Strain Monitoring of Pressurized Pipes Using Optical Fiber Bragg Gratings = رصد انفعال الأنابيب المضغوطة باستخدام محززات براغ في الألياف الضوئية

2018 ◽  
Vol 3 (1) ◽  
pp. 34-43
Author(s):  
Ahmed Hisham Morshed ◽  
Raghied Atta
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Strain Monitoring

scholarly journals Monitoring of Torque Induced Strain in Composite Shafts with Embedded and Surface-Mounted Optical Fiber Bragg Gratings

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2403
Author(s):  
Maria Konstantaki ◽  
Georgios Violakis ◽  
Georgios A. Pappas ◽  
Thomas Geernaert ◽  
Nikos Korakas ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Filament Winding ◽  
Strain Monitoring ◽  
Reinforced Polymer ◽  
Applied Torque ◽  
Reinforcing Fibers ◽  
Load Monitoring

In this study, silica glass, optical fiber Bragg gratings (FBGs) are used for torque-induced strain monitoring in carbon fiber reinforced polymer (CFRP) hollow shafts toward the development of a methodology for structural load monitoring. Optical fibers with gratings are embedded during shaft manufacturing, by an industrial filament winding process, along different orientations with respect to its central axis and surface mounted after production. Experimental results are supported by numerical modeling of the shaft with appropriate boundary conditions and homogenized material properties. For an applied torque up to 800 Nm, the strain sensitivity of an embedded grating positioned along the reinforcing fibers’ direction winded under 55° is in the order of 3.6 pm/Nm, while this value is more than 4× times higher than the other examined orientations. The study also shows that surface-mounted optical fiber Bragg gratings along the reinforcing carbon fibers’ direction perform equally well in monitoring strains in composite shafts under torque.

Optical fiber Bragg gratings Part II Modeling of finite-length gratings and grating arrays

2002 ◽  
Vol 19 (9) ◽  
pp. 1855 ◽  
Author(s):  
Vittorio M. N. Passaro ◽  
Roberto Diana ◽  
Mario N. Armenise
Keyword(s):  
Optical Fiber ◽  
Finite Length ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings

Characterization of Optical Fiber Bragg Gratings as Strain Sensors Considering Load Direction

2008 ◽  
Author(s):  
Michael C. Emmons ◽  
Sunny Karnani ◽  
K. P. Mohanchandra ◽  
Gregory P. Carman ◽  
Stefano Trono ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Strain Sensors ◽  
Great Promise ◽  
Fiber Direction ◽  
Load Direction ◽  
Isotropic Composite ◽  
Loading Direction

This study investigates the influence of lay-up and load direction on embedded optical fiber Bragg gratings (FBGs) used as strain sensors. FBGs have shown great promise for application to structural health monitoring with advantages of small size and cylindrical geometry readily allowing for embedment within fiber reinforced composites. Characterization of the embedded FBGs is necessary to develop a rugged and reliable strain sensor. This paper specifically explores the effects of loading direction on the FBG strain outputs. A well behaved baseline case is established with results for gratings loaded parallel to the optical fiber direction while embedded parallel to the adjacent structural fibers in a quasi-isotropic composite. Results and analysis are also presented for a case involving a composite fabricated with the optical and structural fibers parallel to each other but perpendicular to the loading direction. Extremely good results are obtained relating FBG strain measurements with that of surface mounted resistance strain gauges.

scholarly journals Multimode optical fiber Bragg gratings: modeling, simulation, and experiments

2004 ◽  
Author(s):  
Jinsong Zhang ◽  
Honggang Yu ◽  
Chang-Qing Xu ◽  
Wei-Ping Huang
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Multimode Optical Fiber ◽  
Modeling Simulation
Sign in / Sign up

Export Citation Format

Share Document