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Proceedings Paper

Investigation of piezo-resistivity in CNT nano-composites under damage
Author(s): Ashwin Rai; Nithya Subramanian; Aditi Chattopadhyay
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Paper 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.

Paper Details

Date Published: 18 April 2016
PDF: 11 pages
Proc. SPIE 9800, Behavior and Mechanics of Multifunctional Materials and Composites 2016, 980017 (18 April 2016); doi: 10.1117/12.2219432
Show Author Affiliations
Ashwin Rai, Arizona State Univ. (United States)
Nithya Subramanian, Arizona State Univ. (United States)
Aditi Chattopadhyay, Arizona State Univ. (United States)

Published in SPIE Proceedings Vol. 9800:
Behavior and Mechanics of Multifunctional Materials and Composites 2016
Nakhiah C. Goulbourne, Editor(s)

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