When the finite element simulation method is used to study the cutting mechanism of titanium alloy

different damage evolution models and their parameter settings greatly affect the reliability and accuracy of the results. In this paper

a three-dimensional turning model for titanium alloy finishing is established via ABAQUS

and the turning process of Ti6Al4V is simulated with the different damage evolution models (fracture energy and failure displacement). In view of the fact that the failure displacement in the damage evolution model is difficult to be reasonably valued in modeling

a failure displacement value method is given. According to the unit size

three groups of different failure displacement values are set for simulating the cutting

and then the law of failure displacement value is summarized. Finally

the effects of the two damage evolution models on the cutting force

chip morphology and residual stress are compared. The results show that under the same processing parameters

the simulation accuracy is more accurate when the failure displacement is close to the cell size. The damage evolution model based on failure displacement is more convenient than the damage evolution model based on the fracture energy

and which has good consistency with the test results.