ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Role of Fiber Orientations in the Mechanics of Bioinspired Fiber-Reinforced Elastomers

Chatterjee, A and Chahare, NR and Kondaiah, P and Gundiah, N (2021) Role of Fiber Orientations in the Mechanics of Bioinspired Fiber-Reinforced Elastomers. In: Soft Robotics, 8 (6). pp. 640-650.

Full text not available from this repository.
Official URL: https://doi.org/10.1089/soro.2019.0191


Fiber reinforcement is a crucial attribute of soft-bodied muscular hydrostats that have the ability to undergo large deformations and maintain their posture. Helically wound fibers around the cylindrical worm body help control the tube diameter and length. Geometric considerations show that a fiber winding angle of 54.7°, called the magic angle, results in a maximum enclosed volume. Few studies have combined both experimental and theoretical techniques to explore the effects of fiber winding at varied angles on the large deformation mechanics of fiber-reinforced elastomers (FRE). We fabricated FRE materials in transversely isotropic layouts varying from 0° to 90° using a custom filament winding technique and characterized the nonlinear stress-strain relationships using uniaxial and equibiaxial experiments. We used these data within a continuum mechanical framework to propose a novel constitutive model for incompressible FRE materials with embedded extensible fibers. The model includes individual contributions from the matrix and fibers in addition to coupled terms in strain invariants, I1 and I4. The deviatoric stress components show inversion at fiber orientation angles near the magic angle in the FRE composites. These results are useful in soft robotic applications and in the biomechanics of fiber-reinforced tissues such as the myocardium, arteries, and skin.

Item Type: Journal Article
Publication: Soft Robotics
Publisher: Mary Ann Liebert Inc.
Additional Information: The copyright for this article belongs to the Authors.
Keywords: Continuum mechanics; Deformation; Elastomers; Fiber reinforced materials; Fibers; Filament winding; Reinforced plastics; Reinforcement; Stress-strain curves, Elastomer materials; Fiber reinforcement (e); Fiber winding; Fibre orientation; Fibre-reinforced; Hydrostatic skeleton; Larger deformations; Magic angle; Reinforced elastomers; Transverse isotropy, Constitutive models, elastomer, anisotropy; artery; biomechanics; mechanical stress, Anisotropy; Arteries; Biomechanical Phenomena; Elastomers; Stress, Mechanical
Department/Centre: Division of Biological Sciences > Molecular Reproduction, Development & Genetics
Division of Interdisciplinary Sciences > Centre for Biosystems Science and Engineering
Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 09 Nov 2023 05:59
Last Modified: 09 Nov 2023 05:59
URI: https://eprints.iisc.ac.in/id/eprint/82810

Actions (login required)

View Item View Item