Investigation of piezo-resistivity in CNT nano-composites under damage

Ashwin Rai, Nithya Subramanian, Aditi Chattopadhyay

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

The piezoresistivity of carbon nanotube (CNT) reinforced nanocomposites is modeled using a multiscale damage modeling technique. Two phenomena of piezoresistivity are studied, the inherent piezoresistivity of the CNTs and the electrical tunneling effect. The damage model is developed under the framework of continuum damage mechanics (CDM) with a physical damage evolution equation inspired by Molecular Dynamics (MD) simulations. This damage model is applied to a nanocomposite unit cells with randomly dispersed CNTs. Orders of magnitude change in piezoresistivity is observed as the nanocomposite changes from non-damaged state to damaged state. This study provides insights into the prevailing mechanisms associated with piezoresistivity in the damaged and undamaged state of the CNT reinforced nanocomposites at the sub micro scale.

Original languageEnglish (US)
Title of host publicationBehavior and Mechanics of Multifunctional Materials and Composites 2016
PublisherSPIE
Volume9800
ISBN (Electronic)9781510600416
DOIs
StatePublished - 2016
EventBehavior and Mechanics of Multifunctional Materials and Composites 2016 - Las Vegas, United States
Duration: Mar 21 2016Mar 23 2016

Other

OtherBehavior and Mechanics of Multifunctional Materials and Composites 2016
CountryUnited States
CityLas Vegas
Period3/21/163/23/16

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Keywords

  • Carbon Nanotubes
  • Damage Mechanics
  • Molecular Dynamics
  • Multiscale Modeling

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

Rai, A., Subramanian, N., & Chattopadhyay, A. (2016). Investigation of piezo-resistivity in CNT nano-composites under damage. In Behavior and Mechanics of Multifunctional Materials and Composites 2016 (Vol. 9800). [980017] SPIE. https://doi.org/10.1117/12.2219432