Modeling and analysis of stretching strain in clamped-clamped beams for energy harvesting

Emad, Ahmed; Mahmoud, M. A.; Ghoneima, Maged; Dessouky, Mohamed

doi:10.1109/mwscas.2016.7870073

Cited by 3 publications

(4 citation statements)

References 12 publications

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“…In the simulation results, the amplitude of output voltage is around 3.67 Volt, and the instantaneous power output is 2.7 μWatt. Figure 3 (a) Experimental setup, in which ○ 1 is the computer,○ 2 is the signal generator, ○ 3 is power amplifier, ○ 4 is vibrating shaker, ○ 5 is the doubly clamped energy harver, ○ 6 is the AC-DC rectifier circuit and ○ 8 is data acquisition card; (b) is the enlarged view of the energy harvesting device.…”

Section: Simulation and Experiments Resultsmentioning

confidence: 99%

“…Kashyap[4] derived an analytical model for the doubly clamped unimorph segmented piezoelectric energy harvester with Euler-Bernoulli beam assumptions. In 2016, Emad [5] utilized the stretch strain of the doubly clamped beam structures to harness the ambient vibration energy, in which the geometry structure only composed of piezoelectric material without the elastic substrate. In their simulation results, it showed highly nonlinear phenomena with an output of 4μW from vibration of 0.5g at 70 Hz.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Flexible Doubly Clamped Beam Energy Harvester with a Standard Rectifier Electric Circuit

Mei

Shi

Chen

et al. 2019

Human Centered Computing

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：While wearable electronics are rapidly developing nowdays, it is greatly limited by the power solutions. Flexible piezoelectric energy harvester presents advantages of high energy density, compact architecture, and easy integration with MEMS, which provides an attractive prospect to power these next generation electronics. Since the flexible devices are usually devised with wavy, island-bridge, and precisely controlled buckling structures, the doubly clamped beam structure for energy harvesting application is analytically studied in this paper. Combine with Euler-Bernoulli beam theory and separation variable method, the analytical expression for output voltage is derived. By conducting the analytical simulation, it is found that the output power is related with the geometry dimensions, external excitation and load resistances. For further validation, experiment is systematically studied. By connecting the standard rectifier electric circuit with the energy harvesting device, it is found that a 0.1uF capacitor can be fully charged in 0.15 s, and the charged output voltage is about 2.5 Volt, which are successfully used for powering LED s.

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Section: Simulation and Experiments Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Flexible Doubly Clamped Beam Energy Harvester with a Standard Rectifier Electric Circuit

Mei

Shi

Chen

et al. 2019

Human Centered Computing

View full text Add to dashboard Cite

show abstract

“…In 2016, Zhou Z [ 15 ] presented a nonlinear flexible bistable energy harvester that can realize snap-through by a clamped-clamped beam structure with a mid-magnet to broaden the frequency bandwidth. Ahmed Emad et al [ 16 ] utilized stretching strain of a Polyvinylidene Fluoride (PVDF) doubly clamped piezoelectric beam structure to harvest energy from vibrations, which exhibits a highly nonlinear frequency response that widens the bandwidth. In their result, the device with a design of a 9.9 mm 3 energy harvester can generate up to 4 μW from vibrations of 0.5 g at 70 Hz.…”

Section: Introductionmentioning

confidence: 99%

Analytical Modeling of a Doubly Clamped Flexible Piezoelectric Energy Harvester with Axial Excitation and Its Experimental Characterization

Mei

Fan

et al. 2021

Sensors

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With the rapid development of wearable electronics, novel power solutions are required to adapt to flexible surfaces for widespread applications, thus flexible energy harvesters have been extensively studied for their flexibility and stretchability. However, poor power output and insufficient sensitivity to environmental changes limit its widespread application in engineering practice. A doubly clamped flexible piezoelectric energy harvester (FPEH) with axial excitation is therefore proposed for higher power output in a low-frequency vibration environment. Combining the Euler–Bernoulli beam theory and the D’Alembert principle, the differential dynamic equation of the doubly clamped energy harvester is derived, in which the excitation mode of axial load with pre-deformation is considered. A numerical solution of voltage amplitude and average power is obtained using the Rayleigh–Ritz method. Output power of 22.5 μW at 27.1 Hz, with the optimal load resistance being 1 MΩ, is determined by the frequency sweeping analysis. In order to power electronic devices, the converted alternating electric energy should be rectified into direct current energy. By connecting to the MDA2500 standard rectified electric bridge, a rectified DC output voltage across the 1 MΩ load resistor is characterized to be 2.39 V. For further validation of the mechanical-electrical dynamical model of the doubly clamped flexible piezoelectric energy harvester, its output performances, including both its frequency response and resistance load matching performances, are experimentally characterized. From the experimental results, the maximum output power is 1.38 μW, with a load resistance of 5.7 MΩ at 27 Hz, and the rectified DC output voltage reaches 1.84 V, which shows coincidence with simulation results and is proved to be sufficient for powering LED electronics.

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“…Despite the diverse design of PVDF based VEHs, most of them are still linear oscillators based on metal substrates [18,19] and suffer from the limited bandwidth around their linear resonances. To broaden the bandwidth of the PVDF based VEHs, Emad et al developed a nonlinear hardening VEH based on clampedclamped PVDF beam [20]. According to their simulation results, the frequency bandwidth broadened from 50 to 70 Hz at an excitation level of 0.5 g. Li et al prototyped a bi-resonant PVDF structure based VEH.…”

Section: Introductionmentioning

confidence: 99%

Soft magneto-sensitive elastomer and polyvinylidene fluoride polymer based nonlinear piezoelectric energy harvesting: design, modelling and experiment

Yang

Xie

Sun

et al. 2018

Smart Mater. Struct.

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In this paper, a broadband vibrational energy harvester (VEH) is developed based on a soft magneto-sensitive elastomer (SMSE). The utilization of SMSE provides the VEH with a strong softening effect when it is subjected to the magnetic field of a permanent magnet. A polyvinylidene fluoride (PVDF) layer is attached to the SMSE to convert vibrational energy into electricity. A magneto-electro-mechanical model based on finite element method is developed and is further reduced using assumed modes. Two prototypes are fabricated with different SMSE thicknesses (3 mm and 5 mm respectively). Frequency sweep experiments are conducted to investigate their broadband behavior. The difference between jumping frequencies are 2.39 and 4.34 Hz at a low acceleration level of 0.3 g. With the broadband characteristics of SMSE, the two prototypes are capable of providing power over a wide frequency range and generating an average power of 0.096 μW and 0.11 μW respectively with a load of 4.7 MΩ.

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Modeling and analysis of stretching strain in clamped-clamped beams for energy harvesting

Cited by 3 publications

References 12 publications

A Flexible Doubly Clamped Beam Energy Harvester with a Standard Rectifier Electric Circuit

A Flexible Doubly Clamped Beam Energy Harvester with a Standard Rectifier Electric Circuit

Analytical Modeling of a Doubly Clamped Flexible Piezoelectric Energy Harvester with Axial Excitation and Its Experimental Characterization

Soft magneto-sensitive elastomer and polyvinylidene fluoride polymer based nonlinear piezoelectric energy harvesting: design, modelling and experiment

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