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The elastica sling

Authors :
Cazzolli, Alessandro
Corso, Francesco Dal
Source :
European Journal of Mechanics / A Solids (2024), 105: 105273
Publication Year :
2024

Abstract

The nonlinear mechanics of a flexible elastic rod constrained at its edges by a pair of sliding sleeves is analyzed. The planar equilibrium configurations of this variable-length elastica are found to have shape defined only by the inclination of the two constraints, while their distance is responsible only for scaling the size. By extending the theoretical stability criterion available for systems under isoperimetric constraints to the case of variable domains, the existence of no more than one stable equilibrium solution is revealed. The set of sliding sleeves' inclination pairs for which the stability is lost are identified. Such critical conditions allow the indefinite ejection of the flexible rod from the sliding sleeves, thus realizing an elastica sling. Finally, the theoretical findings are validated by experiments on a physical prototype. The present results lead to a novel actuation principle that may find application as a mechanism in energy harvesting, wave mitigation devices, and soft robotic locomotion.

Details

Database :
arXiv
Journal :
European Journal of Mechanics / A Solids (2024), 105: 105273
Publication Type :
Report
Accession number :
edsarx.2409.12075
Document Type :
Working Paper
Full Text :
https://doi.org/10.1016/j.euromechsol.2024.105273