On the elastoplastic behavior in collisional compression of spherical dust aggregates
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arXiv
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| Format: | Preprint |
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2024
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| author | Arakawa, Sota Tanaka, Hidekazu Kokubo, Eiichiro Okuzumi, Satoshi Tatsuuma, Misako Nishiura, Daisuke Furuichi, Mikito |
| author_facet | Arakawa, Sota Tanaka, Hidekazu Kokubo, Eiichiro Okuzumi, Satoshi Tatsuuma, Misako Nishiura, Daisuke Furuichi, Mikito |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_15573 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | On the elastoplastic behavior in collisional compression of spherical dust aggregates Arakawa, Sota Tanaka, Hidekazu Kokubo, Eiichiro Okuzumi, Satoshi Tatsuuma, Misako Nishiura, Daisuke Furuichi, Mikito Soft Condensed Matter Earth and Planetary Astrophysics Geophysics 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. |
| title | On the elastoplastic behavior in collisional compression of spherical dust aggregates |
| topic | Soft Condensed Matter Earth and Planetary Astrophysics Geophysics |
| url | https://arxiv.org/abs/2408.15573 |