Journal ArticleDOI
Structural health monitoring of smart composite materials by using EFPI and FBG sensors
TLDR
In this paper, the extrinsic Fabry-Perot interferometer (EFPI) and fiber Bragg grating (FBG) sensors are real-time employed to simultaneously monitor the cure process of CFRP composite laminates with and without damage.Abstract:
Structural health monitoring (SHM) including the real-time cure monitoring and non-destructive evaluation (NDE) in-service is very important and definitely demanded for safely working of high performance composite structures in situ. It is very difficult to carry out by using conventional methods. A unique opportunity was provided to real-time monitor the health status of composite structures by using embedded fiber optic sensors (FOSs). In this paper, the extrinsic Fabry–Perot interferometer (EFPI) and fiber Bragg grating (FBG) sensors are real-time employed to simultaneously monitoring the cure process of CFRP composite laminates with and without damage. The results show that both embedded EFPI and FBG sensors could be used to monitor the cure progress of composite materials and detect the occurred damage on-line during the fabrication of composite structures. Furthermore, the NDE of smart composite laminates embedded both EFPI and FBG sensors are performed by using the three-point bending test. The experimental results present that the flexural strain of CFRP composite laminates with damage is more than that of CFRP laminates without damage under same load as we expected. Both EFPI and FBG sensors also show the excellent correlation during the cure monitoring and bending test.read more
Citations
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Journal ArticleDOI
Load and health monitoring in glass fibre reinforced composites with an electrically conductive nanocomposite epoxy matrix
TL;DR: In this paper, an epoxy resin was modified with two different types of carbon nanotubes and with carbon black, in order to achieve an electrical conductivity, which was used for both, damage and load detection of fiber reinforced composites.
Journal ArticleDOI
Overview of Fiber Optic Sensor Technologies for Strain/Temperature Sensing Applications in Composite Materials
TL;DR: An overview of the different types of FOS used for strain/temperature sensing in composite materials and their compatibility with and suitability for embedding inside a composite material is presented.
Journal ArticleDOI
Health monitoring of structural composites with embedded carbon nanotube coated glass fiber sensors
James Sebastian,Norman Schehl,Michael Bouchard,Matthew Boehle,Lingchuan Li,Alexandre Lagounov,Khalid Lafdi +6 more
TL;DR: In this article, a novel, multi-modal, nanomaterial based sensor technology that can provide wide area detection of damage was used for structural health monitoring (SHM), which seeks to provide ongoing monitoring of a structure's integrity.
Journal ArticleDOI
Review and Analysis of Peak Tracking Techniques for Fiber Bragg Grating Sensors.
TL;DR: A simulation based on coupled-mode theory compares the performance of the main peak-tracking methods, in terms of accuracy and signal to noise ratio resilience.
Patent
Coaxial cable bragg grating sensor
TL;DR: In this article, a coaxial cable sensor device with periodic impedance discontinuities along the length of its cable is described, which can be used to measure temperature, pressure, strain, and acoustic waves in building structures.
References
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Journal ArticleDOI
In-fibre Bragg grating sensors
TL;DR: In-fibre Bragg grating (FBG) sensors are one of the most exciting developments in the field of optical fiber sensors in recent years as discussed by the authors, and significant progress has been made in applications to strain and temperature measurements.
Journal ArticleDOI
Review of NDT methods in the assessment of concrete and masonry structures
D. M. McCann,Michael Forde +1 more
TL;DR: In this paper, the state of the art of non-destructive testing (NDT) methods as applied to the civil engineering industry in the Millennium Year, 2000 is reviewed.
Journal ArticleDOI
Cure monitoring of smart composites using Fiber Bragg Grating based embedded sensors
Abstract: A sensor embedded in the composite laminate can act as a temperature transducer during the composite cure mechanism. Once the composite is cured, the same sensor can be used to provide the information about the mechanical changes that influence the performance of the material. Fiber Bragg Grating (FBG) sensor is one such sensor which one can use for the composite cure monitoring. We present here the results obtained with an associated FBG sensor system for the cure monitoring of smart composites. The performance of the embedded FBG sensor smart composite specimens under 3- and 4-point bending conditions are also being investigated. Finally, the performance analysis has been extended to cantilever specimens.
Journal ArticleDOI
Monitoring of fibre reinforced composites with embedded optical fibre Bragg sensors, with application to filament wound pressure vessels
TL;DR: In this article, a Bragg sensor was used for bending tests on bare optical fibres and the results demonstrate the applicability of Bragg sensors for continuous monitoring of composite materials.
Journal ArticleDOI
Strain monitoring in composite-strengthened concrete structures using optical fibre sensors
TL;DR: In this paper, an experimental investigation on the composite-strengthened concrete structures with the embedment of fibre-optic Bragg grating (FBG) sensors is presented.