TWO COPLANAR CRACKS IN A FUNCTIONALLY GRADED PIEZOELECTRIC MATERIAL STRIP UNDER MECHANICAL AND TRANSIENT THERMAL LOADINGS
In this paper, the fracture problem of a functionally graded piezoelectric material strip (FGPM strip) containing two coplanar cracks perpendicular to its boundaries is considered. The problem is solved for an FGPM strip that is suddenly heated from the bottom surface under static mechanical loading. The top surface is maintained at the initial temperature. The crack faces are supposed to be completely insulated. Material properties are assumed to be exponentially dependent on the distance from the bottom surface. By using the Laplace and Fourier transforms, the thermoelectromechanical fracture problem is reduced to a set of singular integral equations, which are solved numerically. The stress intensity factors for the cases of the two embedded cracks, two edge cracks, and an embedded and an edge cracks are computed and presented as a function of the normalized time, the nonhomogeneous and geometric parameters.
functionally gradient materials fracture mechanics coplanar cracks thermal shock
Sei Ueda
Department of Mechanical Engineering, Osaka Institute of Technology,5-16-1 Omiya, Asahi-ku, Osaka, 535-8585, JAPAN
国际会议
南京
英文
239-242
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）