Functionalising buckling for structural morphing in kinetic façades: Concepts, strategies and applications

Khezri, Mani; Rasmussen, Kim J.R.

doi:10.1016/j.tws.2022.109749

Cited by 7 publications

(1 citation statement)

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“…Soft actuators and sensors represent a groundbreaking field in modern engineering, with the ability to respond to various stimuli, including temperature [1,2], chemical triggers [3,4], and electric signals [5][6][7][8][9]. Dielectric actuators have emerged as a crucial player, driving many recent engineering marvels.…”

Section: Introductionmentioning

confidence: 99%

Semi-analytical modeling of electro-strictive behavior in dielectric elastomer tube actuators

Askari-Sedeh,

Baghani

2024

Phys. Scr.

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Dielectric elastomer tube actuators (DETAs) facilitate versatile soft robotic motions when activated by electric fields. However, optimizing their performance necessitates understanding complex deformation behaviors under different electrical loading patterns. While prior analytical models provide valuable insights, many rely on assumptions like infinite-length and uniform conditions, limiting their ability to capture experimentally-observed nonuniform deformations. This paper presents a semi-analytical approach permitting both radial and longitudinal electrostatic effects by modeling a dielectric tube of effectively infinite-length. It also incorporates the crucial compression-torsion behavior for soft actuator designs. We validate the model against finite element simulations, achieving excellent agreement. Our efficient technique successfully predicts intricate deformation phenomena in DETAs under combined electrical, mechanical, and geometric effects. Results show the model effectively captures axial and twisting deformations, overcoming limitations of linear twist angle assumptions. This analytical framework offers a powerful tool for optimizing next-generation soft actuators across diverse cutting-edge engineering and robotic applications.

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