Wei Zhang, Weijian Xiao, Chuanniu Yuan, Xu Gong, Bozhan Hai, Rongxin Chen, Kun Liu
{"title":"3D DEM investigation on percolation of lubricant particles during uniaxial metal powder compaction","authors":"Wei Zhang, Weijian Xiao, Chuanniu Yuan, Xu Gong, Bozhan Hai, Rongxin Chen, Kun Liu","doi":"10.1007/s10035-024-01430-6","DOIUrl":null,"url":null,"abstract":"<p>Based on the discrete element method, a 3D particle size model including MoS<sub>2</sub> lubricant and iron powder particles has been used to simulate the powder compaction process. The percolation behavior of sidewall lubricant particles and the influence of lubricant percolation on the powder densification and force chain parameters (quantity, average length, average strength, and angle) has been studied. Results indicated that the degree of percolation increased with the increase in pressure. Lubricants located at the top of the model are more prone to percolation. The lubricant percolation behavior causes the pores in the compact to become larger, and minimize the coordination number and compactness of the compact. Although the percolation behavior can generate more high-strength short force chains, it can lead to a high concentration of spatial angles of the force chains, hindering the formation of cross force chain networks.</p>","PeriodicalId":49323,"journal":{"name":"Granular Matter","volume":"26 3","pages":""},"PeriodicalIF":2.4000,"publicationDate":"2024-04-18","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/s10035-024-01430-6","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
Based on the discrete element method, a 3D particle size model including MoS2 lubricant and iron powder particles has been used to simulate the powder compaction process. The percolation behavior of sidewall lubricant particles and the influence of lubricant percolation on the powder densification and force chain parameters (quantity, average length, average strength, and angle) has been studied. Results indicated that the degree of percolation increased with the increase in pressure. Lubricants located at the top of the model are more prone to percolation. The lubricant percolation behavior causes the pores in the compact to become larger, and minimize the coordination number and compactness of the compact. Although the percolation behavior can generate more high-strength short force chains, it can lead to a high concentration of spatial angles of the force chains, hindering the formation of cross force chain networks.
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.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
