Peridynamics Simulation and Experimental Investigation of Chip Formation Process During Machining of Ti2AlNb
LIU Hao1,2, WANG Bing1,2, LIU Zhanqiang1,2, LI Liangliang3, CAI Yukui1,2, SONG Qinghua1,2
1. Key Laboratory of High Efficiency and Clean Mechanical Manufacture of MOE, School of Mechanical Engineering, Shandong University, Jinan 250061;
2. National Demonstration Center for Experimental Mechanical Engineering, Shandong University, Jinan 250061;
3. AVIC Shenyang Aircraft Industry (Group) Co., Ltd., Shenyang 110850
Based on the idea of nonlocal theory, peridynamics describes the movement of material particles by solving spatial integral equations. It is suitable for describing the crack growth and fracture behavior of workpiece materials during severe plastic deformation in cutting process. In this paper, the elastoplastic constitutive model of Ti2AlNb is constructed based on ordinary state-based peridynamics, and material failure and contact criteria are developed. By solving discrete basic motion equations, a state-based peridynamics numerical model is established to study the cutting process of Ti2AlNb alloy. Then the chip formation process for orthogonal cutting of Ti2AlNb is simulated and analyzed. The results demonstrate that the peridynamics method can accurately simulate the material deformation and damage evolution during machining of Ti2AlNb. The error between the predicted chip shear angle of 40.23° and the experimental result of 38.89° is 3.45%. The full width at half maximum of the damage spatial distribution is defined as the width of the primary shear zone, and the predicted value is 0.06 mm with an error of less than 7%.
刘浩,王兵,刘战强,李亮亮,蔡玉奎,宋清华. Ti2AlNb 切削切屑形成过程近场动力学仿真及试验研究[J]. 航空制造技术, 2023, 66(5): 68-75.
LIU Hao, WANG Bing, LIU Zhanqiang, LI Liangliang, CAI Yukui, SONG Qinghua. Peridynamics Simulation and Experimental Investigation of Chip Formation Process During Machining of Ti2AlNb[J]. Aeronautical Manufacturing Technology, 2023, 66(5): 68-75.