The effects of crack face boundary conditions of the piezoelectric fracture mechanics are discussed by analyzing the plane strain electroelastic problem of an orthotropic piezoelectric ceramic strip with a central permeable or impermeable crack. The problem of a long strip is formulated by means of integral transforms and reduced to the solution of a system of Fredholm integral equations of the second kind. Fracture mechanics parameters such as stress intensity factor, energy release rate and energy density factor based on both permeable model and impermeable model are compared. A finite element method is also used to calculate these fracture mechanics parameters, and the results are compared with the exact solutions. The numerical results illustrate that the impermeable assumption can lead to significant errors regarding the effects of the electric fields on crack propagation.
|ジャーナル||Theoretical and Applied Mechanics Japan|
|出版ステータス||Published - 2002 12 1|
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials