Application of finite-part integrals to three-dimensional fracture problems for piezoelectric media - Part I: Hypersingular integral equation and theoretical analysis

作者：Chen MC^*

来源：International Journal of Fracture, 2003, 121(3-4): 133-148.

DOI：10.1023/B:FRAC.0000005344.23327.f6

• piezoelectric material
• three-dimensional fracture mechanics
• hypersingular integral equation
• stress and electric displacement field
• stress and electric displacement intensity factor
• energy release rate

This paper deals with some basic linear elastic fracture problems for an arbitrary-shaped planar crack in a three-dimensional infinite transversely isotropic piezoelectric media. The finite-part integral concept is used to derive hypersingular integral equations for the crack from the point force and charge solutions with distinct eigenvalues s(i) (i = 1, 2, 3) of an infinite transversely isotropic piezoelectric media. Investigations on the singularities and the singular stress fields and electric displacement fields in the vicinity of the crack are made by the dominant-part analysis of the two-dimensional integrals. Thereafter the stress and electric displacement intensity factor K-fields and the energy release rate G are exactly obtained by using the definitions of stress and electric displacement intensity factors and the principle of virtual work, respectively. The hypersingular integral equations under axially symmetric mechanical and electric loadings are solved analytically for the case of a penny-shaped crack.

• 出版日期2003-6
• 单位华东交通大学