Glass-fibre-reinforced polymer matrix composites are widely used in various industries because of their unique high strength to weight ratio. Unlike metals, strain-induced and damage states of composites are complicated to predict under real-time loading due to their anisotropic nature. With that focus, a piezoresistive nanomaterial-based structural health monitoring system for laminated polymer composites is proposed to measure the strain induced in the composite under real-time loading. Nanometallic nickel-coated glass fibres are embedded into the polymer composites to monitor the strain and damage induced in them. The nanometallic nickel is coated over the glass fibre by a dip coating technique using epoxy as the binding agent. A microcontroller-based electrical resistance measurement system is used to measure the piezoresistive variation in the coated glass fibre under real-time loading. Using the piezoresistance variation of the embedded nanometallic nickel-coated glass fibre, the real-time strain and damage induced in the composite can be correlated. The piezoresistive response of the coated glass fibre is descibed in two phases, the deformation phase and the failure phase, which clearly show the various states of strain and damage induced in the composites. © 2017 IOP Publishing Ltd.

Sasikumar M

Mechanical

School of Mechanical Engineering

Chennai Campus

Balaji R

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Smart Materials and Structures

The polymer composites are extensively used as advanced materials for various engineering applications such as aviation, marine, automobile and civil structures because of its unique superior properties. The anisotropic nature of the composite makes it as a complicated material to predict strain and damage induced in it under the real-time loading. In order to improve safety and reliability of these composite materials, the real-time strain induced in the composite needs to monitor continuously. With that focus, nanoparticles such as reduced graphene oxide and nano-nickel-coated glass fibre are fabricated and characterised for damage sensing application for the polymer composites reported in this work. The concept of embedding nanoparticles-coated glass fibres in an array of rows and columns as damage sensor is demonstrated by studying its real-time piezoresistive response under medium-velocity impact. When embedded composites are subjected to impact, the corresponding row and column sensor show variation in the piezoresistance. Thus, by monitoring the piezoresistance of the coated glass fibre, the damage and its location can be predicted. Thus, localisation and degree of damage induced in the polymer composites can be predicted by monitoring the piezoresistance of the embedded glass fibre under impact loading. © The Author(s) 2018.

Structural Health Monitoring

Nanoparticles-coated glass fibre–based damage localisation and monitoring system for polymer composites

Small

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A nanometallic nickel-coated, glass-fibre-based structural health monitoring system for polymer composites

Journal	Data powered by TypesetSmart Materials and Structures
Publisher	Data powered by TypesetIOP Publishing
ISSN	0964-1726
Open Access	No