Composite Materials Monitoring by Fiber Optic Sensors

The paper presents methods for testing the composite materials using two types of fiber-optic sensors as well as a method for using radiation of the vertical-cavity emitting laser radiation (VCSEL) for checking the material deformation and its performances. The deformation checking sensor is a fiber Bragg grating (FBG) with a spectrum width of 50 pm, which is interrogated by the VCSEL. A new algorithm for modulating the laser diode current is proposed for the FBG interrogation providing a dynamic range of at least 3 nm. A new interrogation method of impulse Fabry-Perot interferometer was proposed. The interrogation method was applied for a fiber-optic acoustic emission sensor manufacturing. The sensor was experimentally investigated by the impact of a 6 mm diameter steel ball and compared to a reference piezoelectric acoustic emission transducer.

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Measurement of deformation of aircraft structures made of composite materials with fiber-optic sensors

2020 International Conference on Electrotechnical Complexes and Systems (ICOECS) ◽

10.1109/icoecs50468.2020.9278463 ◽

2020 ◽

Author(s):

A.R. Sagadeev ◽

E.V. Vazhdaev ◽

N.A. Avdonina ◽

T.A. Zakurdaeva ◽

T.M. Levina

Keyword(s):

Composite Materials ◽

Fiber Optic ◽

Fiber Optic Sensors ◽

Aircraft Structures

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Fiber-optic acoustic emission sensors with dual Fabry-Perot interferometric cavities

Optics and Precision Engineering ◽

10.3788/ope.20152311.3069 ◽

2015 ◽

Vol 23 (11) ◽

pp. 3069-3076

Author(s):

赵江海 ZHAO Jiang-hai ◽

章小建 ZHANG Xiao-jian

Keyword(s):

Acoustic Emission ◽

Fiber Optic ◽

Fabry Perot ◽

Acoustic Emission Sensors

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Fiber optic microphone with large dynamic range based on bi-fiber Fabry-Perot cavity

AOPC 2017: Fiber Optic Sensing and Optical Communications ◽

10.1117/12.2283009 ◽

2017 ◽

Author(s):

Jin Cheng ◽

Dan-feng Lu ◽

Ran Gao ◽

Zhi-mei Qi

Keyword(s):

Fiber Optic ◽

Dynamic Range ◽

Large Dynamic Range ◽

Fabry Perot

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Application of fiber optic sensors for elevated temperature testing of polymer matrix composite materials

Science and Engineering of Composite Materials ◽

10.1515/secm.2011.014 ◽

2011 ◽

Vol 18 (1-2) ◽

pp. 109-116

Author(s):

John Montesano ◽

Marina Selezneva ◽

Cheung Poon ◽

Zouheir Fawaz ◽

Kamran Behdinan

Keyword(s):

Elevated Temperature ◽

Composite Materials ◽

Matrix Composite ◽

Polymer Matrix ◽

Optical Sensors ◽

Fiber Optic ◽

Fiber Optic Sensors ◽

Polymer Matrix Composite ◽

Test Protocol ◽

Temperature Applications

AbstractAdvanced polymer matrix composite (PMC) materials have been more frequently employed for aerospace applications due to their light weight and high strength. Fiber-reinforced PMC materials are also being considered as potential candidates for elevated temperature applications such as supersonic vehicle airframes and propulsion system components. A new generation of high glass-transition temperature polymers has enabled this development to materialize. Clearly, there is a requirement to better understand the mechanical behaviour of this class of composite materials. In this study, polyimide-coated fiber optic sensors are employed to continuously monitor strain in a woven carbon fiber bismaleimide (BMI) matrix laminate subjected to tensile static and fatigue loading at elevated temperatures. A unique experimental test protocol is utilized to investigate the capability of the optical sensors to monitor strain and track stiffness degradation of the composite material. An advanced interrogation system and an optical spectrum analyzer are utilized to track the variation in the optical fiber wavelength and the wavelength spectrum for correlation with strain gage measurements. Isothermal tensile static and fatigue tests at room temperature, 105°C, 160°C and 205°C suggest that these optical sensors are capable of continuously monitoring strain and tracking the stiffness loss of a highly compliant PMC specimen during cyclic loading. The results illustrate that employing optical sensors for elevated temperature applications has significant advantages when compared to conventional strain gages.

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