Interaction of a Screw Dislocation with an Interfacial Crack in Two Dissimilar Piezoelectric Layers

Abstract:

A screw dislocation interacting with a semi-infinite interfacial crack in two dissimilar piezoelectric layers is studied. The complex variable method and the conformal mapping technique are employed to obtain the solution of the problem. The stress and electric displacement intensity factors are given explicitly. We find that the stress and electric displacement intensity factors depend on the effective electro-elastic material constants. Numerical example shows that the influence of piezoelectric effect on the crack tip shielding is significant.

• Periodical: Key Engineering Materials (Volumes 261-263)
• Pages: 141-146
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.261-263.141
• Online since: April 2004
• Authors: Jin Xi Liu, Ai Ping Liu, Z.Q. Jiang, Ai Kah Soh
• Keywords: Interfacial Crack, Piezoelectric Material, Screw Dislocation, Shielding Effect

References

[1] J. Weertman, Dislocation based fracture Mechanics. World Scientific, Hong Kong (1996).

[2] B.S. Majumdar and S.J. Burns, Acta Mater, 29 (1981) p.579.

[3] K.Y. Lee, W.G. Lee and Y.E. Pak, Journal of Applied Mechanics, 67 (2000) p.165.

[4] J.H. Kwon and K.Y. Lee, Journal of Applied Mechanics, 69 (2002) p.55.

[5] T.Y. Zhang, T.H. Wang and M.H. Zhao, Philosophical Magazine A, 82 (2002) p.2805.

[6] A.K. Soh, J.X. Liu and D.N. Fang, Physica Status Solidi (b), 232 (2002) p.273.

[7] Y.E. Pak, Journal of Applied Mechanics, 57 (1990) p.863.

[8] J.X. Liu, X.Q. Wang and A.K. Soh, Mechanics of Electromagnetic Solids (J.S. Yang and G.A. Maugin, ed. ), Kluwer Academic Publishers (2003) p.173.