Fdtd Modeling Of Stress Source In Piezoelectric Materials

In order to better study the electromagnetic radiation caused by the stress in piezoelectric materials, the stress source model in piezoelectric materials is proposed by the finite difference time domain (FDTD) method./we propose a finite difference time domain (FDTD) modeling of stress source in piezoelectric materials. Firstly, the relationship between stress and the voltage generated by stress is obtained through the piezoelectric effect. Then the stress source is compared to a lumped voltage source, and the relationship between stress and voltage is combined with the FDTD update equation of a lumped voltage source to obtain the FDTD update equation of the stress source in the piezoelectric material. The FDTD update equation can be used to calculate the time-domain characteristics of the field of piezoelectric materials, including electric field, magnetic field and stress field. The model also lays a foundation for solving the radiation field of multiferroic materials.