3D Gear Fracture Numerical Analysis and Simulation of Expansion

Three-dimensional model of the gear is built and we use boundary element analysis software FRANC3D base on boundary element method to calculate the stress intensity factors on the different locations of three-dimensional surface crack,and then do the crack extension simulation.It proposes the evaluation rules of defects which can cause cracks,showing the feasibility of FRANC3D in numerical analysis,forecasting and simulation with initial gear crack or defects.This paper gives a reference to the life prediction of the gear and the optimization design for the gears.