Experimental Control of Curing via Dielectric and Fibre Bragg Grating Sensors for Composite Patch Repairs

2011 ◽  
Vol 9 (4) ◽  
pp. 1265-1272 ◽  
Author(s):  
K. Kalkanis ◽  
G. J. Tsamasphyros ◽  
G. N. Kanderakis ◽  
N. Pantelelis ◽  
M. Tur ◽  
...  
Keyword(s):  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Experimental Control ◽  
Composite Patch ◽  
Patch Repairs

Fiber Bragg grating sensing in smart composite patch repairs for aging aircraft

2005 ◽  
Author(s):  
I. Kressel ◽  
Y. Botsev ◽  
H. Leibovich ◽  
P. Guedj ◽  
U. Ben-Simon ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Smart Composite ◽  
Composite Patch ◽  
Aging Aircraft ◽  
Patch Repairs

Fiber Bragg grating sensing in smart composite patch repairs for aging aircraft

2004 ◽  
Author(s):  
Y. Botsev ◽  
Nahum Gorbatov ◽  
Moshe Tur ◽  
U. Ben-Simon ◽  
I. Kressel ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Smart Composite ◽  
Composite Patch ◽  
Aging Aircraft ◽  
Patch Repairs

scholarly journals Experimental Control of Curing & Structural Health Monitoring for Composite Patch Repairs

2011 ◽  
Vol 4 (1) ◽  
pp. 105-109 ◽  
Author(s):  
K. Kalkanis ◽  
◽  
G. J. Tsamasphyros ◽  
G. N. Kanderakis ◽  
N. Pantelelis ◽  
...  
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Experimental Control ◽  
Structural Health ◽  
Composite Patch ◽  
Patch Repairs

scholarly journals An Experimental and Numerical Study on the Use of Chirped FBG Sensors for Monitoring Fatigue Damage in Hybrid Composite Patch Repairs

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1168
Author(s):  
Rodolfo L. Rito ◽  
Stephen L. Ogin ◽  
Andrew D. Crocombe
Keyword(s):  
Numerical Study ◽  
Fatigue Cracks ◽  
Fatigue Loading ◽  
Bond Line ◽  
Fibre Bragg Grating ◽  
Sensor Location ◽  
Composite Patch ◽  
Film Adhesive ◽  
Patch Repairs ◽  
Tension Loading

In this paper, chirped fibre Bragg grating (CFBG) sensors used to monitor the structural health of a composite patch used to repair an aluminium panel is presented. To introduce damage, a notch was produced at the centre of an aluminium panel. The repair consisted of bonding a pre-cured composite patch to the host panel using an aerospace-grade film adhesive; the sensor was embedded in the bond-line during fabrication of the repair. The repaired panels were subjected to tension-tension loading in fatigue. Cracks initiated and grew from both ends of the notch in the aluminium panels and the fatigue loading was stopped periodically for short periods of time to record the reflected spectra from the sensor. It was found that perturbations in the reflected spectra began to occur when the crack was within about 2 to 3 mm of the sensor location; after the crack passed the sensor location, the perturbations essentially stabilised. Predicted reflected spectra have been found to be in good agreement with the experiment, confirming that CFBG sensors can detect crack growth in patch-repaired panels.

Amplification of fibre Bragg grating reflectivity by post-writing exposure with a 193 nm ArF laser

1994 ◽  
Vol 30 (14) ◽  
pp. 1133-1134 ◽  
Author(s):  
P. E. Dyer ◽  
K. C. Byron ◽  
R. J. Farley ◽  
R. Giedl
Keyword(s):  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Arf Laser ◽  
193 Nm

Microwave phase shifter based on fibre Bragg grating

1998 ◽  
Vol 34 (21) ◽  
pp. 2051 ◽  
Author(s):  
B. Ortega ◽  
J.L. Cruz ◽  
M.V. Andrés ◽  
A. Díez ◽  
D. Pastor ◽  
...  
Keyword(s):  
Phase Shifter ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Microwave Phase Shifter

scholarly journals Photon-magnon response to fluid variability and saturation levels in sandstone reservoirs

2020 ◽  
Vol 17 (6) ◽  
pp. 1065-1074
Author(s):  
Abdullah Musa Ali ◽  
Amir Rostami ◽  
Noorhana Yahya
Keyword(s):  
Oil Recovery ◽  
Relative Permittivity ◽  
Wave Interaction ◽  
Heterogeneous Porous Media ◽  
Injection System ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Core Flooding ◽  
Oil Saturation ◽  
Fluid Saturation

Abstract The need to recover high viscosity heavy oil from the residual phase of reservoirs has raised interest in the use of electromagnetics (EM) for enhanced oil recovery. However, the transformation of EM wave properties must be taken into consideration with respect to the dynamic interaction between fluid and solid phases. Consequently, this study discretises EM wave interaction with heterogeneous porous media (sandstones) under different fluid saturations (oil and water) to aid the monitoring of fluid mobility and activation of magnetic nanofluid in the reservoir. To achieve this aim, this study defined the various EM responses and signatures for brine and oil saturation and fluid saturation levels. A Nanofluid Electromagnetic Injection System (NES) was deployed for a fluid injection/core-flooding experiment. Inductance, resistance and capacitance (LRC) were recorded as the different fluids were injected into a 1.0-m long Berea core, starting from brine imbibition to oil saturation, brine flooding and eventually magnetite nanofluid flooding. The fluid mobility was monitored using a fibre Bragg grating sensor. The experimental measurements of the relative permittivity of the Berea sandstone core (with embedded detectors) saturated with brine, oil and magnetite nanofluid were given in the frequency band of 200 kHz. The behaviour of relative permittivity and attenuation of the EM wave was observed to be convolutedly dependent on the sandstone saturation history. The fibre Bragg Grating (FBG) sensor was able to detect the interaction of the Fe3O4 nanofluid with the magnetic field, which underpins the fluid mobility fundamentals that resulted in an anomalous response.

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