기능 경사 압전 세라믹 스트립의 균열에 관한 연구

The Crack Problem for Functionally Graded Piezoelectric Ceramic Strip

  • 발행 : 2002.08.01

초록

면외전단하중(anti-plane shear loading)을 받는 기능경사 압전 세라믹 무한 스트립(functionally graded piezoelectric ceramic strip)의 상하 양쪽 끝단의 중앙에 평행하게 존재하는 유한한 크기의 균열(Griffith crack)에 대한 특이응력(singular stress)과 전기장(electric field)을 선형 압전 이론(theory of linear piezoelectricity)을 이용하여 결정한다. 푸리에 변환(Fourier transform)을 이용하여 복합적분 방정식을 구성하며, 이를 제2종 Fredholm 적분 방정식(Fredholm integral equation of the second kind) 으로 표현한다. 또한 응력세기계수(stress intensity factor)와 에너지 해방률(energy release rate)에 대한 수치 결과를 제시하였다.

We consider the problem of determining the singular stresses and electric fields in a functionally graded piezoelectric ceramic strip containing a Griffith eccentric crack under anti-plane shear loading with the theory of linear piezoelectricity. Fourier transforms are used to reduce the problem to the solution of two pairs of dual integral equations, which are then expressed to a Fredholm integral equation of the second kind. Numerical values on the stress intensity factor and the energy release rate are obtained.

키워드

참고문헌

  1. Ph. D. Thesis, Stanford University The Analysis of Dislocation, Crack, and Inclusion Problems in Piezoelectric Solids W. F. Deeg
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  4. Acta Mechanica v.120 Singular Stress and Electric Fields of a Piezoelectric Ceramic Strip with a Finite Crack Under Longitudinal Shear Y. Shindo;K. Tanaka;F. Narita https://doi.org/10.1007/BF01174314
  5. International Journal of Solids and Structures v.37 Analysis of Stress and Electric Fields in a Rectangular Piezoelectric Body with a Center Crack Under Anti-Plane Shear Loading S. M. Kwon;K. Y. Lee https://doi.org/10.1016/S0020-7683(99)00186-9
  6. International Journal of Engineering Science v.37 A general solution for the plane problem in piezoelectric media with collinear crack C. F. Gao;W. X. Fan https://doi.org/10.1016/S0020-7225(98)00067-6
  7. ASME, Journal of Applied Mechanics v.52 The crack problem for bonded nonhomogeneous materials under antiplane shear loading F. Erdogan https://doi.org/10.1115/1.3169153