Thin-layer magnetostrictive composite films for turbomachinery fan blade damping

Pulliam, Wade J.; Lee, Donggun; Carman, Gregory P.; McKnight, Geoffrey P.

doi:10.1117/12.483725

Cited by 6 publications

(5 citation statements)

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“…While there are many reported benefits of carbon nanotubes and carbon nanofibers in composites, the potential of carbon nanotubes and carbon nanofibers to enhance the damping properties of composites has been less explored. Traditional damping enhancements of composites are based on viscoelastic polymer materials [15], carbon fiber prepregs [16], and magnetostrictive particles [17]. The major limitations of the viscoelastic polymer materials are the structural integrity issue, the sacrifice of stiffness and strength of the composite system due to the resin penetration, and poor thermal stability.…”

Section: Introductionmentioning

confidence: 99%

“…Magnetostrictive particles have been used in a polymer matrix as active transducer and passive damper, providing stiffness and strength while incorporating damping capabilities. Pulliam et al [17] developed a novel manufacturing technique based on magnetic fields to distribute magnetostrictive 2 Journal of Nanomaterials particles in polymer resins and applied them in thin-layer on the surfaces for vibration damping. Recently, carbon nanotubes have been used in the composite system for structural damping and stiffness augmentation.…”

Section: Introductionmentioning

confidence: 99%

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Damping Augmentation of Nanocomposites Using Carbon Nanofiber Paper

Gou

O'Braint

et al. 2006

Journal of Nanomaterials

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Vacuum-assisted resin transfer molding (VARTM) process was used to fabricate the nanocomposites through integrating carbon nanofiber paper into traditional glass fiber reinforced composites. The carbon nanofiber paper had a porous structure with highly entangled carbon nanofibers and short glass fibers. In this study, the carbon nanofiber paper was employed as an interlayer and surface layer of composite laminates to enhance the damping properties. Experiments conducted using the nanocomposite beam indicated up to 200–700% increase of the damping ratios at higher frequencies. The scanning electron microscopy (SEM) characterization of the carbon nanofiber paper and the nanocomposites was also conducted to investigate the impregnation of carbon nanofiber paper by the resin during the VARTM process and the mechanics of damping augmentation. The study showed a complete penetration of the resin through the carbon nanofiber paper. The connectivities between carbon nanofibers and short glass fibers within the carbon nanofiber paper were responsible for the significant energy dissipation in the nanocomposites during the damping tests.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Damping Augmentation of Nanocomposites Using Carbon Nanofiber Paper

Gou

O'Braint

et al. 2006

Journal of Nanomaterials

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“…Following Faraday's law, magnetic energy variation introduces an electrical potential across the shunted circuit, which induces additional energy dissipation through Joule heating. The hysteresis loss of magnetostrictive materials has been measured from monolithic elements [11][12][13][14][15], microscale thin films [16], and particulate composites [17]. Eddy current loss of magnetostrictive materials has been analyzed numerically [18,19] and characterized experimentally [20,21].…”

Section: E(h T) = T S E + λ(H T)mentioning

confidence: 99%

Shunted magnetostrictive devices in vibration control

Deng¹,

Scheidler²,

Asnani³

et al. 2020

Smart Mater. Struct.

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Structural vibrations in rotating machinery may lead to imprecise motion control, excessive noise, or even structural damage. Magnetostrictive materials can dissipate unwanted vibrations via hysteresis, eddy currents, and joule heating while exhibiting an electrically-tunable elastic modulus. Harnessing this feature, this article presents a shunted magnetostrictive device that includes an iron-gallium (Galfenol) rod, a permanent magnet array, a flux return path, and shunt circuits. The stiffness tunability and damping of this passive device are measured under a 750 Hz sinusoidal axial compression for resistive, capacitive, and inductive shunt circuits. The effect of eddy currents stiffness and damping is investigated for the first time by comparing results from laminated and solid Galfenol rods. Solid Galfenol produces larger eddy current-based damping, while laminated Galfenol enables larger stiffness variation and total damping. This device demonstrates a power density of 19.83 mW cm−3 for vibration energy harvesting. The frequency-dependent behavior of the shunted device is tested from 5 Hz to 1 kHz for selected electrical loads.

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“…The arc-melt MPC is able to provide a maximum loss factor of 0.09 while maintaining a high Young's modulus of about 10GPa. Pulliamet al [81] later applied a thin layer of MPC on top of a turbomachinery fan blade and achieved a 35% increment in structural damping.…”

Section: Passive Controlmentioning

confidence: 99%

Review of magnetostrictive materials for structural vibration control

Deng

Dapino

2018

Smart Mater. Struct.

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Excessive vibrations in civil and mechanical systems can cause structural damage or detrimental noise. Structural vibrations can be mitigated either by attenuating energy from vibration sources or isolating external disturbance from target structures. Magnetostrictive materials coupling mechanical and magnetic energies have provided innovative solutions to vibration control challenges. Depending on the system's tunability and power consumption, the existing vibration control strategies are categorized into active, passive, and semi-active types. This article first summarizes the unique properties of magnetostrictive materials that lead to compact and reliable vibration control strategies. Several magnetostrictive vibration control mechanisms together with their performance are then studied using lumped parameter models. Finally, this article reviews the current state of vibration control applications utilizing magnetostrictive materials, especially Terfenol-D and Galfenol.

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Thin-layer magnetostrictive composite films for turbomachinery fan blade damping

Cited by 6 publications

References 0 publications

Damping Augmentation of Nanocomposites Using Carbon Nanofiber Paper

Damping Augmentation of Nanocomposites Using Carbon Nanofiber Paper

Shunted magnetostrictive devices in vibration control

Review of magnetostrictive materials for structural vibration control

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