TiO2/PVDF composite materials have excellent high dielectric properties and have wide application prospects in the fields of high voltage and energy storage insulation.In this paper

the finite element method was used to simulate the structure and performance of TiO2/PVDF composite material system. By establishing two dimensional and three dimensional models

the breakdown mechanism of composite material was systematically studied from the perspectives of electric field intensity

leakage current density

and system energy density distribution

studying the influence of TiO2 shape on the dielectric performance of composite material.The results of the research show that doping 5 vol% TiO2 components

compared to the spherical TiO2/PVDF composites

the linear TiO2/PVDF composites system of electric field intensity

the leakage current density and energy density distribution is relatively uniform

the distortion of the three physical quantities is small

high electric field intensity

leakage current density and energy density area decreased significantly.On the surface of the composite

the highest electric field strength

leakage current density and energy density are reduced 1.42 times

1.41 times

2.01 times. From the inside of the composite

the average electric field strength

leakage current density and energy density are reduced respectively 1.25 times

1.19 times

and 1.52 times.The simulation results show that linear TiO2/PVDF composite has stronger breakdown resistance. This research can provide a theoretical basis for the preparation of new materials with high dielectric properties.