To address the nonlinear modeling of piezoelectric bimorph actuators, a method is proposed based on the Hammerstein structure. This approach connects the linear dynamic and nonlinear static modules of the system in series, and a modeling and parameter identification method for piezoelectric bimorphs is introduced based on the Jiles-Atherton model. To verify the accuracy of the model, finite element simulations and experimental tests were conducted and compared. The static/dynamic comparison results indicated hysteresis nonlinearities of 18.1%, 17.9%, and 19.3% for the theoretical model, simulation, and experiments, respectively. Additionally, the average relative errors in the step response of simulations and experimental tests with respect to the theoretical model were 5.2% and 4.1%, highlighting the accuracy and effectiveness of the proposed modeling approach.