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Research Article | Open Access

Friction characteristics of confined inflatable structures

Eduardo M. SOSA1( ), Gregory J. THOMPSON2, Ever J. BARBERO2, Subhadeep GHOSH1, Kevin L. PEIL2
Department of Civil and Environmental Engineering, West Virginia University, Morgantown, WV 26506-6103, USA
Department of Mechanical and Aerospace Engineering, West Virginia University, Morgantown, WV 26506-6106, USA
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Abstract

The availability of high-strength fabrics and progress in the development of large-scale inflatable technology made possible the creation of temporary and quickly deployable structures for protection of underground infrastructure. Inflatable structures are relatively lightweight and portable, and can maintain the required rigidity while in operation. These benefits have prompted the development of inflatable structures for use in confined spaces, such as tunnels and large-diameter pipes to act as barriers for containing flooding with minimal infrastructure modification. This work presents experimental results obtained from the evaluation of frictional characteristics of the fabric material that constitute the structural membrane of confined inflatable structures developed for protection of underground transportation tunnels and other large conduits. Friction tests at coupon level and slippage tests in a reduced-scale inflatable structure were performed in order to evaluate the frictional characteristics of Vectran webbings. Tests at coupon level were performed to determine the friction coefficient for different surface types and conditions. Tests with the reduced-scale inflatable structure contributed to the understanding of the friction characteristics at system level when subjected to different pressurization or depressurization sequences designed to induce slippage. Test results indicate that friction coefficient values at coupon level are about 29 percent higher than values derived from reduced-scale tests.

Keywords

frictionfabric materialsinflatable structuresslippageVectran

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Friction
Volume 2 Issue 4,
December 2014
Pages 365-390
DOI: 10.1007/s40544-014-0069-8
Cite this article:
SOSA EM, THOMPSON GJ, BARBERO EJ, et al. Friction characteristics of confined inflatable structures. Friction, 2014, 2(4): 365-390. https://doi.org/10.1007/s40544-014-0069-8

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Received: 10 June 2014
Revised: 26 September 2014
Accepted: 14 November 2014
Published: 12 December 2014
© The author(s) 2014

This article is published with open access at Springerlink.com

Open Access: This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
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