Structural Engineering and Mechanics

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Transient response of a piezoelectric layer with a penny-shaped crack under electromechanical impacts

  • Feng, Wenjie (Department of Mechanics and Engineering Science, Shijiazhuang Railway Institute) ;
  • Li, Yansong (Department of Mechanics and Engineering Science, Shijiazhuang Railway Institute) ;
  • Ren, DeLiang (Department of Mechanics and Engineering Science, Shijiazhuang Railway Institute)
  • Received : 2005.06.27
  • Accepted : 2006.02.03
  • Published : 2006.05.30
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Abstract

In this paper, the dynamic response of a piezoelectric layer with a penny-shaped crack is investigated. The piezoelectric layer is subjected to an axisymmetrical action of both mechanical and electrical impacts. Two kinds of crack surface conditions, i.e., electrically impermeable and electrically permeable, are adopted. Based upon integral transform technique, the crack boundary value problem is reduced to a system of Fredholm integral equations in the Laplace transform domain. By making use of numerical Laplace inversion the time-dependent dynamic stress and electric displacement intensity factors are obtained, and the dynamic energy release rate is further derived. Numerical results are plotted to show the effects of both the piezoelectric layer thickness and the electrical impact loadings on the dynamic fracture behaviors of the crack tips.

Keywords

References

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