Infinite penetration of a projectile into a granular medium.
| Autor: | Pacheco-Vázquez F; CINVESTAV-Monterrey, PIIT, Nuevo León, 66600, Mexico. fpacheco@mda.cinvestav.mx, Caballero-Robledo GA, Solano-Altamirano JM, Altshuler E, Batista-Leyva AJ, Ruiz-Suárez JC |
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| Jazyk: | angličtina |
| Zdroj: | Physical review letters [Phys Rev Lett] 2011 May 27; Vol. 106 (21), pp. 218001. Date of Electronic Publication: 2011 May 25. |
| DOI: | 10.1103/PhysRevLett.106.218001 |
| Abstrakt: | An object falling in a fluid reaches a terminal velocity when the drag force and its weight are balanced. Contrastingly, an object impacting into a granular medium rapidly dissipates all its energy and comes to rest always at a shallow depth. Here we study, experimentally and theoretically, the penetration dynamics of a projectile in a very long silo filled with expanded polystyrene particles. We discovered that, above a critical mass, the projectile reaches a terminal velocity and, therefore, an endless penetration. (© 2011 American Physical Society) |
| Databáze: | MEDLINE |
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