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Asymptotic self-restabilization of a continuous elastic structure

Bosi, F; Misseroni, D; Dal Corso, F; Neukirch, S; Bigoni, D; (2016) Asymptotic self-restabilization of a continuous elastic structure. Physical Review E , 94 (6) , Article 063005. 10.1103/PhysRevE.94.063005. Green open access

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Abstract

A challenge in soft robotics and soft actuation is the determination of an elastic system that spontaneously recovers its trivial path during postcritical deformation after a bifurcation. The interest in this behavior is that a displacement component spontaneously cycles around a null value, thus producing a cyclic soft mechanism. An example of such a system is theoretically proven through the solution of the elastica and a stability analysis based on dynamic perturbations. It is shown that the asymptotic self-restabilization is driven by the development of a configurational force, of similar nature to the Peach-Koehler interaction between dislocations in crystals, which is derived from the principle of least action. A proof-of-concept prototype of the discovered elastic system is designed, realized, and tested, showing that this innovative behavior can be obtained in a real mechanical apparatus.

Type: Article
Title: Asymptotic self-restabilization of a continuous elastic structure
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevE.94.063005
Publisher version: http://doi.org/10.1103/PhysRevE.94.063005
Language: English
Additional information: ©2016 American Physical Society. This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10039774
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