Pulling an intruder from a granular material: a novel depinning experiment
Two-dimensional impact experiments by Clark et al. [2] identified the source of inertial drag to be caused by ‘collisions’ with a latent force network, leading to large fluctuations of the force experienced by the impactor. These collisions provided the major drag on an impacting intruder until the...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2017-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://doi.org/10.1051/epjconf/201714003040 |
| _version_ | 1818348219251294208 |
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| author | Zhang Yue Behringer Robert |
| author_facet | Zhang Yue Behringer Robert |
| author_sort | Zhang Yue |
| collection | DOAJ |
| description | Two-dimensional impact experiments by Clark et al. [2] identified the source of inertial drag to be caused by ‘collisions’ with a latent force network, leading to large fluctuations of the force experienced by the impactor. These collisions provided the major drag on an impacting intruder until the intruder was nearly at rest. As a complement, we consider controlled pull-out experiments where a buried intruder is pulled out of a material, starting from rest. This provides a means to better understand the non-inertial part of the drag force, and to explore the mechanisms associated with the force fluctuations. To some extent, the pull out process is a time reversed version of the impact process. In order to visualize this pulling process, we use 2D photoelastic disks from which circular intruders of different radii are pulled out. We present results about the dynamics of the intruder and the structures of the force chains inside the granular system as captured by slow and high speed imaging. |
| first_indexed | 2024-12-13T17:46:34Z |
| format | Article |
| id | doaj.art-78c371cca75f45d38b3c745f291c81ea |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-13T17:46:34Z |
| publishDate | 2017-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-78c371cca75f45d38b3c745f291c81ea2022-12-21T23:36:37ZengEDP SciencesEPJ Web of Conferences2100-014X2017-01-011400304010.1051/epjconf/201714003040epjconf162298Pulling an intruder from a granular material: a novel depinning experimentZhang Yue0Behringer Robert1Department of Physics and Center for Nonlinear and Complex Systems, Duke UniversityDepartment of Physics and Center for Nonlinear and Complex Systems, Duke UniversityTwo-dimensional impact experiments by Clark et al. [2] identified the source of inertial drag to be caused by ‘collisions’ with a latent force network, leading to large fluctuations of the force experienced by the impactor. These collisions provided the major drag on an impacting intruder until the intruder was nearly at rest. As a complement, we consider controlled pull-out experiments where a buried intruder is pulled out of a material, starting from rest. This provides a means to better understand the non-inertial part of the drag force, and to explore the mechanisms associated with the force fluctuations. To some extent, the pull out process is a time reversed version of the impact process. In order to visualize this pulling process, we use 2D photoelastic disks from which circular intruders of different radii are pulled out. We present results about the dynamics of the intruder and the structures of the force chains inside the granular system as captured by slow and high speed imaging.https://doi.org/10.1051/epjconf/201714003040 |
| spellingShingle | Zhang Yue Behringer Robert Pulling an intruder from a granular material: a novel depinning experiment EPJ Web of Conferences |
| title | Pulling an intruder from a granular material: a novel depinning experiment |
| title_full | Pulling an intruder from a granular material: a novel depinning experiment |
| title_fullStr | Pulling an intruder from a granular material: a novel depinning experiment |
| title_full_unstemmed | Pulling an intruder from a granular material: a novel depinning experiment |
| title_short | Pulling an intruder from a granular material: a novel depinning experiment |
| title_sort | pulling an intruder from a granular material a novel depinning experiment |
| url | https://doi.org/10.1051/epjconf/201714003040 |
| work_keys_str_mv | AT zhangyue pullinganintruderfromagranularmaterialanoveldepinningexperiment AT behringerrobert pullinganintruderfromagranularmaterialanoveldepinningexperiment |