한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제22권2호
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  • Pages.113-119
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  • 2005
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  • 1225-9071(pISSN)
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  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

분역회전이 강유전체 세라믹 액추에이터 내의 균열발생에 미치는 영향

Effect of Domain Switching on Cracking in Ferroelectric Ceramic Actuators

  • 정경문 (전남대학교 대학원 기계공학과) ;
  • 김재연 (전남대학교 대학원 기계공학과) ;
  • 범현규 (인하대학교 기계공학과)
  • 발행 : 2005.02.01
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⟨ 이전 논문 다음 논문 ⟩

초록

A crack emanating from an internal electrode or a conducting damage path in ferroelectric ceramic actuators is analyzed. The boundary of the domain switching zone near the edge of the internal electrode in a ceramic multilayer actuator is determined based on the nonlinear electric theory. The stress intensity factor induced by a ferroelectric domain switching under small scale conditions is numerically obtained for flaws of various sizes near the electrode edge. It is found that stress intensity factor near the crack tip depends on the material property of the electrical nonlinearity.

키워드

참고문헌

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