Mechanical Characterisation of Woven Pneumatic Active Textile

Abstract

Active textiles have shown promising applications in soft robotics owing to their tunable stiffness and design flexibility. Given the breadth of the design space for planar and spatial arrangements of these woven structures, a rigorous and generalizable characterisation of these systems is not yet available. In order to characterize the response of a stereotypical woven pattern to actuation, we undertake a parametric study of plain weave active fabrics and characterise their mechanical properties in accordance with the relevant ISO standards for varying muscle densities and both monotonically increasing/decreasing pressures. Tensile and flexural tests were undertaken on five plain weave samples made of a nylon 6 (polyamide) warp and EM20 McKibben S-muscle weft, for input pressures ranging from 0.00 MPa to 0.60 MPa, at three muscle densities, namely 100 m−1 , 74.26 m−1 and 47.62 m−1 . Contrary to intuition, we find that a lower muscle density has a more prominent impact on the thickness, but a significantly lesser one on length, highlighting a critical dependency on the relative orientation among the loading, the passive textile and the muscle filaments. Hysteretic behaviour as large as 10% of the longitudinal contraction is observed on individual filaments and woven textiles, and its onset is identified in the shear between the rubber tube and the outer sleeve of the artificial muscle. Hysteresis is shown to be muscle density-dependent and responsible for a strongly asymmetrical response upon different pressure inputs. These findings provide new insights into the mechanical properties of active textiles with tunable stiffness, and may contribute to future developments in wearable technologies and biomedical devices.

Publication DOI: https://doi.org/10.1109/LRA.2023.3262177
Divisions: College of Engineering & Physical Sciences > School of Engineering and Technology > Mechanical, Biomedical & Design
College of Engineering & Physical Sciences > Engineering for Health
College of Engineering & Physical Sciences > Smart and Sustainable Manufacturing
Additional Information: Copyright © 2023 Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The final version of record can be found at here: https://doi.org/10.1109/LRA.2023.3262177
Uncontrolled Keywords: Hydraulic/Pneumatic Actuators,ISO Standards,Muscles,Protocols,Robot sensing systems,Robots,Soft Robot Materials and Design,Textiles,Wearable Robotics,Weaving,Control and Systems Engineering,Biomedical Engineering,Human-Computer Interaction,Mechanical Engineering,Computer Vision and Pattern Recognition,Computer Science Applications,Control and Optimization,Artificial Intelligence
Publication ISSN: 2377-3766
Last Modified: 11 Apr 2024 07:20
Date Deposited: 04 Apr 2023 08:31
Full Text Link: https://ieeexpl ... cument/10081469
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PURE Output Type: Article
Published Date: 2023-05
Published Online Date: 2023-03-27
Accepted Date: 2023-03-17
Authors: Marshall, Ruby
Souppez, Jean-Baptiste R. G. (ORCID Profile 0000-0003-0217-5819)
Khan, Mariya
Viola, Ignazio Maria
Nabae, Hiroyuki
Suzumori, Koichi
Stokes, Adam
Giorgio-Serchi, Francesco

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