{"title":"论球形尘埃聚集体在碰撞压缩中的弹塑性行为","authors":"Sota Arakawa, Hidekazu Tanaka, Eiichiro Kokubo, Satoshi Okuzumi, Misako Tatsuuma, Daisuke Nishiura, Mikito Furuichi","doi":"arxiv-2408.15573","DOIUrl":null,"url":null,"abstract":"Aggregates consisting of submicron-sized cohesive dust grains are ubiquitous,\nand understanding the collisional behavior of dust aggregates is essential. It\nis known that low-speed collisions of dust aggregates result in either sticking\nor bouncing, and local and permanent compaction occurs near the contact area\nupon collision. In this study, we perform numerical simulations of collisions\nbetween two aggregates and investigate their compressive behavior. We find that\nthe maximum compression length is proportional to the radius of aggregates and\nincreases with the collision velocity. We also reveal that a theoretical model\nof contact between two elastoplastic spheres successfully reproduces the size-\nand velocity-dependence of the maximum compression length observed in our\nnumerical simulations. Our findings on the plastic deformation of aggregates\nduring collisional compression provide a clue to understanding the collisional\ngrowth process of aggregates.","PeriodicalId":501270,"journal":{"name":"arXiv - PHYS - Geophysics","volume":"407 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"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\":\"arxiv-2408.15573\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Aggregates consisting of submicron-sized cohesive dust grains are ubiquitous,\\nand understanding the collisional behavior of dust aggregates is essential. It\\nis known that low-speed collisions of dust aggregates result in either sticking\\nor bouncing, and local and permanent compaction occurs near the contact area\\nupon collision. In this study, we perform numerical simulations of collisions\\nbetween two aggregates and investigate their compressive behavior. We find that\\nthe maximum compression length is proportional to the radius of aggregates and\\nincreases with the collision velocity. We also reveal that a theoretical model\\nof contact between two elastoplastic spheres successfully reproduces the size-\\nand velocity-dependence of the maximum compression length observed in our\\nnumerical simulations. Our findings on the plastic deformation of aggregates\\nduring collisional compression provide a clue to understanding the collisional\\ngrowth process of aggregates.\",\"PeriodicalId\":501270,\"journal\":{\"name\":\"arXiv - PHYS - Geophysics\",\"volume\":\"407 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-08-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv - PHYS - Geophysics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/arxiv-2408.15573\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Geophysics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2408.15573","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
On the elastoplastic behavior in collisional compression of spherical dust aggregates
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.