Analysis and Testing of Indentation Fracture Behavior of Piezoelectric Ceramics Under an Electric Field

Shindo, Yasuhide; Oka, Masahide; Horiguchi, Katsumi

doi:10.1115/1.1370370

Cited by 32 publications

(23 citation statements)

References 27 publications

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“…They include compact tension, three and fourpoint bending tests, indentation fracture techniques and the double torsion test (Qin 2001). Many tests have been carried out with the indentation technique (Tobin and Pak 1993;Lynch 1998;Shindo et al 2001;Schneider et al 2003). For many fracture experiments, polarized piezoelectric ceramics have been treated to be isotropic and use was made of purely mechanical calibrations for the stress intensity factor K I (Freiman et al 1974;Bruce et al 1978;McHenry and Koepke 1983;Pohanka et al 1983;Tobin and Pak 1993;Zhang et al 2004).…”

Section: Introductionmentioning

confidence: 99%

On fracture testing of piezoelectric ceramics

2009

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Fracture tests carried out on unpoled and poled PZT-5H four-point bend specimens are presented in this paper. The crack faces were parallel to the poling direction. Both mechanical loads and electric fields were applied to the poled specimens. The experimental results were analyzed by means of the finite element method and a conservative M-integral including the crack face boundary conditions. Fracture tests on fourpoint bend PIC-151 specimens with the crack faces perpendicular to the poling directions were also analyzed here; the experimental results were taken from the literature. A mixed mode fracture criterion is proposed for piezoelectric ceramics. This criterion is based upon the energy release rate and two phase angles. This criterion was implemented with experimental results from the literature and from this investigation. Excellent agrement was found between the fracture curve and the experimental results of the specimens with the crack faces perpendicular to the poling direction. With some scatter, reasonable agreement was observed between the fracture curve and the experimental results of the specimens with crack faces parallel to the poling direction.

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Section: Introductionmentioning

confidence: 99%

On fracture testing of piezoelectric ceramics

2009

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“…Interlaminar fracture test ASTM D5528 has already been shown to be a useful test at low temperature by Shindo et al [13]. Shindo found that work of fracture (G) increases at 77K then falls back to approximately room temperature values at 4K.…”

Section: Interlaminar Work Of Fracture Testingmentioning

confidence: 99%

Insulation Development for the Next European Dipole

Canfer¹,

Baynham²,

Greenhalgh³

2006

AIP Conference Proceedings

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Electrical insulation is one of the most challenging issues governing the engineering exploitation of niobium-tin conductors. This is especially true for future accelerator magnets manufactured by the "wind-and-react" route. Applications such as the LHC Interaction Region upgrade or in the longer term an LHC energy upgrade will require magnets to operate at high fields in demanding thermal and radiation environments. The Next European Dipole (NED) programme is aimed at the development of a large aperture (up to 88mm) high field (up to 15T conductor peak field) superconducting dipole magnet relying on niobium-tin conductors. Conventional insulation development is being addressed in two key areas, the engineering requirements for large scale magnet manufacture and the improvement of materials properties for magnet operation and performance. The paper will review the status of insulation technology for niobium-tin accelerator magnets and define the special requirements for NED. Particular emphasis will be placed on the development of fibre sizing technology and its influence on magnet manufacture and electrical/mechanical performance of insulation laminates. This work is supported in part by the European Community ABSTRACTElectrical insulation is one of the most challenging issues governing the engineering exploitation of niobium-tin conductors. This is especially true for future accelerator magnets manufactured by the "wind-and-react" route. Applications such as the LHC Interaction Region upgrade or in the longer term an LHC energy upgrade will require magnets to operate at high fields in demanding thermal and radiation environments. The Next European Dipole (NED) programme is aimed at the development of a large aperture (up to 88mm) high field (up to 15T conductor peak field) superconducting dipole magnet relying on niobium-tin conductors. Conventional insulation development is being addressed in two key areas, the engineering requirements for large scale magnet manufacture and the improvement of materials properties for magnet operation and performance. The paper will review the status of insulation technology for niobium-tin accelerator magnets and define the special requirements for NED. Particular emphasis will be placed on the development of fibre sizing technology and its influence on magnet manufacture and electrical/mechanical performance of insulation laminates.

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“…According to the fracture mechanics interpretation, a negative energy release rate would correspond to a crack that could absorb energy due to crack extension. Since this would exclude the fracture in piezoelectric ceramics under electric fields, in contradiction with the experimental observations [Park and Sun 1995;Shindo et al 2001Shindo et al , 2005, the parameters for the impermeable and open crack models have questionable physical significance. Therefore, the electrical boundary conditions (B.1) and (B.2) are not appropriate for a slit crack in piezoelectric ceramics, and the permeable crack model can be used to calculate the G of the specimens.…”

Section: Discussionmentioning

confidence: 83%

Dynamic fatigue of cracked piezoelectric ceramics under electromechanical loading: three-point bending test and finite element analysis

Shindo

Narita

Hirama

2009

J. Mech. Mater. Struct.

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This paper studies the dynamic fatigue or slow crack growth in piezoelectric ceramics under electromechanical loading by a combined numerical-experimental approach. Constant load-rate testing was conducted in three-point flexure using the single-edge precracked-beam specimens under zero and positive electric fields, and the effects of electric field and loading-rate on the fracture load and crack propagation were examined. A finite element analysis was also employed to calculate the energy release rate for the permeable, impermeable and open crack models, and the effect of electric field on the energy release rate was discussed. Crack propagation velocity versus energy release rate curves at various loading-rate were then estimated based on the finite element analysis using measured data.

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Analysis and Testing of Indentation Fracture Behavior of Piezoelectric Ceramics Under an Electric Field

Cited by 32 publications

References 27 publications

On fracture testing of piezoelectric ceramics

On fracture testing of piezoelectric ceramics

Insulation Development for the Next European Dipole

Dynamic fatigue of cracked piezoelectric ceramics under electromechanical loading: three-point bending test and finite element analysis

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