Journal article
Physics-based dynamic model for the electro-thermal actuation of bio-inspired twisted spiral artificial muscles (TSAMs)
Polymer (Guilford), Vol.222, p.123642
04/22/2021
DOI: 10.1016/j.polymer.2021.123642
Abstract
The reversible texture modulation behavior of cephalopods is driven by cutaneous muscles known as papillae. These papillae lead to the generation of complex dynamic 3D shapes on the skin of cephalopods that allows them to camouflage to their surroundings and optimize swimming efficiency by reducing the hydrodynamic drag. In a recent work, we developed Twisted Spiral Artificial Muscles (TSAMs) that mimic the behavior of papillae muscles. TSAMs are flat Archimedean spirals manufactured from inexpensive polymer fishing lines, able to provide output strains of almost 2000% with an input voltage of only 0.02 V/mm. In this study we extend the simple actuation static model proposed in our previous work to a physics-based dynamic model that describes the time varying electro-thermal actuation of TSAMs. The proposed model is experimentally validated on two types of TSAMs and excellent agreement is observed between the theoretical and experimental results. The proposed model is able to predict the dynamic vertical displacement of TSAMs from the value of the input voltage, given the geometrical, thermal, and electrical properties of the source materials. This model is essential to tailor the actuation and control of TSAMs and TSAMs-based smart devices such as self-morphing skins, and smart 3D displays.
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•Physics-based dynamic model for the Electro-thermal actuation of bio-inspired twisted spiral artificial muscles (TSAMs).•TSAMs are modelled using a second-order spring-mass-damper system.•Excellent agreement is observed between theoretical and experimental results for two types of TSAMs.•sA sensitivity analysis highlights the model parameters that most influence the performance of the TSAM.
Details
- Title: Subtitle
- Physics-based dynamic model for the electro-thermal actuation of bio-inspired twisted spiral artificial muscles (TSAMs)
- Creators
- Parth Kotak - University of IowaThilina Weerakkody - University of IowaCaterina Lamuta - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Polymer (Guilford), Vol.222, p.123642
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/j.polymer.2021.123642
- ISSN
- 0032-3861
- eISSN
- 1873-2291
- Grant note
- DOI: 10.13039/100000006, name: Office of Naval Research
- Language
- English
- Date published
- 04/22/2021
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984196518302771
Metrics
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