Not a Rolling Stone: On Dragging a Stone Weight-Anchor on the Seabed
The force required to drag a stone anchor over several types of surfaces was measured, recorded, and analyzed. It was found that the force involved in the movement of the anchor over the various surfaces cannot be described just by the sliding solids theory, but it involves several additional physic...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Journal of Marine Science and Engineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-1312/12/2/248 |
| _version_ | 1827343425734705152 |
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| author | Yoav Me-Bar Ayelet Miller Baruch Ephraim Karlin Deborah Cvikel |
| author_facet | Yoav Me-Bar Ayelet Miller Baruch Ephraim Karlin Deborah Cvikel |
| author_sort | Yoav Me-Bar |
| collection | DOAJ |
| description | The force required to drag a stone anchor over several types of surfaces was measured, recorded, and analyzed. It was found that the force involved in the movement of the anchor over the various surfaces cannot be described just by the sliding solids theory, but it involves several additional physical processes, such as increasing the sand shear strength by the pressure the anchor applies on the sand under it; the sinking of the anchor into the saturated sand; shearing the sand in front of the moving anchor and accelerating it to the velocity of the anchor; accumulating sand in front of the anchor, thus adding to the pulled mass; and moving some of the accumulated sand sideways. In many instances, the beginning of the anchor movement involves the liquefaction of the sand under it, thus enabling the relatively easier sliding of the anchor. In addition, movement over rocky surfaces, encountering the irregularities that abound on such surfaces, also differs from classic sliding friction theory. In several situations, the use of an effective coefficient of friction, combining all the processes, can serve to obtain approximate values of the required forces. |
| first_indexed | 2024-03-07T22:26:05Z |
| format | Article |
| id | doaj.art-ce1940ae2c404fd999cbb7e2ea84c504 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-07T22:26:05Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-ce1940ae2c404fd999cbb7e2ea84c5042024-02-23T15:23:05ZengMDPI AGJournal of Marine Science and Engineering2077-13122024-01-0112224810.3390/jmse12020248Not a Rolling Stone: On Dragging a Stone Weight-Anchor on the SeabedYoav Me-Bar0Ayelet Miller1Baruch Ephraim Karlin2Deborah Cvikel3The Leon Recanati Institute for Maritime Studies, University of Haifa, Haifa 3498838, IsraelDepartment of Maritime Civilizations, University of Haifa, Haifa 3498838, IsraelIndependent Researcher, Haifa 3452413, IsraelThe Leon Recanati Institute for Maritime Studies, University of Haifa, Haifa 3498838, IsraelThe force required to drag a stone anchor over several types of surfaces was measured, recorded, and analyzed. It was found that the force involved in the movement of the anchor over the various surfaces cannot be described just by the sliding solids theory, but it involves several additional physical processes, such as increasing the sand shear strength by the pressure the anchor applies on the sand under it; the sinking of the anchor into the saturated sand; shearing the sand in front of the moving anchor and accelerating it to the velocity of the anchor; accumulating sand in front of the anchor, thus adding to the pulled mass; and moving some of the accumulated sand sideways. In many instances, the beginning of the anchor movement involves the liquefaction of the sand under it, thus enabling the relatively easier sliding of the anchor. In addition, movement over rocky surfaces, encountering the irregularities that abound on such surfaces, also differs from classic sliding friction theory. In several situations, the use of an effective coefficient of friction, combining all the processes, can serve to obtain approximate values of the required forces.https://www.mdpi.com/2077-1312/12/2/248frictioncoefficient of frictiondragging on sandliquefactionsand shear strengthstone anchor |
| spellingShingle | Yoav Me-Bar Ayelet Miller Baruch Ephraim Karlin Deborah Cvikel Not a Rolling Stone: On Dragging a Stone Weight-Anchor on the Seabed Journal of Marine Science and Engineering friction coefficient of friction dragging on sand liquefaction sand shear strength stone anchor |
| title | Not a Rolling Stone: On Dragging a Stone Weight-Anchor on the Seabed |
| title_full | Not a Rolling Stone: On Dragging a Stone Weight-Anchor on the Seabed |
| title_fullStr | Not a Rolling Stone: On Dragging a Stone Weight-Anchor on the Seabed |
| title_full_unstemmed | Not a Rolling Stone: On Dragging a Stone Weight-Anchor on the Seabed |
| title_short | Not a Rolling Stone: On Dragging a Stone Weight-Anchor on the Seabed |
| title_sort | not a rolling stone on dragging a stone weight anchor on the seabed |
| topic | friction coefficient of friction dragging on sand liquefaction sand shear strength stone anchor |
| url | https://www.mdpi.com/2077-1312/12/2/248 |
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