  We discuss a model that considers the bulk composite as a homogeneous medium
with piezoelectric and magnetostrictive subsystems. We solve combined
elastostatic, electrostatic and magnetostatic equations to obtain effective
composite parameters (piezoelectric modules, magnetostriction factors,
compliances, magnetoelectric coefficients) for 3-0 and 0-3 connectivities.
Expressions for longitudinal and transverse low-frequency magnetoelectric
voltage coefficients have been obtained for unclamped and clamped samples.
Volume fractions for peak low-frequency effective magnetoelectric voltage
coefficient are found to be dependent on specific connectivity. Clamping leads
to significant variation in magnetoelectric voltage coefficients. The
calculated magnetoelectric coefficients are compared with data.
