On the sensitivity and repeatability of fiber Bragg grating sensors used in strain and material degradation measurement of magnesium alloys under cyclic loads

Marzbanrad, Bahareh; Jahed, Hamid; Toyserkani, Ehsan

doi:10.1007/s00170-016-8485-8

Cited by 9 publications

(9 citation statements)

References 25 publications

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“…In-situ monitoring of mechanical and thermal strain was implemented during the cold spray coating process through embedded FBG sensors in Mg alloy substrates. Response of FBG sensors to axial deformation (extension or contraction of the gratings) due to thermal and/or mechanical stimulus is a linear wavelength change; an increase in grating period due to elongation of the fiber causes a red shift (higher wavelength) of the central wavelength and vice versa [13,14]. Fig 4 shows a set of critical spectrums obtained at different nozzle positions during cold spraying for three different embedded samples.…”

Section: Resultsmentioning

confidence: 99%

Application Of FBG Optical Sensors To In-Situ Monitoring The Thermo-Mechanical Behaviour Of Cold Spray Coated Samples

Marzbanrad¹,

Ahmed²,

Jahed³

et al. 2018

Progress in Canadian Mechanical Engineering

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In this research, a fiber Bragg grating (FBG) sensor is employed for monitoring thermal and mechanical strain induced by severe plastic deformation during high thermal and mechanical strain rate of cold spray technique. The FBG sensors are embedded in magnesium alloy substrates and the strain evolutions of the substrates are recorded during the cold gas spray coating process. In these experiments, the localized transient thermo-mechanical strain induced in the close vicinity of the substrate surface is monitored. Qualitative analysis of the complicated spectra shapes obtained during coating and cooling processes demonstrates the repeatability and sensitivity of the sensors in this condition. In addition, the obtained result from FBG sensors reveals the existence of compressive strain in the substrate near the interface during peening; however, it is released after a few second because of the high impact temperature of cold spray coating.

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Section: Resultsmentioning

confidence: 99%

Application Of FBG Optical Sensors To In-Situ Monitoring The Thermo-Mechanical Behaviour Of Cold Spray Coated Samples

Marzbanrad¹,

Ahmed²,

Jahed³

et al. 2018

Progress in Canadian Mechanical Engineering

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“…Before performing the RBTs, sensor calibration and measurement verifications were performed on a servo‐hydraulic testing machine (Instron 8874) using extensometers (Epsilon Technology Corp). The outcomes were used to calibrate the sensor …”

Section: Materials and Experimentsmentioning

confidence: 99%

“…The outcomes were used to calibrate the sensor. 17 The RBTs were conducted on a standard Instron Moore RBM. Bending moments were applied to specimens by means of hanging weights in a four-point bending configuration.…”

Section: A T E R I a L A N D E X P E R I M E N Tmentioning

confidence: 99%

“…The glue was applied to the grated portion of the fibre using a needle and was cured by ultraviolet light irradiation. The instrumented samples were then used in RBTs at different load amplitudes from 2.5 to 6.5 Nm. Changes in the grating periods because of fibre deformation can shift the wavelength of the reflected light passing through the FBG.…”

Section: Materials and Experimentsmentioning

confidence: 99%

“…Recently, a new generation of strain measurement sensor – Fibre Bragg Grating (FBG) – has been utilized for measuring the strain on AZ31B extrusion magnesium alloy samples during load‐control RBTs. In the current investigation, strain measurements were gathered locally in situ by mounting sensors on the RBT samples' gauge section. The accuracy of the FBG sensor's strain measurements was verified by comparing the results with those obtained by a standard extensometer during uniaxial pull–push tests.…”

Section: Introductionmentioning

confidence: 99%

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Cyclic hysteresis of AZ31B extrusion under load‐control tests using embedded sensor technology

Marzbanrad

Toyserkani

Jahed

2016

Fatigue Fract Eng Mat Struct

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The fatigue behaviour of AZ31B extrusion magnesium alloy under load‐control cyclic test conditions is estimated using a combination of simulation and experimental results. The strain measurement of this asymmetric material is found experimentally using a Fibre Bragg Grating (FBG) sensor during rotating bending tests. Then, to analyse applied stresses in the sample – particularly in the plastic deformation range – the Variable Material Property (VMP) method is employed. Using this simulation method, the hysteresis loops of two critical top and bottom elements of the sample's cross section under different bending moments are obtained. Finally, the strain of the sample during rotating bending, as measured by the embedded FBG sensor, is related to the stresses obtained from the modeling using a mapping function. The hystereses obtained from this combination of the modeling and experimental results are compared with the results of a companion strain‐control pull–push test in which the input strain history was that of measured by the FBG sensor. Observations verify that the stresses of the combined VMP‐FBG hysteresis loops have good compatibility with the stress responses obtained through the experiment. The hybrid model introduced in this work can be employed to capture cyclic hysteresis, and hence estimate the fatigue life, under load‐controlled rotating bending tests.

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Experimental study on cross-sensitivity of temperature and vibration of embedded fiber Bragg grating sensors

Chen

Liu

et al. 2018

Optoelectron. Lett.

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On the sensitivity and repeatability of fiber Bragg grating sensors used in strain and material degradation measurement of magnesium alloys under cyclic loads

Cited by 9 publications

References 25 publications

Application Of FBG Optical Sensors To In-Situ Monitoring The Thermo-Mechanical Behaviour Of Cold Spray Coated Samples

Application Of FBG Optical Sensors To In-Situ Monitoring The Thermo-Mechanical Behaviour Of Cold Spray Coated Samples

Cyclic hysteresis of AZ31B extrusion under load‐control tests using embedded sensor technology

Experimental study on cross-sensitivity of temperature and vibration of embedded fiber Bragg grating sensors

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