Capturing the helical to spiral transitions in thin ribbons of nematic elastomers

Tomassetti, Giuseppe; Varano, Valerio

doi:10.1007/s11012-017-0631-3

Cited by 16 publications

(14 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This will be attempted in future work. We refer the reader to [26] for further discussion of spiral ribbon vs. helicoid-like shapes in thin sheets of nematic elastomers.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Dimension reduction via $$\Gamma $$ Γ -convergence for soft active materials

Agostiniani

DeSimone

2017

Meccanica

View full text Add to dashboard Cite

Abstract. We present a rigorous derivation of dimensionally reduced theories for thin sheets of nematic elastomers, in the finite bending regime. Focusing on the case of twist nematic texture, we obtain 2D and 1D models for wide and narrow ribbons exhibiting spontaneous flexure and torsion. We also discuss some variants to the case of twist nematic texture, which lead to 2D models with different target curvature tensors. In particular, we analyse cases where the nematic texture leads to zero or positive Gaussian target curvature, and the case of bilayers.

show abstract

“…This will be attempted in future work. We refer the reader to [26] for further discussion of spiral ribbon vs. helicoid-like shapes in thin sheets of nematic elastomers.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Dimension reduction via $$\Gamma $$ Γ -convergence for soft active materials

Agostiniani

DeSimone

2017

Meccanica

View full text Add to dashboard Cite

show abstract

“…This behavior resembles that of a seedpod and can be explained by the domination of the bending energy (in the narrow case) or the stretching energy (in the wide case) as discussed in Section 2.1 . Quantitative models capturing the transition from helical to spiral structure in a TNE ribbon have also been proposed [ 87 , 88 ]. In the narrow case, temperature variation will change the twist pitch (p T ) of the helicoid ( Figure 6 c).…”

Section: Helical Structures Mimicking the Opening Of Baumentioning

confidence: 99%

Helical Structures Mimicking Chiral Seedpod Opening and Tendril Coiling

Wan

Jin

Trase

et al. 2018

Sensors

View full text Add to dashboard Cite

Helical structures are ubiquitous in natural and engineered systems across multiple length scales. Examples include DNA molecules, plants’ tendrils, sea snails’ shells, and spiral nanoribbons. Although this symmetry-breaking shape has shown excellent performance in elastic springs or propulsion generation in a low-Reynolds-number environment, a general principle to produce a helical structure with programmable geometry regardless of length scales is still in demand. In recent years, inspired by the chiral opening of Bauhinia variegata’s seedpod and the coiling of plant’s tendril, researchers have made significant breakthroughs in synthesizing state-of-the-art 3D helical structures through creating intrinsic curvatures in 2D rod-like or ribbon-like precursors. The intrinsic curvature results from the differential response to a variety of external stimuli of functional materials, such as hydrogels, liquid crystal elastomers, and shape memory polymers. In this review, we give a brief overview of the shape transformation mechanisms of these two plant’s structures and then review recent progress in the fabrication of biomimetic helical structures that are categorized by the stimuli-responsive materials involved. By providing this survey on important recent advances along with our perspectives, we hope to solicit new inspirations and insights on the development and fabrication of helical structures, as well as the future development of interdisciplinary research at the interface of physics, engineering, and biology.

show abstract

“…This behavior resembles that of a seedpod and can be explained by the domination of the bending energy (in the narrow case) or the stretching energy (in the wide case) as discussed in section 2.1. Quantitative models capturing the transition from helical to spiral structure in a TNE ribbon have also been proposed [69,70]. In the narrow case, temperature variation will change the twist pitch (pT) of the helicoid (Figure 5c).…”

Section: Ph Responsive Hydrogelsmentioning

confidence: 99%

Helical Actuators Inspired by Chiral Seedpod Opening and Tendril Coiling

Wan¹,

Jin²,

Trase³

et al. 2018

Preprint

View full text Add to dashboard Cite

Actuators are essential components for intelligent machines that can fulfill certain tasks in response to environmental stimuli. In recent years, actuators that can transform from a 2D ribbon shape to a 3D helical configuration under certain external stimuli have attracted significant attention due to the potential applications of the targeted helical structures in springs, propulsion generation, and artificial muscles. Inspired by the chiral opening of Bauhinia variegate‘s seedpods and the coiling of the Towel Gourd tendril with perversions, researchers have made significant breakthroughs in synthesizing state-of-the-art actuators capable of mimicking helical transformations. In this review, we give a brief overview of the shape evolution mechanisms of these two plant structures and then review recent progress in the fabrication of biomimetic helical actuators. These structures are categorized by the stimuli-responsive materials involved, including hydrogels, liquid crystal networks/elastomers, shape memory polymers, and multiwall carbon nanotubes. By providing this survey on important recent advances along with our perspectives, we hope to solicit new inspirations and insights on the development and fabrication of smart actuators, as well as the future development of interdisciplinary research at the interface of physics, engineering, and biology.

show abstract

Capturing the helical to spiral transitions in thin ribbons of nematic elastomers

Cited by 16 publications

References 32 publications

Dimension reduction via $$\Gamma $$ Γ -convergence for soft active materials

Dimension reduction via $$\Gamma $$ Γ -convergence for soft active materials

Helical Structures Mimicking Chiral Seedpod Opening and Tendril Coiling

Helical Actuators Inspired by Chiral Seedpod Opening and Tendril Coiling

Contact Info

Product

Resources

About