This is part II of the work concerned with finding the stress intensit
y factors for a circular crack in a solid with piezoelectric behavior.
The method of solution involves reducing the problem to a system of h
ypersingular integral equations by application of the unit concentrate
d displacement discontinuity and the unit concentrated electric potent
ial discontinuity derived in part I [1]. The near crack border elastic
displacement, electric potential, stress and electric displacement ar
e obtained. Stress and electric displacement intensity factors can be
expressed in terms of the displacement and the potential discontinuity
on the crack surface. Analogy is established between the boundary int
egral equations for arbitrary shaped cracks in a piezoelectric and ela
stic medium such that once the stress intensity factors in the piezoel
ectric medium can be determined directly from that of the elastic medi
um. Results for the penny-shaped crack are obtained as an example.