In order to accurately predict the damage process of solid particle erosion in TC4 titanium alloy materials, explicit dynamic finite element analysis was employed. An elastoplastic finite element model was established to simulate the dynamic erosion process of multiple particles in a three-dimensional structure. This simulation incorporated the Johnson-Cook material model and the strain cumulative failure mod-el. Results showed that the maximum plastic deformation occurred at the first collision and decreased with the increase of the number of colli-sions. The erosion angle and velocity significantly affected the contact time between the particles and the target surface, and the kinetic energy loss increased with an increase in the erosion velocity and angle. At low erosion angles, the dynamic erosion process exhibited multiple peaks and troughs in tangential and normal contact forces, with the erosion mechanism primarily involving plastic deformation and tangential shearing. At high erosion angles, spherical particles effectively simulated the shearing and compressive actions on the material during the erosion process. The effects of the incident angle and velocity on the continuous multi-particle erosion behavior were explained from a microscopic mechanism perspective, clarifying the dynamic erosion mechanisms and geometric evolution of erosion pits.
关键词
TC4/冲蚀角度/冲蚀速度/动能损失率/接触时间/冲蚀率
Key words
TC4/erosion angle/erosion velocity/kinetic energy loss rate/contact time/erosion rate
维普
万方数据