scholarly journals Investigation of embedded near infrared fibre Bragg grating (FBG) sensors (830 nm) in structural health monitoring of glass fibre composite structures

2008 ◽  
Author(s):  
Jayantha A. Epaarachchi ◽  
John Canning ◽  
Michael Stevenson
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Glass Fibre ◽  
Composite Structures ◽  
Near Infrared ◽  
Fibre Composite ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Fbg Sensors ◽  
Glass Fibre Composite

Fibre Bragg grating sensor applications for structural health monitoring

2018 ◽  
Vol 92 (3) ◽  
pp. 355-367
Author(s):  
Cansu Karatas ◽  
Boray Degerliyurt ◽  
Yavuz Yaman ◽  
Melin Sahin
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Composite Structures ◽  
Composite Beams ◽  
Strain Gauges ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Content Type ◽  
Structural Health ◽  
Fbg Sensors

Purpose Structural health monitoring (SHM) has become an attractive subject in aerospace engineering field considering the opportunity to avoid catastrophic failures by detecting damage in advance and to reduce maintenance costs. Fibre Bragg Grating (FBG) sensors are denoted as one of the most promising sensors for SHM applications as they are lightweight, immune to electromagnetic effects and able to be embedded between the layers of composite structures. The purpose of this paper is to research on and demonstrate the feasibility of FBG sensors for SHM of composite structures. Design/methodology/approach Applications on thin composite beams intended for SHM studies are presented. The sensor system, which includes FBG sensors and related interrogator system, and manufacturing of the beams with embedded sensors, are detailed. Static tension and torsion tests are conducted to verify the effectiveness of the system. Strain analysis results obtained from the tests are compared with the ones obtained from the finite element analyses conducted using ABAQUS® software. In addition, the comparison between the data obtained from the FBG sensors and from the strain gauges is made by also considering the noise content. Finally, fatigue test under torsion load is conducted to observe the durability of FBG sensors. Findings The results demonstrated that FBG sensors are feasible for SHM of composite structures as the strain data are accurate and less noisy compared to that obtained from the strain gauges. Furthermore, the convenience of obtaining reliable data between the layers of a composite structure using embedded FBG sensors is observed. Practical implications Observing the advantages of the FBG sensors for strain measurement will promote using FBG sensors for damage detection related to the SHM applications. Originality/value This paper presents applications of FBG sensors on thin composite beams, which reveal the suitability of FBG sensors for SHM of lightweight composite structures.

Structural Health Monitoring System of Composite Beams with Surface Bonded and Embedded Fibre Bragg Grating Sensors

2017 ◽  
Vol 744 ◽  
pp. 332-336 ◽  
Author(s):  
Boray Değerliyurt ◽  
Cansu Karataş ◽  
Melin Şahin ◽  
Yavuz Yaman
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Stress Concentrations ◽  
Bending Tests ◽  
Health Monitoring System ◽  
Structural Health ◽  
Paper Manufacturing ◽  
Fbg Sensors

Fibre Bragg Grating (FBG) sensors are frequently being used for Structural Health Monitoring (SHM) of aerospace structures. One of the most important advantages of using FBG sensors is that it is possible to embed them into composites. In this paper, manufacturing methods of composite specimens with embedded FBG sensors are given. To avoid stress concentrations at ingress/egress regions of fibre optic wires, PTFE (Teflon) tubes were used during manufacturing. Moreover, FBG connectors melt at high curing temperatures. Therefore, those connectors were cut and after manufacturing, these connectors were spliced back to the FBG sensors. Embedded FBG’s were then checked and the correct wavelength data were taken. All the sensors were observed as intact and ready for bending tests. Procedure for bending tests is also explained including applied loads, boundary conditions, test setup and the peripheral equipment. Results of bending tests show that the system is an appropriate one for SHM purposes.

scholarly journals Structural Health Monitoring of Gantry Girder using Fibre Bragg Grating Sensors

2019 ◽  
Vol 9 (1) ◽  
pp. 2956-2958
Keyword(s):  
Structural Health Monitoring ◽  
Fiber Bragg Grating ◽  
Health Monitoring ◽  
Strain Sensors ◽  
Work Place ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Structural Health ◽  
Fbg Sensors ◽  
Heavy Loads

Most of the industries have an in-build overhead crane that helps in lifting and transportation of heavy loads from one location of work place to another. Gantry girders are provided to support the loads transmitted through the moving wheels of the overhead cranes. The paper presents the structural health monitoring (SHM) practices that can be implemented for damage detection of gantry girder using Fiber Bragg Grating (FBG) sensors that are positioned on the key parts of the crane. The sensor is designed for monitoring the stress and strain of the girder. The alternating stress was determined based on distributed fiber bragg grating strain sensors. The analysis of the signals based on finite element (FE) models helps to determine the safety condition of the crane.

scholarly journals Fibre Bragg Grating Based Acoustic Emission Measurement System for Structural Health Monitoring Applications

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 897
Author(s):  
Sagar Jinachandran ◽  
Ginu Rajan
Keyword(s):  
Acoustic Emission ◽  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Market Potential ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Emission Measurement ◽  
Structural Health ◽  
Sensing Systems ◽  
Recent Trends

Fiber Bragg grating (FBG)-based acoustic emission (AE) detection and monitoring is considered as a potential and emerging technology for structural health monitoring (SHM) applications. In this paper, an overview of the FBG-based AE monitoring system is presented, and various technologies and methods used for FBG AE interrogation systems are reviewed and discussed. Various commercial FBG AE sensing systems, SHM applications of FBG AE monitoring, and market potential and recent trends are also discussed.

scholarly journals Model of the Temperature Influence on Additively Manufactured Carbon Fibre Reinforced Polymer Samples with Embedded Fibre Bragg Grating Sensors

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 222
Author(s):  
Torkan Shafighfard ◽  
Magdalena Mieloszyk
Keyword(s):  
Numerical Simulation ◽  
Composite Structures ◽  
Thermal Loading ◽  
Elevated Temperatures ◽  
Mechanical Strain ◽  
Experimental Investigations ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Reinforced Polymer ◽  
Fbg Sensors

This study investigates the thermo-mechanical behaviour of additively manufactured Carbon Fiber Reinforced Polymer (CFRP) with embedded Fibre Bragg Grating (FBG) sensors with respect to their feasibility for utilising them under thermal loading. This was conducted through the Finite Element Method (FEM) inside an ABAQUS environment. Numerical simulation was complemented by several experimental investigations in order to verify the computational results achieved for the specimens exposed to thermal loading. FBG sensors, incorporated into the material by embedding technique, were employed to measure the strains of the samples subjected to elevated temperatures. It was shown that the strains given by numerical simulation were in good agreement with the experimental investigation except for a few errors due to the defects created within the layers during Additive Manufacturing (AM) process. It was concluded that the embedding FBG sensors were capable of identifying thermo-mechanical strain accurately for 3D-printed composite structures. Therefore, the findings of this article could be further developed for other types of material and loading conditions.

Fibre Bragg Grating sensor grids for Structural Health Monitoring of the foremast of STS Dar Mlodziezy

2012 ◽  
Vol 227 (8) ◽  
pp. 1665-1680
Author(s):  
A Król ◽  
K Majewska ◽  
M Mieloszyk ◽  
L Murawski ◽  
W Ostachowicz ◽  
...  
Keyword(s):  
Structural Health Monitoring ◽  
Stress Level ◽  
Health Monitoring ◽  
Normal Operation ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Structural Health ◽  
Fibre Bragg Grating Sensor ◽  
Strain Stress ◽  
Bragg Grating Sensor

In this article, a concept of an application for a Fibre Bragg Grating sensor grid for Structural Health Monitoring the foremast of STS Dar Mlodziezy is presented and discussed. Research presented in this article are related to characteristics of the foremast of STS Dar Mlodziezy during her normal operation. The main goal of the research was to determine the strain/stress level of the foremast above the topmast crosstrees where three steel jib stays are mounted. To achieved this goal during the research special attention was paid to setting the sails and to taking in the sails.

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