CALCULATION OF THE ELECTROELASTIC GREENS-FUNCTION OF THE HEXAGONAL INFINITE MEDIUM

The electroelastic 4 x 4 Green's function of a piezoelectric hexagonal (transversely isotropic) infinitely extended medium is calculated exp licitly in closed compact form ((73) ff. and (88) ff., respectively) b y using residue calculation. The results can also be derived from Fred holm's method [2]. In the case of vanishing piezoelectric coupling the derived Green's function coincides with two well known results: Krone r's expressions for the elastic Green's function tensor [4] is reprodu ced and the electric part then coincides with the electric potential ( solution of Poisson equation) which is caused by a unit point charge. The obtained electroelastic Green's function is useful for the calcula tion of the electroelastic Eshelby tensor [16].