The concept of a ‘deformable arm scale’ (completelydifferent from a traditional rigid arm balance)istheoreticallyintroducedandexperimentallyvalidated. The idea is not intuitive, but is the resultof nonlinear equilibrium kinematics of rods inducingconfigurational forces, so that deflection of the armsbecomes necessary for equilibrium, which would beimpossible for a rigid system. In particular, the rigidarms of usual scales are replaced by a flexible elasticlamina, free to slide in a frictionless and inclinedsliding sleeve, which can reach a unique equilibriumconfiguration when two vertical dead loads areapplied. Prototypes designed to demonstrate thefeasibility of the system show a high accuracy inthe measurement of load within a certain range ofuse. Finally, we show that the presented results arestrongly related to snaking of confined beams, withimplications for locomotion of serpents, plumbingand smart oil drilling.

An Elastica Arm Scale / Bosi, Federico; Misseroni, Diego; Dal Corso, Francesco; Bigoni, Davide. - In: PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON. SERIES A. - ISSN 1364-5021. - 470:(2014), pp. 20140232.1-20140232.10. [10.1098/rspa.2014.0232]

An Elastica Arm Scale

Bosi, Federico;Misseroni, Diego;Dal Corso, Francesco;Bigoni, Davide
2014

Abstract

The concept of a ‘deformable arm scale’ (completelydifferent from a traditional rigid arm balance)istheoreticallyintroducedandexperimentallyvalidated. The idea is not intuitive, but is the resultof nonlinear equilibrium kinematics of rods inducingconfigurational forces, so that deflection of the armsbecomes necessary for equilibrium, which would beimpossible for a rigid system. In particular, the rigidarms of usual scales are replaced by a flexible elasticlamina, free to slide in a frictionless and inclinedsliding sleeve, which can reach a unique equilibriumconfiguration when two vertical dead loads areapplied. Prototypes designed to demonstrate thefeasibility of the system show a high accuracy inthe measurement of load within a certain range ofuse. Finally, we show that the presented results arestrongly related to snaking of confined beams, withimplications for locomotion of serpents, plumbingand smart oil drilling.
Bosi, Federico; Misseroni, Diego; Dal Corso, Francesco; Bigoni, Davide
An Elastica Arm Scale / Bosi, Federico; Misseroni, Diego; Dal Corso, Francesco; Bigoni, Davide. - In: PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON. SERIES A. - ISSN 1364-5021. - 470:(2014), pp. 20140232.1-20140232.10. [10.1098/rspa.2014.0232]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/114525
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