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Stretch-Induced Bending of Soft Ribbed Strips
Emmanuel Siéfert1, Nicolas Cattaud2, Etienne Reyssat2
1Nonlinear Physical Chemistry Unit, Universit Libre de Bruxelles, B-1050 Bruxelles, Belgium.
Physical Review Letters
|November 1, 2021
Summary
Stretched ribbed elastic strips spontaneously curve and form tubes due to a bilayer effect from Poisson contraction. This controllable phenomenon offers potential for manufacturing small-scale tubular structures and grippers.
Area of Science:
- Materials Science
- Mechanical Engineering
- Soft Robotics
Background:
- Elastic strips with textured surfaces are being explored for novel applications.
- Understanding the mechanical behavior of architectured materials is crucial for design.
- Poisson contraction in stretched materials can induce complex shape changes.
Purpose of the Study:
- To investigate the spontaneous curvature and tube formation in ribbed elastic strips under tension.
- To analyze the influence of rib orientation and stretching strain on the material's morphology.
- To explore the potential applications of this phenomenon in manufacturing.
Main Methods:
- Experimental observation of ribbed elastic strips under tension.
- Analytical calculations to model the ribbon's morphology and transitions.
- Parametric study varying material properties, geometry, and strain.
Main Results:
- Ribbed elastic strips exhibit significant spontaneous curvature and can form tubes when stretched.
- A bilayer effect induced by Poisson contraction is the primary mechanism for bending.
- Curvature can be reversed by altering rib orientation, and buckling transitions are observed.
Conclusions:
- This study demonstrates a scale-independent method for creating tubular structures from single architectured materials.
- The controllable curvature and buckling behavior have implications for designing micro-grippers and soft robotic components.
- The findings provide a foundation for manufacturing advanced textured structures with tunable properties.
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