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

Ashwin Rai; Nithya Subramanian; Aditi Chattopadhyay

doi:10.1117/12.2219432

18 April 2016 Investigation of piezo-resistivity in CNT nano-composites under damage

Ashwin Rai, Nithya Subramanian, Aditi Chattopadhyay

Proceedings Volume 9800, Behavior and Mechanics of Multifunctional Materials and Composites 2016; 980017 (2016) https://doi.org/10.1117/12.2219432
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2016, Las Vegas, Nevada, United States

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.

Citation Download Citation

Ashwin Rai, Nithya Subramanian, and Aditi Chattopadhyay "Investigation of piezo-resistivity in CNT nano-composites under damage", Proc. SPIE 9800, Behavior and Mechanics of Multifunctional Materials and Composites 2016, 980017 (18 April 2016); https://doi.org/10.1117/12.2219432

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available