Dynamic Experiments of Strain and Magnetic Field for Galfenol Rod and Its Modeling

Weng, Ling; Zhao, Qing; Sun, Yubao; Huang, Wenmei; Wang, Bowen; Busbridge, S.C.

doi:10.1109/tasc.2016.2517021

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…Simplification of (39) into the form of (38) gives the normalized storage modulus and loss factor of a resistivelyshunted magnetostrictive transducer,…”

Section: Transducer-level Mechanical Properties: Results and Discussionmentioning

confidence: 99%

“…The normalized storage modulus and loss factor of a magnetostrictive transducer with series resistive-capacitive shunt is obtained by rewriting (48) in the form of (38),…”

Section: Transducer-level Mechanical Properties: Results and Discussionmentioning

confidence: 99%

“…Many nonlinear constitutive models for these materials have been developed (e.g., [34][35][36]). For a summary of several recent models, the reader is referred to [37,38]. The use of these models in the proposed framework is outside the scope of this paper, because they will prevent the derivation of general analytical expressions.…”

Section: Discussionmentioning

confidence: 99%

“…Future work should study how the nonlinearity augments the linear responses that were derived herein. By describing the nonlinear constitutive behavior with a ratedependent model, such as in [38], it may be possible to simultaneously study the effects of eddy currents and nonlinearity. considered.…”

Section: Discussionmentioning

confidence: 99%

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Validated linear dynamic model of electrically-shunted magnetostrictive transducers with application to structural vibration control

Scheidler

Asnani

2017

Smart Mater. Struct.

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The performance of magnetostrictive materials, especially those with high initial magnetic permeability and associated low magnetic reluctance, is sensitive to not just the amount of magnetic bias but also how the bias is applied. Terfenol-D and Galfenol have been characterized under constant magnetic field and constant magnetomotive force, which require active control. The application of a magnetic flux bias utilizing permanent magnets allows for robust magnetostrictive systems that require no active control. However, this biasing configuration has not been thoroughly investigated. This study presents flux density versus stress major loops of Terfenol-D and Galfenol at various magnetic flux biases. A new piezomagnetic coefficient d 33 f is defined as the locally-averaged slope of flux density versus stress. Considering the materials alone, the maximum d 33 f is 18.42 T GPa −1 and 19.53 T GPa −1 for Terfenol-D and Galfenol, respectively. Compared with the peak piezomagnetic coefficient d 33 * measured under controlled magnetic fields, the piezomagnetic coefficient d 33 f is 26% and 74% smaller for Terfenol-D and Galfenol, respectively. This study shows that adding parallel magnetic flux paths to lowreluctance magnetostrictive components can partially compensate for the performance loss. With a low carbon steel flux path in parallel to the Galfenol specimen, the maximum d 33 f increased to 28.33 T GPa −1 corresponding to a 45% improvement compared with the case without a flux path. Due to its low magnetic permeability, Terfenol-D does not benefit from the addition of a parallel flux path.

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“…Simplification of (39) into the form of (38) gives the normalized storage modulus and loss factor of a resistivelyshunted magnetostrictive transducer,…”

Section: Transducer-level Mechanical Properties: Results and Discussionmentioning

confidence: 99%

“…The normalized storage modulus and loss factor of a magnetostrictive transducer with series resistive-capacitive shunt is obtained by rewriting (48) in the form of (38),…”

Section: Transducer-level Mechanical Properties: Results and Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Validated linear dynamic model of electrically-shunted magnetostrictive transducers with application to structural vibration control

Scheidler

Asnani

2017

Smart Mater. Struct.

View full text Add to dashboard Cite

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“…7 Hysteresis loops of strain versus magnetic field which were essential for Galfenol actuators at different frequencies from 1 Hz to 300 Hz were measured in a Fe 83 Ga 17 Galfenol rod sample. 8 The hysteresis loops of different heat treated Fe 81 Ga 19 ring-shaped samples were measured as a function of the frequencies from 0.25 Hz to 200 Hz and the coercivity was analyzed using different eddy-current-based models. 9 A key technical challenge is the limited experimental data on Galfenol's minor flux density loops response to dynamic magnetic field of high frequency, which is critically important for the design of Galfenol patch transducer used for ultrasonic guided Lamb wave (GLW) inspection techniques.…”

Section: Introductionmentioning

confidence: 99%

High frequency characterization of Galfenol minor flux density loops

Weng

Sun

et al. 2017

AIP Advances

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This paper presents the first measurement of ring-shaped Galfenol’s high frequency-dependent minor flux density loops. The frequencies of applied AC magnetic field are 1k, 5k, 10k, 50k, 100k, 200k, 300k, 500 kHz. The measurements show that the cycle area between the flux density and magnetic field curves increase with increasing frequency. High frequency-dependent characterization, including coercivity, specific power loss, residual induction, and maximum relative permeability are discussed. Minor loops for different max induction are also measured and discussed at the same frequency 100 kHz. Minor loops with the same max induction 0.05 T for different frequencies 50, 100, 200, 300, 400 kHz are measured and specific power loss are discussed.

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Dynamic discrete energy-averaged model for magnetostrictive materials

Deng

2017

Journal of Magnetism and Magnetic Materials

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Dynamic Experiments of Strain and Magnetic Field for Galfenol Rod and Its Modeling

Cited by 6 publications

References 14 publications

Validated linear dynamic model of electrically-shunted magnetostrictive transducers with application to structural vibration control

Validated linear dynamic model of electrically-shunted magnetostrictive transducers with application to structural vibration control

High frequency characterization of Galfenol minor flux density loops

Dynamic discrete energy-averaged model for magnetostrictive materials

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