Stress-Rate Dependent Output Voltage for Fe&lt;sub&gt;29&lt;/sub&gt;Co&lt;sub&gt;71&lt;/sub&gt; Magnetostrictive Fiber/Polymer Composites: Fabrication, Experimental Observation and Theoretical Prediction

Narita, Fumio; Katabira, Kenichi

doi:10.2320/matertrans.m2016410

Cited by 37 publications

(33 citation statements)

References 11 publications

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“…Here, for a magnetostrictive material that has been magnetized, applied stress is easily able to change the direction of magnetic field as a result of the rotation of domain and/or the movement of domain wall, and furthermore, it then leads to a variation for magnetic induced flux. Additionally, a further experiment showed the correlation between the diameter and stress‐induced output voltage by altering the diameter of the fiber from 1 to 0.2 mm. More recently, we have fabricated magnetostrictive polymer composites, in which FeCo fibers were woven into polyester fabric, and discussed their sensor performance .…”

Section: Introductionmentioning

confidence: 98%

Enhancement of Inverse Magnetostrictive Effect through Stress Concentration for a Notch‐Introduced FeCo Alloy

et al. 2018

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The authors investigate the magnetic flux leakage for a class of magnetostrictive FeCo alloys with a notch undergoing compression and impact with respect to energy harvesting. The magnetic flux leakage plays a crucial role in the practical energy transition in terms of the features for energy harvesting. Therefore, the corresponding situations are systematically studied by combining finite element analysis (FEA) with practical experiments. The FeCo alloys are categorized into three groups with different three-dimensional notch shapes, and the depths of the notches are 0, 0.5, and 1 mm, respectively. The parameters in both the simulations and practical tests are completely consistent. The results of compression test carried out with a stepwiseincreasing stress from 0 to 100 MPa reveal that the variations of magnetic induced flux increase with the increasing depth of the notches. The following FEA herein provides a feasible interpretation that the stress concentration around the notch is largely responsible for the notch-induced enhancement. The findings of the impacting experiments simultaneously exhibit an analogous tendency that the output power is proportional to the depth of notch. Furthermore, the stress rate has no obvious effect on the output electricity. The maximum magnitude of the improvement for the output power increases by almost 400% comparing the specimens with notches of 0 and 1 mm. This study indicates a promising feasibility to achieve vibrationenergy harvesting from various irregular components.

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Section: Introductionmentioning

confidence: 98%

Enhancement of Inverse Magnetostrictive Effect through Stress Concentration for a Notch‐Introduced FeCo Alloy

et al. 2018

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“…To begin addressing the magnetostrictive effect of the Fe-Co fiber, Narita [12] successfully developed magnetostrictive fiber/polymer composites by embedding Fe-Co fibers, with a diameter of 1 mm in an epoxy matrix and investigated the effect of residual stress on the stress-rate dependent output voltage of the composites due to cyclic compressive loads. Narita and Katabira [13] then discussed, theoretically and experimentally, the output voltage characteristics of the magnetostrictive composites by embedding Fe-Co fibers with a diameter of 0.2 mm in the epoxy matrix. In order to develop Fe-Co-fiber-reinforced polymer composites, the fabric was made by weaving with the warp of polyester fibers and the weft of Fe-Co and polyester fibers and two types of samples were fabricated [14].…”

Section: Introductionmentioning

confidence: 99%

Fabrication, Modeling and Characterization of Magnetostrictive Short Fiber Composites

et al. 2020

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Magnetostrictive materials have a wide variety of applications due to their great capability as sensors and energy-harvesting devices. However, their brittleness inhibits their applications as magnetostrictive devices. Recently, we developed a continuous magnetostrictive Fe-Co-fiber-embedded epoxy matrix composite to increase the flexibility of the material. In this study, we fabricated random magnetostrictive Fe-Co short fiber/epoxy composite sheets. It was found that the discontinuous Fe-Co fiber composite sheet has the magnetostrictive properties along the orientation parallel to the length of the sheet. Finite element computations were also carried out using a coupled magneto-mechanical model, for the representative volume element (RVE) of unidirectional aligned magnetostrictive short fiber composites. A simple model of two-dimensional, randomly oriented, magnetostrictive short fiber composites was then proposed and the effective piezomagnetic coefficient was determined. It was shown that the present model is very accurate yet relatively simple to predict the piezomagnetic coefficient of magnetostrictive short fiber composites. This magnetostrictive composite sheet is expected to be used as a flexible smart material.

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“…The output voltage of the Fe-Co wire/ polymer composite under compression increased with the stress rate and reached a maximum at a residual tensile stress of 2.8 MPa (Figure 20a). Narita and Katabira [122] also fabricated magnetostrictive fiber/polymer composites by embedding strong textured Fe-Co fibers with a diameter of 0.2 mm in an Figure 19. Note that the output voltage density of the Fe-Co wire/polymer composite is approximately twice that of Galfenol ( Figure 20b).…”

Section: Polymer With Magnetostrictive Fillersmentioning

confidence: 99%

“…As shown in Figure 21, seven LEDs are lit up by the prototype. Narita and Katabira [122] also fabricated magnetostrictive fiber/polymer composites by embedding strong textured Fe-Co fibers with a diameter of 0.2 mm in an Figure 19. Schematic diagram of Fe-Co wire/polymer composite preparation.…”

Section: Polymer With Magnetostrictive Fillersmentioning

confidence: 99%

A Review on Piezoelectric, Magnetostrictive, and Magnetoelectric Materials and Device Technologies for Energy Harvesting Applications

2017

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In the coming era of the internet of things (IoT), wireless sensor networks that monitor, detect, and gather data will play a crucial role in advancements in public safety, human healthcare, industrial automation, and energy management. Batteries are currently the power source of choice for operating wireless network devices due to their ease of installation; however, they require periodic replacement due to capacity limitations. Within the scope of the IoT, battery maintenance of the trillion sensor nodes that may be implemented will be practically infeasible from environmental, resource, and labor cost perspectives. In considering individual self-powered sensor nodes, the idea of harvesting energy from ambient vibrations, heat, and electromagnetic waves has recently triggered noticeable research interest in the academic community. This paper gives an overview of energy harvesting materials and systems. Three main categories are presented: piezoelectric ceramics/polymers, magnetostrictive alloys, and magnetoelectric (ME) multiferroic composites. State-of-the-art harvesting materials and structures are presented with a focus on characterization, fabrication, modeling and simulation, and durability and reliability. Some perspectives and challenges for the future development of energy harvesting materials are also highlighted.

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Stress-Rate Dependent Output Voltage for Fe<sub>29</sub>Co<sub>71</sub> Magnetostrictive Fiber/Polymer Composites: Fabrication, Experimental Observation and Theoretical Prediction

Cited by 37 publications

References 11 publications

Enhancement of Inverse Magnetostrictive Effect through Stress Concentration for a Notch‐Introduced FeCo Alloy

Enhancement of Inverse Magnetostrictive Effect through Stress Concentration for a Notch‐Introduced FeCo Alloy

Fabrication, Modeling and Characterization of Magnetostrictive Short Fiber Composites

A Review on Piezoelectric, Magnetostrictive, and Magnetoelectric Materials and Device Technologies for Energy Harvesting Applications

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