Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Domain Switching Toughening of Ferroelectric Ceramics Subjected to Electric Fields

전기장을 받는 강유전체 세라믹의 분역회전 인성화

  • 정경문 (전남대학교 대학원 기계공학과) ;
  • 범현규 (전남대학교 기계공학과)
  • Published : 2003.04.01
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Abstract

A crack with growth in ferroelectric ceramics under purely electric loading is analyzed. The crack tip stress intensity factor for the growing crack under small-scale conditions is evaluated by employing the model of nonlinear domain switching. The crack tip stress intensity factor increases or decreases with crack growth, depending on the electrical nonlinear behavior and the direction of an applied electric field. It is shown that the ferroelectric material can be either toughened or weakened as the crack grows. The steady state crack growth in ferroelectric ceramics is also discussed.

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References

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