Abstract
Carbon fiber reinforced plastic (CFRP) is an excellent choice in the areas where weight reduction is important and multi-functionalization of CFRP, especially by adding sensor capabilities, is a promising approach to realize lightweight battery-free devices in structural health monitoring (SHM). In this study, we fabricated hybrid CFRP with Fe-Co fibers and evaluated the inverse magnetostrictive response characteristics. It was shown that the measured magnetic flux density of the CFRP fluctuates in response to cyclic bending load. It was also revealed that our Fe-Co fiber inserted CFRP has damage self-sensing ability. In addition, it seems that the optimization of design and more experimental and numerical investigation improves the capability of the hybrid CFRP with Fe-Co fiber as sensor composite materials.
Highlights
Structural health monitoring (SHM) is an emerging research area with applications in critical structures, for example, aerospace, civil, and mechanical structures [1]
The Fe-Co fibers were inserted between Carbon fiber reinforced plastic (CFRP) prepregs
The Fe-Co fibers were inserted between CFRP prepregs (F6343B-05P, Toray Industries, Inc., Tokyo, Japan), and Young’s modulus of Fe-Co fiber and carbon fiber in the prepreg are approximately
Summary
Structural health monitoring (SHM) is an emerging research area with applications in critical structures, for example, aerospace, civil, and mechanical structures [1]. The sensor types for SHM include strain gage, fiber Bragg gratings, piezoelectric materials and so forth [2]. The monitoring systems using them have been developed to evaluate various damage modes in a structure with minimal cost [3]. The use of inverse magnetostriction is a good approach for SHM, and low-cost materials with large magnetostriction are necessary [4]. Tbx Dy1−x Fey (0.27 ≤ x ≤ 0.30, 1.9 ≤ y ≤ 2.0), known as Terfenol-D, has giant magnetostriction and low magneto-crystalline anisotropy [5]. Calkins et al have reviewed that Terfenol-D can be widely utilized as a sensor [6]. Fe-Ga alloy, known as Galfenol, exhibits large magnetostriction, and Hein et al have studied its characteristics as a toque sensor [7].
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