Haleh Meshkinghalam, Mehrdad Emami Tabrizi, Mohammad Reza Chenaghlou
{"title":"Influence of the contact model on energy fluctuations in non-cohesive granular materials subjected to confinement axial cyclic loading using DEM","authors":"Haleh Meshkinghalam, Mehrdad Emami Tabrizi, Mohammad Reza Chenaghlou","doi":"10.1007/s10035-024-01478-4","DOIUrl":null,"url":null,"abstract":"<div><p>The discrete element method (DEM) is widely used to investigate the micromechanical behavior of granular materials. The accuracy of numerical modelling using this method depends greatly on the correct selection of the components of the rheological model. On the other hand, the rheological model is affected by the geometric shape, movement, and constituent particular materials. In this study, the stored and dissipated energy variations in the granular media in linear and non-linear contact models, as well as the change of the damping coefficient at the contact points under cyclic loading, were studied. The numerical model with linear and non-linear contact models was studied in four cases including the application of the normal and shear damping coefficient, and both normal and shear dashpots with the same and different values. The results showed that in the linear contact model, when the damping coefficient was applied only in the normal direction, the energy level was lower than the other three cases. However, in the non-linear model, all four cases had almost the same behavior. In the linear model, the amount of dissipated energy due to viscous damping was more than dissipated energy due to the friction sliding. However, in the non-linear model, dissipated energy due to sliding was more than the dissipated energy due to viscous damping.</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":"27 1","pages":""},"PeriodicalIF":2.4000,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Granular Matter","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10035-024-01478-4","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The discrete element method (DEM) is widely used to investigate the micromechanical behavior of granular materials. The accuracy of numerical modelling using this method depends greatly on the correct selection of the components of the rheological model. On the other hand, the rheological model is affected by the geometric shape, movement, and constituent particular materials. In this study, the stored and dissipated energy variations in the granular media in linear and non-linear contact models, as well as the change of the damping coefficient at the contact points under cyclic loading, were studied. The numerical model with linear and non-linear contact models was studied in four cases including the application of the normal and shear damping coefficient, and both normal and shear dashpots with the same and different values. The results showed that in the linear contact model, when the damping coefficient was applied only in the normal direction, the energy level was lower than the other three cases. However, in the non-linear model, all four cases had almost the same behavior. In the linear model, the amount of dissipated energy due to viscous damping was more than dissipated energy due to the friction sliding. However, in the non-linear model, dissipated energy due to sliding was more than the dissipated energy due to viscous damping.
期刊介绍：
Although many phenomena observed in granular materials are still not yet fully understood, important contributions have been made to further our understanding using modern tools from statistical mechanics, micro-mechanics, and computational science.
These modern tools apply to disordered systems, phase transitions, instabilities or intermittent behavior and the performance of discrete particle simulations.
>> Until now, however, many of these results were only to be found scattered throughout the literature. Physicists are often unaware of the theories and results published by engineers or other fields - and vice versa.
The journal Granular Matter thus serves as an interdisciplinary platform of communication among researchers of various disciplines who are involved in the basic research on granular media. It helps to establish a common language and gather articles under one single roof that up to now have been spread over many journals in a variety of fields. Notwithstanding, highly applied or technical work is beyond the scope of this journal.
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