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High performance piezo electric nanocomposite sensor nodes for structural health monitoring: 21st International Conference on Composite Materials, ICCM 2017

High performance piezo electric nanocomposite sensor nodes for structural health monitoring: 21st International Conference on Composite Materials, ICCM 2017
High performance piezo electric nanocomposite sensor nodes for structural health monitoring: 21st International Conference on Composite Materials, ICCM 2017
The increased usage of composite materials has raised the need for a more reliable damage detection strategy for structural health monitoring (SHM) systems. An important, and as yet unsolved, limitation of existing composite laminates is their susceptibility to impact damage. Low-velocity impact-induced damage is often hard to spot from the impacted side in a routine visual inspection, but it has a significant effect on the mechanical performance of laminates. This work investigates the possibility of embedding poly (vinylidene fluoride) (PVDF) as a sensor node for a passive SHM system in SE70 glass/epoxy laminates to monitor the damage while being subjected to an indentation test. The mechanical test results for the laminates both with and without embedded sensors indicate that the embedment of the PVDF sensors does not change the measured mechanical properties of the laminates. Acoustic emission (AE) signals obtained using the embedded PVDF sensor were compared with an identical PVDF sensor attached on the laminate’s surface. The results showed the possibility of successfully embedding PVDF sensors in composite laminates and the functionality of the PVDF sensors after the embedding procedure, i.e. their ability to withstand the composite curing temperature without experiencing degradation. However, the amplitude level of the AE signals obtained with the PVDF is lower than that of the commercial sensor, which is due to the low coupling factor and dielectric constant of the PVDF. Therefore, the development of two- and three-phase AE sensors (lead zirconate titanate (PZT)/epoxy and graphene nanoplatelets (GnPs)) were also explored to improve the sensitivity of the embedded sensor. The fabrication methods have been developed and the fabricated sensors showed better performance than PVDF sensors during the Hsu-Nielsen Source test. This is a continuing project, therefore further research will be conducted to implant the PZT nanocomposite sensors into composite laminate plates to examine the applicability of these novel sensors as flexible and light weight embedded sensor nodes for structural health monitoring systems.
acoustic emission, composite laminates, graphene platelets, nanocomposite sensors, PVDF, emission signals, acoustic emission testing, tructural health monitoring (SHM) systems
Fotouhi, Mohamad
71cada36-1cae-451d-8e3a-ab040cc7551a
Xiao, Bill
2f4b1a30-73cf-4c89-b5e9-e2bfc34eba6e
Pozegic, Thomas
e20daee5-c559-4605-a04b-b6bf628cd6a6
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Hamerton, Ian
356fb6af-3661-493e-af0e-198da5a3b7ff
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a
Fotouhi, Mohamad
71cada36-1cae-451d-8e3a-ab040cc7551a
Xiao, Bill
2f4b1a30-73cf-4c89-b5e9-e2bfc34eba6e
Pozegic, Thomas
e20daee5-c559-4605-a04b-b6bf628cd6a6
Jalalvand, Meisam
21ef0df8-fc7c-4466-a2fc-ee98ed3408a2
Hamerton, Ian
356fb6af-3661-493e-af0e-198da5a3b7ff
Wisnom, Michael R.
93bec88e-5256-49f2-9869-5ac551e18d7a

Fotouhi, Mohamad, Xiao, Bill, Pozegic, Thomas, Jalalvand, Meisam, Hamerton, Ian and Wisnom, Michael R. (2017) High performance piezo electric nanocomposite sensor nodes for structural health monitoring: 21st International Conference on Composite Materials, ICCM 2017. 21st International Conference on Composite Materials, ICCM 2017, , Xi'an, China. 20 - 25 Aug 2017.

Record type: Conference or Workshop Item (Paper)

Abstract

The increased usage of composite materials has raised the need for a more reliable damage detection strategy for structural health monitoring (SHM) systems. An important, and as yet unsolved, limitation of existing composite laminates is their susceptibility to impact damage. Low-velocity impact-induced damage is often hard to spot from the impacted side in a routine visual inspection, but it has a significant effect on the mechanical performance of laminates. This work investigates the possibility of embedding poly (vinylidene fluoride) (PVDF) as a sensor node for a passive SHM system in SE70 glass/epoxy laminates to monitor the damage while being subjected to an indentation test. The mechanical test results for the laminates both with and without embedded sensors indicate that the embedment of the PVDF sensors does not change the measured mechanical properties of the laminates. Acoustic emission (AE) signals obtained using the embedded PVDF sensor were compared with an identical PVDF sensor attached on the laminate’s surface. The results showed the possibility of successfully embedding PVDF sensors in composite laminates and the functionality of the PVDF sensors after the embedding procedure, i.e. their ability to withstand the composite curing temperature without experiencing degradation. However, the amplitude level of the AE signals obtained with the PVDF is lower than that of the commercial sensor, which is due to the low coupling factor and dielectric constant of the PVDF. Therefore, the development of two- and three-phase AE sensors (lead zirconate titanate (PZT)/epoxy and graphene nanoplatelets (GnPs)) were also explored to improve the sensitivity of the embedded sensor. The fabrication methods have been developed and the fabricated sensors showed better performance than PVDF sensors during the Hsu-Nielsen Source test. This is a continuing project, therefore further research will be conducted to implant the PZT nanocomposite sensors into composite laminate plates to examine the applicability of these novel sensors as flexible and light weight embedded sensor nodes for structural health monitoring systems.

Full text not available from this repository.

More information

Published date: 20 August 2017
Venue - Dates: 21st International Conference on Composite Materials, ICCM 2017, , Xi'an, China, 2017-08-20 - 2017-08-25
Keywords: acoustic emission, composite laminates, graphene platelets, nanocomposite sensors, PVDF, emission signals, acoustic emission testing, tructural health monitoring (SHM) systems

Identifiers

Local EPrints ID: 446510
URI: http://eprints.soton.ac.uk/id/eprint/446510
PURE UUID: 2b4f8e7c-b5a1-423d-bfcd-37cb49bd17d4
ORCID for Meisam Jalalvand: ORCID iD orcid.org/0000-0003-4691-6252

Catalogue record

Date deposited: 12 Feb 2021 17:30
Last modified: 18 Feb 2021 17:42

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Contributors

Author: Mohamad Fotouhi
Author: Bill Xiao
Author: Thomas Pozegic
Author: Ian Hamerton
Author: Michael R. Wisnom

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