eprintid: 10094059 rev_number: 13 eprint_status: archive userid: 608 dir: disk0/10/09/40/59 datestamp: 2020-06-24 11:30:08 lastmod: 2020-06-24 11:30:08 status_changed: 2020-06-24 11:30:08 type: article metadata_visibility: show creators_name: Bigoni, D creators_name: Dal Corso, F creators_name: Misseroni, D creators_name: Bosi, F title: Torsional locomotion ispublished: pub divisions: UCL divisions: A01 divisions: B04 divisions: C05 divisions: F45 note: © 2014 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. abstract: One edge of an elastic rod is inserted into a friction-less and fitting socket head, whereas the other edge is subjected to a torque, generating a uniform twisting moment. It is theoretically shown and experimentally proved that, although perfectly smooth, the constraint realizes an expulsive axial force on the elastic rod, which amount is independent of the shape of the socket head. The axial force explains why screwdrivers at high torque have the tendency to disengage from screw heads and demonstrates torsional locomotion along a perfectly smooth channel. This new type of locomotion finds direct evidence in the realization of a ‘torsional gun’, capable of transforming torque into propulsive force. date: 2014-11-08 date_type: published publisher: ROYAL SOC official_url: https://doi.org/10.1098/rspa.2014.0599 oa_status: green full_text_type: pub language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 1513036 doi: 10.1098/rspa.2014.0599 lyricists_name: Bosi, Federico lyricists_id: FBOSI73 actors_name: Bosi, Federico actors_id: FBOSI73 actors_role: owner full_text_status: public publication: Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences volume: 470 number: 2171 pages: 7 issn: 1471-2946 citation: Bigoni, D; Dal Corso, F; Misseroni, D; Bosi, F; (2014) Torsional locomotion. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences , 470 (2171) 10.1098/rspa.2014.0599 <https://doi.org/10.1098/rspa.2014.0599>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10094059/1/Torsional%20locomotion.pdf