Note: Strain sensitivity comparison between fiber Bragg gratings inscribed on 125 and 80 micron cladding diameter fibers, case study on the solidification monitoring of a photo-curable resin

2015 ◽  
Vol 86 (2) ◽  
pp. 026106 ◽  
Author(s):  
E. Maccioni ◽  
M. Morganti ◽  
F. Brandi
Keyword(s):  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Strain Sensitivity

Differential strain sensitivity of higher order cladding modes in weakly tilted fiber Bragg gratings

2006 ◽  
Author(s):  
Chengkun Chen ◽  
Lingyun Xiong ◽  
Christophe Caucheteur ◽  
Patrice Mégret ◽  
Jacques Albert
Keyword(s):  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Higher Order ◽  
Strain Sensitivity

Study of the Second Order Sensitivity of the Fiber Bragg Gratings

2011 ◽  
Vol 63-64 ◽  
pp. 732-735
Author(s):  
Gui Hua Zhang
Keyword(s):  
Temperature Change ◽  
Temperature Sensitivity ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Second Order ◽  
Strain Sensitivity ◽  
Mathematical Formulas

According to the Bragging equation, the general mathematical formulas of the temperature change error and the strain error are got under the consideration of the second-order temperature sensitivity and the second-order strain sensitivity. The two error curves are given in the conditions of T = 20°C and e = 1000me.

scholarly journals Strain Measurement on Cracks Using Fiber Bragg Gratings for Use in Aircraft Composite Skin Repairs

Aerospace ◽  
2020 ◽  
Vol 7 (9) ◽  
pp. 138
Author(s):  
Aris A. Ikiades
Keyword(s):  
Spectral Characteristics ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Stress Fields ◽  
Composite Repair ◽  
Local Stresses ◽  
Fbg Sensors ◽  
Critical Components ◽  
Co Doped

Fiber Bragg grating (FBG) sensors have been widely used for measurements of strain and temperature in a host of different applications, including aerospace in composite wings, fuselage structures, and other critical components. Here, we report on a method to measure highly localized intense stress fields, generated at the initialization point of a crack, or crack-tip, using Fiber Bragg Gratings (FBG) inscribed in highly photosensitive hydrogenated germanium and boron co-doped fiber. From the spectral characteristics of short and long FBGs, bonded on a test aluminum coupon with a crack, which simulated damaged skins of an aircraft, the local stresses near the cracks were measured and assessed. As a case study, bespoke composite repair patches were designed and bonded on a coupon, incorporating a number of gratings to monitor the stress distribution with applied force in the composite patch, near the crack.

Case Study for Monitoring the Rhythmic Masticatory Muscle Activity During Sleep Bruxism Episodes by Using Fiber Bragg Gratings

2019 ◽  
Vol 37 (18) ◽  
pp. 4823-4829
Author(s):  
Rodrigo Fiorin ◽  
Ana Paula G. O. Franco ◽  
Mauren Abreu de Souza ◽  
Danielle M. Fontenele ◽  
Ismael Luviseti G. Jones ◽  
...  
Keyword(s):  
Muscle Activity ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Sleep Bruxism ◽  
Masticatory Muscle ◽  
Rhythmic Masticatory Muscle Activity ◽  
Masticatory Muscle Activity

Comparison of strain sensitivity of bare and structure-integrated fiber Bragg gratings

2003 ◽  
Author(s):  
Solomija Y. Lebid ◽  
Detlef Hofmann ◽  
Frank Basedau ◽  
Werner Daum
Keyword(s):  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Strain Sensitivity
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