Singularity at the Interface Edge of Bonded Transversely Isotropic Piezoelectric Dissimilar Materials

Theoretical analysis of the singular field near an interface edge of bonded axisymmetric transversely isotropic piezoelectric materials has been carried out. The eigenequation determining the singular order, and the stress and electric displacement fields are deduced in details. The results show that the singular order depends on the geometry shape of the interface edge and the material combination. It is found that the piezoelectric and dielectric constants have no effect on the singularity under the torsion loading condition, but have a complicated effect under axisymmetric deformation condition. It is of interest that the electric displacement also behaves as singular, and its magnitude can be described by the same parameter as the intensity coefficient of the stress field. The analysis of bonded axisymmetric piezo/isotropic materials has also been carried out.