Dynamic fatigue behavior of cracked piezoelectric ceramics in three-point bending under AC electric fields

Shindo, Yasuhide; Narita, Fumio; Saito, Fumitoshi

doi:10.1016/j.jeurceramsoc.2012.05.033

Cited by 16 publications

(9 citation statements)

References 22 publications

(20 reference statements)

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“…It has been noted that, in the presence of the magnetic field, the average fracture loads at 0.05, 0.50 and 3.0 Ns −1 are decreased respectively about 7%, 9% and 14%. Furthermore, Terfenol-D has shown a decrease in fracture load with a decrease in the loading rate, as other materials such as TiAl alloys (Cao et al, 2007) and piezoelectric ceramics (Shindo et al, 2009;Narita et al, 2012) have exhibited a similar behavior.…”

Section: Resultsmentioning

confidence: 97%

Recent Results on the Brittle Fracture of Terfenol-D Specimens under Magnetic Field

Colussi

Berto

Mori

et al. 2016

American Journal of Engineering and Applied Sciences

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Abstract:The following investigation has the purpose of describing, both experimentally and numerically, the fracture behavior of a giant magnetostrictive alloy commercially known as Terfenol-D. Single-edge precracked specimens have been analyzed via three-point bending tests, measuring fracture loads in the presence and absence of a magnetic field at various loading rates. The Strain Energy Density (SED), averaged in a finite control volume, has recently proved to be an excellent method of predicting brittle failures of cracked, U-and V-notched specimens made out of different materials. The effects of the magnetic field and of the loading rate on Terfenol-D failures have been studied, as well as discussing the ability of SED criterion to seize these effects, by performing coupled-field finite element analyses. Finally, a relationship between the size of the SED's control volume and the loading rate has been proposed and failures have then been estimated in terms of averaged SED.

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Section: Resultsmentioning

confidence: 97%

Recent Results on the Brittle Fracture of Terfenol-D Specimens under Magnetic Field

Colussi

Berto

Mori

et al. 2016

American Journal of Engineering and Applied Sciences

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“…Significant research has also been conducted on the fatigue crack behavior in piezoelectric ceramics. [172] Narita et al [173] investigated the fatigue of cracked PZT ceramics under a sinusoidal mechanical load and an AC electric field, and found that the slope of the curve representing the maximum energy release rate versus the number of cycles to failure becomes steeper when the AC electric field is applied. [171] Dynamic fatigue in cracked PZT ceramics under an AC electric field was then discussed.…”

Section: Electromagnetic Fatigue Crack Behaviormentioning

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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“…However, despite of the great attention that this alloy has gained in the industrial applications and though it is susceptible to in-service fracture due to its brittleness [2], very few works are available concerning the assessment of the influence of manufacturing induced defect and cracks on magnetostricitve material performances, notwithstanding the widely reported harmful effects of notches [3][4][5]. Moreover, the fracture behavior of these materials are highly affected by the presence of magnetic fields, since the fracture resistance uder mode I is inversely related to the intensity of the field Narita et al [6]. Regarding the determination of the fracture behavior of different materials, it is widely reported that brittle and high-cycle fatigue failures of components weakened by different notches geometries occur when the strain energy density (SED) averaged in a control volume surrounding a crack or notch tip reaches a critical value [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Fracture assessment of magnetostrictive materials

Peron

Razavi

Berto

et al. 2017

Frattura Ed Integrità Strutturale

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Giant magnetostrictive materials are gaining interest in the field of smart material, especially the commercially known Terfenol-D, that is an alloy made out of iron, terbium and dysprosium (Tb 0.3 Dy 0.7 Fe 1.9). Since these smart materials are subjected to both mechanical loads and magnetic field during their industrial applications, an extensive characterization on the influence of a magnetic field and of defects on their fracture behavior is needed. Very few works can be found in literature about this topic and, thus, the purpose of this work is to partially fill this lack by means of three-point bending tests on single-edge pre-cracked Terfenol-D specimens. Failure loads have been measured at different loading rates and under magnetic fields of various intensities. Since giant magnetostrictive materials are very brittle, the strain energy density (SED) approach has been exploited by means of couplefield finite element analyses. SED has revealed itself as a robust parameters in the assessment of the magnetic field and loading rate effects on fracture resistance, allowing also to propose a relationship between the radius of the control volume and the loading-rate.

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Dynamic fatigue behavior of cracked piezoelectric ceramics in three-point bending under AC electric fields

Cited by 16 publications

References 22 publications

Recent Results on the Brittle Fracture of Terfenol-D Specimens under Magnetic Field

Recent Results on the Brittle Fracture of Terfenol-D Specimens under Magnetic Field

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

Fracture assessment of magnetostrictive materials

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