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Early Damage Detection in Composite Materials Using Inkjet-Printed Carbon Nanotube Sensors


Title: Early Damage Detection in Composite Materials Using Inkjet-Printed Carbon Nanotube Sensors

Authors: Joshua DeGraff, Marquese Pollard, Jerry Horne, Richard Liang

DOI: 10.33599/nasampe/c.22.0109

Abstract: The miniaturization and versatility of high-resolution sensing devices in composites will be critical to adopting structural health monitoring (SHM) and the Internet of Things (IoT) for heightened system awareness. This research introduces the potential for a miniaturized and passive sensor that can detect and distinguish impact events; assess impact damage; and integrate into pre-existing composite structures. In this work, a carbon nanotube thin film, known as Buckypaper (CNT-BP), is exploited for its robust electromechanical coupling and piezoresistivity to detect stresses and potential deterioration. Carbon nanotube networks have already displayed their ability as strain sensors; however, CNT-BP sensors can potentially enhance the sensitivity of SHM systems by detecting the stresses that precede structural deformations. For example, the sensor can detect direct and indirect impacts that have traditionally been obscure. Impact tests on glass fiber composite panels reveal the ability to detect and assess the severity of impact events with the potential for real-time damage assessment. By employing inkjet-printed circuitry to the fabrication process, CNT-BP sensors in this research are lightweight, flexible, and scalable for various materials and applications. By enhancing SHM with impact sensing, future catastrophes of composite structures can be avoided; structural designs and integrity can be validated and trusted for engineering applications.

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Conference: CAMX 2022

Publication Date: 2022/10/17

SKU: TP22-0000000109

Pages: 11

Price: $22.00

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