density based on laboratory apparatus configurations. The research demonstrated that as particle size decreased, porosity significantly reduced and density increased, resulting in a more uniform internal distribution within the green body. This led to closer particle contacts and an increased coordination number, which in turn intensified inter-particle interactions and the effectiveness of force transmission. During compaction, the distribution of force chains became more uniform, reducing localized stress concentrations and enhancing the mechanical integrity of the green body. The stress–strain relationship followed a polynomial pattern, highlighting the significant influence of particle size on the mechanical behavior during compaction. These findings provide a valuable theoretical basis for optimizing the compression molding process of microfine magnesite powder, facilitating the production of high-density, high-performance molded products.</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":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142195027","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

Flexible membrane boundary condition DEM-FEM for drained and undrained monotonic and cyclic triaxial tests 用于排水和不排水单调和循环三轴试验的柔性膜边界条件 DEM-FEM

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-09-13 DOI: 10.1007/s10035-024-01462-y

Tarek Mohamed, Jérôme Duriez, Guillaume Veylon, Laurent Peyras

{"title":"Flexible membrane boundary condition DEM-FEM for drained and undrained monotonic and cyclic triaxial tests","authors":"Tarek Mohamed, Jérôme Duriez, Guillaume Veylon, Laurent Peyras","doi":"10.1007/s10035-024-01462-y","DOIUrl":"10.1007/s10035-024-01462-y","url":null,"abstract":"<div><p>Accurate simulation of laboratory undrained and cyclic triaxial tests on granular materials using the Discrete Element Method (DEM) is a crucial concern. The evolution of shear bands and non-uniform stress distribution, affected by the membrane boundary condition, can significantly impact the mechanical behavior of samples. In this work, the flexible membrane is simulated by using the Finite Element Method coupled with DEM. In addition, we introduce a hydro-mechanical coupling scheme with a compressible fluid to reproduce the different undrained laboratory tests by using the membrane boundary. The evolution of pore pressure is computed incrementally based on the variation of volumetric strain inside the sample. The results of the membrane boundary condition are compared with more classical DEM simulations such as rigid wall and periodic boundaries. The comparison at different scales reveals many differences, such as the initial anisotropic value for a given preparation procedure, fabric evolution, volumetric strain and the formation of shear bands. Notably, the flexible boundary exhibits more benefits and better aligns with experimental data. As for the undrained condition, the results of the membrane condition are compared with experimental data of Toyoura sand and rigid wall boundary with constant volume. Finally, stress heterogeneity during undrained monotonic and cyclic conditions using the membrane boundary is highlighted.</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":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142195026","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

Experimental investigation of freeze–thaw effects on the micropore properties of expansive soil using NMR–SEM techniques 利用核磁共振-扫描电子显微镜技术对冻融效应对膨胀土微孔特性的影响进行实验研究

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-09-11 DOI: 10.1007/s10035-024-01465-9

Zhongnian Yang, Zhaochi Lu, Wei Shi, Huan He, Xinyi Nie, Xianzhang Ling, Jin Zhang, Da Guan

{"title":"Experimental investigation of freeze–thaw effects on the micropore properties of expansive soil using NMR–SEM techniques","authors":"Zhongnian Yang, Zhaochi Lu, Wei Shi, Huan He, Xinyi Nie, Xianzhang Ling, Jin Zhang, Da Guan","doi":"10.1007/s10035-024-01465-9","DOIUrl":"10.1007/s10035-024-01465-9","url":null,"abstract":"<div><p>The deformation of expansive soil in seasonally frozen regions caused by freeze–thaw cycles has severely affected the long-term performance of engineering applications. The alteration of expansive soil microstructure has resulted in many geotechnical engineering failures, such as soil cracking and settlement. Consequently, the micropore contraction and expansion mechanisms of expansive soil have drawn extensive attention. Nuclear Magnetic Resonance (NMR) is widely used as a rapid, non-destructive detection technique for moisture monitoring and microstructure evolution characterization in porous media. In addition, Magnetic Resonance Imaging (MRI) can visualize the migration pattern of pore water under different numbers of freeze–thaw cycles. SEM is the most effective and direct method to reveal the structure of particle and micropore arrangement. This paper investigates the pore size evolution and pore structure distribution characteristics of saturated expansive soil via 6 freeze–thaw cycle tests using NMR and SEM techniques. The evolution law of saturated expansive soil under freeze–thaw cycles is obtained. The results show that pore water migrates from the center to the periphery under freeze–thaw cycles. The pore size decreases as the number of freeze–thaw cycles increases and small particles increase significantly. During the freeze–thaw cycle, the arrangement pattern changed from surface-surface contact to stacking.</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":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142195028","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

On the elastoplastic behavior in collisional compression of spherical dust aggregates 论球形尘埃聚集体在碰撞压缩中的弹塑性行为

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-09-11 DOI: 10.1007/s10035-024-01463-x

Sota Arakawa, Hidekazu Tanaka, Eiichiro Kokubo, Satoshi Okuzumi, Misako Tatsuuma, Daisuke Nishiura, Mikito Furuichi

{"title":"On the elastoplastic behavior in collisional compression of spherical dust aggregates","authors":"Sota Arakawa, Hidekazu Tanaka, Eiichiro Kokubo, Satoshi Okuzumi, Misako Tatsuuma, Daisuke Nishiura, Mikito Furuichi","doi":"10.1007/s10035-024-01463-x","DOIUrl":"10.1007/s10035-024-01463-x","url":null,"abstract":"<div><p>Aggregates consisting of submicron-sized cohesive dust grains are ubiquitous, and understanding the collisional behavior of dust aggregates is essential. It is known that low-speed collisions of dust aggregates result in either sticking or bouncing, and local and permanent compaction occurs near the contact area upon collision. In this study, we perform numerical simulations of collisions between two aggregates and investigate their compressive behavior. We find that the maximum compression length is proportional to the radius of aggregates and increases with the collision velocity. We also reveal that a theoretical model of contact between two elastoplastic spheres successfully reproduces the size- and velocity-dependence of the maximum compression length observed in our numerical simulations. Our findings on the plastic deformation of aggregates during collisional compression provide a clue to understanding the collisional growth process of aggregates.\u0000</p><h3>Graphic abstract</h3>\u0000<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":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10035-024-01463-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142195062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scaling laws for quasi-statically deforming granular soil at critical state 临界状态下准静力变形粒状土的缩放定律

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-09-09 DOI: 10.1007/s10035-024-01459-7

Jianbo Fei, Hao Tang, Chaoshuai Yang, Xiangsheng Chen

引用次数: 0

Material parameter influence on the expression of impulse-induced surface dilation 材料参数对脉冲诱导表面扩张表达的影响

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-09-06 DOI: 10.1007/s10035-024-01460-0

Eric S. Frizzell, Christine M. Hartzell

引用次数: 0

Generation of granular media through 3D printing: a comparative evaluation from the morphological perspectives 通过 3D 打印生成颗粒介质：从形态学角度进行比较评估

IF 2.4 3区工程技术

Granular Matter Pub Date : 2024-09-03 DOI: 10.1007/s10035-024-01461-z

KV Anusree, Rizwan Khan, Gali Madhavi Latha

{"title":"Generation of granular media through 3D printing: a comparative evaluation from the morphological perspectives","authors":"KV Anusree, Rizwan Khan, Gali Madhavi Latha","doi":"10.1007/s10035-024-01461-z","DOIUrl":"10.1007/s10035-024-01461-z","url":null,"abstract":"<div><p>The generation of artificial granular media to investigate micro-to-macro correlations in sands is one of the innovations inspired by the recent advancements in 3D printing technology. While several 3D printing techniques exist to print granular particles, the basis for the selection of a specific technique and the relative accuracy in mimicking the morphological features are yet to be investigated. This paper investigates the accuracy of the reproduction of granular morphology by three widely used 3D printing techniques. Polyjet, Digital Light Processing (DLP), and Stereolithography (SLA) printing techniques are used to generate the analogues of reference sand particles of size range 1.76–6.39 mm. Subsequently, the 3D morphological indices of the printed grains are computed using X-ray micro-computed tomography (µCT) imaging followed by spherical harmonic (SH) particle reconstruction and computational analysis. These indices are compared with those of the reference particles, and the errors in the computed morphological parameters are obtained for the three different 3D printing techniques. The errors are found to be the lowest for polyjet-printed particles and the highest for SLA-printed particles. The accuracy of the reproduction of morphology is found to increase with an increase in the particle size.</p></div>","PeriodicalId":49323,"journal":{"name":"Granular Matter","volume":"26 4","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142195061","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