Singularity of Electromechanical Coupling Field in Piezoelectric Composite Junctions

Table 1

The first four singularity orders of the interface crack with interval segmentation number N.

N
10	−0.510769–0.0406356 i	−0.510769 + 0.0406356 i	0.504289–0.0455896 i	0.504289 + 0.0455896 i
20	−0.502625–0.0448070 i	−0.502625 + 0.0448070 i	0.500793–0.0440447 i	0.500793 + 0.0440447 i
30	−0.500487–0.0444804 i	−0.500487 + 0.044480a4 i	0.500149–0.0440330 i	0.500149 + 0.0440330 i
40	−0.500063–0.0442202i	−0.500063 + 0.0442202 i	0.500035–0.0440385 i	0.500035 + 0.0440385 i
50	−0.499986–0.0441066 i	−0.499986 + 0.0441066 i	0.500010–0.0440370 i	0.500010 + 0.0440370 i
60	−0.499978–0.0440604 i	−0.499978 + 0.0440604 i	0.500003–0.0440345 i	0.500003 + 0.0440345 i
70	−0.499982–0.0440414 i	−0.499982 + 0.0440414 i	0.500001–0.0440325 i	0.500001 + 0.0440325 i
80	−0.499987–0.0440334 i	−0.499987 + 0.0440334 i	0.500000–0.0440311 i	0.500000 + 0.0440311 i
Ref. [15]	−0.5–0.044i	−0.5 + 0.044i	—	—

Note: is the imaginary number.