サイトウ クニヤス   Kuniyasu Saitoh
  齊藤 国靖
   所属   京都産業大学  理学部 物理科学科
   職種   准教授
言語種別 英語
発行・発表の年月 2015
形態種別 研究論文
査読 査読あり
標題 A Master equation for the probability distribution functions of forces in soft particle packings
執筆形態 その他
掲載誌名 Soft Matter
出版社・発行元 ROYAL SOC CHEMISTRY
巻・号・頁 11(7),pp.1253-1258
著者・共著者 Saitoh, K.,Magnanimo, V.,Luding, S.
概要 We study the microscopic response of force-chain networks in jammed soft particles to quasi-static isotropic (de) compressions by molecular dynamics simulations. We show that not only contacts but also interparticle gaps between the nearest neighbors must be considered for the stochastic evolution of the probability distribution functions (PDFs) of forces, where the mutual exchange of contacts and interparticle gaps, i.e. opening and closing contacts, are also crucial to the incremental system behavior. By numerically determining the transition rates for all changes of contacts and gaps, we formulate a Master equation for the PDFs of forces, where the insight one gets from the transition rates is striking: the mean change of forces reflects non-affine system responses, while their fluctuations obey uncorrelated Gaussian statistics. In contrast, interparticle gaps react mostly affine in average, but imply multi-scale correlations according to a much wider stable distribution function.
DOI 10.1039/c4sm02452d
ISSN 1744-683X/1744-6848
Put Code(ORCID) 64873719
PermalinkURL http://www.scopus.com/inward/record.url?eid=2-s2.0-84922646689&partnerID=MN8TOARS
researchmap用URL http://orcid.org/0000-0002-3511-2710