Abstract: The rectangular beam with dual surface bondedpiezoelectric actuators can achieve a pure bending deformationby an external electric field. The strain distribution of the actuatorsand the beam are analyzed and based on the analytical expressionsof strains, the directional attached piezoelectric elements, instead ofthe conventional attached piezoelectric elements, are used as actuatorsto reduce their effective transverse stiffness and enhance the actuatingeffectiveness. In the end, the deformations of two beams withdirectionally attached piezoelectric elements and the conventionalpiezoelectric elements are compared by static experiments.