Universal features of the stick-slip dynamics of an intruder moving through a confined granular medium
Experiments and simulations of an intruder dragged by a spring through a two-dimensional annulus of granular material exhibit robust force fluctuations. At low packing fractions ( ϕ < ϕ 0 ), the intruder clears an open channel. Above ϕ 0 , stick-slip dynamics develop, with an average energy relea...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2022 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/212845 |
| Acceso en línea: | http://hdl.handle.net/11336/212845 |
| Access Level: | acceso abierto |
| Palabra clave: | GRANULAR MATERIALS JAMMING GRANULAR FLOWS CREEP https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| Sumario: | Experiments and simulations of an intruder dragged by a spring through a two-dimensional annulus of granular material exhibit robust force fluctuations. At low packing fractions ( ϕ < ϕ 0 ), the intruder clears an open channel. Above ϕ 0 , stick-slip dynamics develop, with an average energy release that is independent of the particle-particle and particle-base friction coefficients but does depend on the width W of the annulus and the diameter D of the intruder. A simple model predicts the dependence of ϕ 0 on W and D , allowing for a data collapse for the average energy release as a function of ϕ / ϕ 0 . These results pose challenges for theories of mechanical failure in amorphous materials. |
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