Health self-monitoring of nano-engineered composite structures with enhanced mechanical and electrical profiles

Yehai Li, Yaozhong Liao, Zhongqing Su

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic researchpeer-review

Abstract

Inclusion of conductive nanoparticles in conventional fiber-reinforced composites can improve material properties and endow the composites with functionalized capability. In this study, 2D graphene nanoparticles are dispersed in glass fiber/polymer composites to optimize and enhance the morphological characteristics of the composites, and some appealing functions have been achieved. In particular, with a 1 wt.% graphene-enriched epoxy resin, conductivity of the developed composites is enhanced dramatically, and the elastic modulus and ultimate tensile strength are improved circa 30% and 10%, respectively. Notably, with an optimized nano-structure in the resin, the composites feature a semi-conductive property and manifest piezoresistivity, on which basis a quantum tunneling effect in the 2D graphene-formed conductive network is triggered, when elastic disturbance is applied to the composites. Making use of such a unique trait, the developed composites possess a capability to self-perceive broadband signals from static tension, through low-frequency vibration, to high-frequency ultrasonic waves (up to several hundred kilohertz). The acquired signals are further used for structural health monitoring. Experimental validation has demonstrated that the developed composites have enhanced mechanical-electrical properties, along with an innovative capability of health self-monitoring.

Original languageEnglish
Publication statusPublished - 1 Jan 2018
Event9th European Workshop on Structural Health Monitoring, EWSHM 2018 - Manchester, United Kingdom
Duration: 10 Jul 201813 Jul 2018

Conference

Conference9th European Workshop on Structural Health Monitoring, EWSHM 2018
Country/TerritoryUnited Kingdom
CityManchester
Period10/07/1813/07/18

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture

Cite this