Document Type

Article

Publication Version

Submitted Manuscript

Publication Date

1-2014

Journal or Book Title

Smart Materials and Structures

Volume

23

Issue

4

First Page

1

Last Page

21

DOI

10.1088/0964-1726/23/4/045023

Abstract

The authors have recently developed two novel solutions for strain sensing using nanocomposite materials. While they both aim at providing cost-effective solutions for the monitoring of local information on large-scale structures, the technologies are different in their applications and physical principles. One sensor is made of a cementitious material, which could make it suitable for embedding within the core of concrete structures prior to casting, and is a resistor, consisting of a carbon nanotube cement-based transducer. The other sensor can be used to create an external sensing skin and is a capacitor, consisting of a flexible conducting elastomer fabricated from a nanocomposite mix, and deployable in a network setup to cover large structural surfaces. In this paper, we advance the understanding of nanocomposite sensing technologies by investigating the potential of both novel sensors for the dynamic monitoring of civil structures. First, an in-depth dynamic characterization of the sensors using a uniaxial test machine is conducted. Second, their performance at dynamic monitoring of a full-scale concrete beam is assessed, and compared against off-the-shelf accelerometers. Experimental results show that both novel technologies compare well against mature sensors at vibration-based structural health monitoring, showing the promise of nanocomposite technologies for the monitoring of large-scale structural systems.

Comments

This is a manuscript of an article from Smart Materials and Structures. 2014; 23(4); 045023. Doi: 10.1088/0964-1726/23/4/045023. Posted with permission.

Copyright Owner

IOP Publishing Ltd

Language

en

File Format

application/pdf