Dynamic mechanical characterization with respect to temperature, humidity, frequency and strain in mPOFs made of different materials

Leal‐Junior, Arnaldo; Frizera, Anselmo; Fasano, Andrea; Woyessa, Getinet; Bang, Ole; Marques, Carlos

doi:10.1364/ome.8.000804

Cited by 62 publications

(23 citation statements)

References 45 publications

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“…This is in agreement with the very low frequency sensitivity of the elastic modulus, which is on the scale of about 1-2% change per decade change in frequency, observed on un-aligned amorphous polymers [51]. A recent paper reports an increase of the elastic modulus with frequency for dynamic (DMA) [29][30][31] testing of POFs. Most of the samples tested in ref [29] are from the same polymers as the ones used in this work.…”

Section: Effect Of Straining Rate and Annealing On The Elastic Modulussupporting

confidence: 86%

“…A recent paper reports an increase of the elastic modulus with frequency for dynamic (DMA) [29][30][31] testing of POFs. Most of the samples tested in ref [29] are from the same polymers as the ones used in this work. An increase of fibre's elastic modulus on the level of 10% per decade of frequency increase was observed.…”

Section: Effect Of Straining Rate and Annealing On The Elastic Modulusmentioning

confidence: 99%

“…Mechanical characterization of POFs has been done uniquely by extension of the fibres. Classically, as done here, by applying a constant extension rate, though more advanced regimes as dynamic mechanical characterization has been applied recently [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mechanical characterization of drawn Zeonex, Topas, polycarbonate and PMMA microstructured polymer optical fibres

Rasmussen¹,

Fasano²,

Stajanča³

et al. 2018

Opt. Mater. Express

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Section: Effect Of Straining Rate and Annealing On The Elastic Modulussupporting

confidence: 86%

Section: Effect Of Straining Rate and Annealing On The Elastic Modulusmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical characterization of drawn Zeonex, Topas, polycarbonate and PMMA microstructured polymer optical fibres

Rasmussen¹,

Fasano²,

Stajanča³

et al. 2018

Opt. Mater. Express

Self Cite

View full text Add to dashboard Cite

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“…Since the flexible structures and actuators in soft robotics are generally made of polymers, temperature plays an important role in the robot’s operation due to the polymer viscoelastic nature. The polymer viscoelasticity leads to a non-constant response to stress and strain [34], in which the polymer’s Young’s modulus varies due to temperature deviations [35]. For this reason, temperature monitoring can compensate these effects on the actuator structure, which enables an accurate and reliable sensor system.…”

Section: Introductionmentioning

confidence: 99%

Application of Additive Layer Manufacturing Technique on the Development of High Sensitive Fiber Bragg Grating Temperature Sensors

Leal‐Junior

Casas

Marques

et al. 2018

Sensors

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This paper presents the development of temperature sensors based on fiber Bragg gratings (FBGs) embedded in 3D-printed structures made of different materials, namely polylatic acid (PLA) and thermoplastic polyurethane (TPU). A numerical analysis of the material behavior and its interaction with the FBG sensor was performed through the finite element method. A simple, fast and prone to automation process is presented for the FBG embedment in both PLA and TPU structures. The temperature tests were made using both PLA- and TPU-embedded FBGs as well as an unembedded FBG as reference. Results show an outstanding temperature sensitivity of 139 pm/°C for the FBG-embedded PLA structure, which is one of the highest temperature sensitivities reported for FBG-based temperature sensors in silica fibers. The sensor also shows almost negligible hysteresis (highest hysteresis below 0.5%). In addition, both PLA- and TPU-embedded structures present high linearity and response time below 2 s. The results presented in this work not only demonstrate the feasibility of developing fully embedded temperature sensors with high resolution and in compliance with soft robot application requirements, but also show that the FBG embedment in such structures is capable of enhancing the sensor performance.

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“…proposed a polymer optical fiber-based sensor for simultaneous measurement of breath and heartbeat rate under dynamic movements [20][21]. Such as the optical interferometric sensor, the fiber-optic fluorescence sensor, the plastic optical fiber sensor, the optical fiber micro bend sensor, etc.…”

Section: Introductionmentioning

confidence: 99%

Wearable Optical Fiber Sensor Based on a Bend Singlemode-Multimode-Singlemode Fiber Structure for Respiration Monitoring

Pang

Liu

et al. 2021

IEEE Sensors J.

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Respiration rate (RR) is an important information related to human physiological health. A wearable optical fiber sensor for respiration monitoring based on a bend singlemode-multimodesinglemode (SMS) fiber structure, which is highly sensitive to bend, is firstly proposed and experimentally demonstrated. The sensor fastened by an elastic belt on the abdomen of a person will acquire the respiration signal when the person breaths, which will introduce front and back movement of the abdomen, and thus bend of SMS fiber structure. Short-time Fourier transform (STFT) method is employed for signal processing to extract characteristic information of both the time and frequency domain of the measured waveform, which provides accurate RR measurement. Six different SMS fiber sensors have been tested by six individuals and the experimental results demonstrated that the RR signals can be effectively monitored among different individuals, where an average Pearson Correlation Coefficient of 0.88 of the respiration signal has been achieved, which agrees very well with that of commercial belt respiration sensor. The proposed technique can provide a new wearable and portable solution for monitoring of respiratory with advantage of easy fabrication and robust to environment.

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Dynamic mechanical characterization with respect to temperature, humidity, frequency and strain in mPOFs made of different materials

Cited by 62 publications

References 45 publications

Mechanical characterization of drawn Zeonex, Topas, polycarbonate and PMMA microstructured polymer optical fibres

Mechanical characterization of drawn Zeonex, Topas, polycarbonate and PMMA microstructured polymer optical fibres

Application of Additive Layer Manufacturing Technique on the Development of High Sensitive Fiber Bragg Grating Temperature Sensors

Wearable Optical Fiber Sensor Based on a Bend Singlemode-Multimode-Singlemode Fiber Structure for Respiration Monitoring

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