Dynamic Buckling of an Elastic Ring in a Soap Film.

Author: 

Box, F
Kodio, O
O'Kiely, D
Cantelli, V
Goriely, A
Vella, D

Publication Date: 

13 May 2020

Journal: 

Physical review letters

Last Updated: 

2020-11-15T01:41:53.8+00:00

Issue: 

19

Volume: 

124

DOI: 

10.1103/physrevlett.124.198003

page: 

198003-

abstract: 

Dynamic buckling may occur when a load is rapidly applied to, or removed from, an elastic object at rest. In contrast to its static counterpart, dynamic buckling offers a wide range of accessible patterns depending on the parameters of the system and the dynamics of the load. To study these effects, we consider experimentally the dynamics of an elastic ring in a soap film when part of the film is suddenly removed. The resulting change in tension applied to the ring creates a range of interesting patterns that cannot be easily accessed in static experiments. Depending on the aspect ratio of the ring's cross section, high-mode buckling patterns are found in the plane of the remaining soap film or out of the plane. Paradoxically, while inertia is required to observe these nontrivial modes, the selected pattern does not depend on inertia itself. The evolution of this pattern beyond the initial instability is studied experimentally and explained through theoretical arguments linking dynamics to pattern selection and mode growth. We also explore the influence of dynamic loading and show numerically that, by imposing a rate of loading that competes with the growth rate of instability, the observed pattern can be selected and controlled.

Symplectic id: 

959373

Submitted to ORA: 

Submitted

Publication Type: 

Journal Article