Abstract
The inverse magnetostrictive effect is an effective property for energy harvesting; the material needs to have large magnetostriction and ease of mass production. Fe–Co alloys being magnetostrictive materials have favorable characteristics which are high strength, ductility, and excellent workability, allowing easy fabrication of Fe–Co alloy fibers. In this study, we fabricated magnetostrictive polymer composites, in which Fe–Co fibers were woven into polyester fabric, and discussed their sensor performance. Compression and bending tests were carried out to measure the magnetic flux density change, and the effects of magnetization, bias magnetic field, and the location of the fibers on the performance were discussed. It was shown that magnetic flux density change due to compression and bending is related to the magnetization of the Fe–Co fiber and the bias magnetic field. The magnetic flux density change of Fe–Co fiber reinforced plastics was larger than that of the plastics with Terfenol-D particles.
Highlights
The Internet of Things (IoT) is expected to reform our lifestyles, because it has the ability to improve sensing, actuation, communications, and control, and to create knowledge from big data [1]
The inverse magnetostrictive effect is an effective property for energy harvesting; the materials need to have large magnetostriction and ease of mass production [4]
Terfenol-D has received much attention because of its advantages as an energy harvesting material, its brittleness and eddy currents have prevented it from being adopted over piezoelectric materials
Summary
The Internet of Things (IoT) is expected to reform our lifestyles, because it has the ability to improve sensing, actuation, communications, and control, and to create knowledge from big data [1]. It is desirable for IoT systems to have renewable energy sources, with a self-sustaining and maintenance-free energy harvesting ability [2]. Piezoelectric ceramics/polymers, magnetostrictive alloys, and magnetoelectric composite materials have attracted attention as favorable materials for energy harvesting devices [3]. The inverse magnetostrictive effect is an effective property for energy harvesting; the materials need to have large magnetostriction and ease of mass production [4]. Mori et al [7] numerically and experimentally revealed the energy harvesting properties and behavior of Terfenol-D cantilevers with resonant tuning during dynamic bending. Terfenol-D has received much attention because of its advantages as an energy harvesting material, its brittleness and eddy currents have prevented it from being adopted over piezoelectric materials. A lot of researchers have applied it to Materials 2018, 11, 406; doi:10.3390/ma11030406 www.mdpi.com/journal/materials
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