Electromechanical modelling of a new class of nanocomposite cement-based sensors for structural health monitoring

Antonella D’Alessandro, Filippo Ubertini, Annibale Luigi Materazzi, Simon Laflamme, Maurizio Porfiri

Research output: Contribution to journalArticle

Abstract

This work focuses on the analysis of a new nanocomposite cement-based sensor (carbon nanotube cement-based sensor), for applications in vibration-based structural health monitoring of civil engineering structures. The sensor is constituted of a cement paste doped with multi-walled carbon nanotubes, so that mechanical deformations produce a measurable change of the electrical resistance. Prior work of some of the authors has addressed the fabrication process, dynamic behaviour and implementation to full-scale structural components. Here, we investigate the effectiveness of a linear lumped-circuit electromechanical model, in which dynamic sensing is associated with a strain-dependent modulation of the internal resistance. Salient circuit parameters are identified from a series of experiments where the distance between the electrodes is parametrically varied. Experimental results indicate that the lumped-circuit model is capable of accurately predicting the step response to a voltage input and its steady-state response to a harmonic uniaxial deformation. Importantly, the model is successful in anticipating the presence of a superharmonic component in sensor’s output.

Original languageEnglish (US)
Pages (from-to)137-147
Number of pages11
JournalStructural Health Monitoring
Volume14
Issue number2
DOIs
StatePublished - Mar 26 2015

Fingerprint

Nanocomposites
Carbon Nanotubes
Structural health monitoring
Cements
Sensors
Health
Ointments
Vibration
Electric Impedance
Networks (circuits)
Carbon nanotubes
Electrodes
Step response
Acoustic impedance
Civil engineering
Modulation
Fabrication
Electric potential
Experiments

Keywords

  • Carbon nanotubes
  • electromechanical model
  • nanotechnology
  • smart materials
  • smart sensors
  • structural health monitoring

ASJC Scopus subject areas

  • Mechanical Engineering
  • Biophysics

Cite this

Electromechanical modelling of a new class of nanocomposite cement-based sensors for structural health monitoring. / D’Alessandro, Antonella; Ubertini, Filippo; Materazzi, Annibale Luigi; Laflamme, Simon; Porfiri, Maurizio.

In: Structural Health Monitoring, Vol. 14, No. 2, 26.03.2015, p. 137-147.

Research output: Contribution to journalArticle

D’Alessandro, Antonella ; Ubertini, Filippo ; Materazzi, Annibale Luigi ; Laflamme, Simon ; Porfiri, Maurizio. / Electromechanical modelling of a new class of nanocomposite cement-based sensors for structural health monitoring. In: Structural Health Monitoring. 2015 ; Vol. 14, No. 2. pp. 137-147.
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