Showing papers by "Shanyi Du published in 2002"

Investigation of Antiplane Shear Behavior of Two Collinear Permeable Cracks in a Piezoelectric Material by Using the Nonlocal theory

Abstract: In the theoretical studies of crack problems, several differ electric boundary conditions at the crack surfaces in piezoele materials have been proposed by numerous researchers ~@1–4#!. However, these solutions contain stress and electric displace singularity. This is not reasonable according to the physical ture. To overcome the stress singularity in the classical ela theory, Eringen@5# used the nonlocal theory to study the state stress near the tip of a sharp line crack in an elastic plate subje to antiplane shear. The solution did not contain any stress sin larity. Recently, the same problems have been resolved in Zh papers~@6#! by using the Schmidt method. In this paper, the behavior of two collinear symmetric crac subjected to the antiplane shear loading in the piezoelectric m rials is investigated by using the Schmidt method and the nonl theory for permeable crack surface conditions. The traditio concept of linear elastic fracture mechanics and the nonlo theory are extended to include the piezoelectric effects. As pected, the solution in this paper does not contain the stress electric displacement singularity at the crack tip.