Composite Eshelby model and domain band geometries of ferroelectric ceramics

Yang, Wei; Wang, Hong-Tao; Cui, Yuanqing

doi:10.1007/bf02916692

Cited by 10 publications

(2 citation statements)

References 15 publications

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“…For the case of a stationary crack, the expressions for AK(D and AK(2)can be simplified from (14), (15) and (16) with the help of a circular switching zone. The combination of these results gives 2#%KE 23--5~ AK ----15~rEc ~ + 1 (24)…”

Section: A Stationary Crackmentioning

confidence: 99%

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Toughening of ferroelectrics by the out-of-plane poling

Yang

Fang

2003

Acta Mech Sinica

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Subjected to the prior out-of-plane poling, the ferroelectrics can be toughened considerably. The present paper describes the variation of the stress intensity factor (SIF) by 90 ~ switching in ferroelectrics. The analysis is carried out for the combined mechanical and electrical loading, with simple relations obtained for the case of the purely electrical loading. The out-of-plane poling is found to raise the SIF for the crack initiation, but appreciably reduces the SIF for the crack growth in a steady state. More stable fracture resistance curves can be achieved by the out-of-plane poling. This prediction is supported quantitatively by the testing data of SENB specimens of PZT-5 samples, when the toughening effects of polings in three orthogonal directions are compared.

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Section: A Stationary Crackmentioning

confidence: 99%

“…The measurement[ 15] and analysis[16] indicated a value of gf = 0.35. The value of gf is determined by finding the domain band configuration with a minimum free energy.…”

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confidence: 95%