文献类型：期刊文献

英文题名：Study of shear-plastic slip mechanism based on TC4 titanium alloy

作者：Hu, Bo Zou, Zichuan Tian, Pengfei Xiao, Nian Yuan, Sen Zhao, Xianfeng

第一作者：胡波

通信作者：Yuan, S[1];Zhao, XF[2]

机构：[1]Guizhou Inst Technol, Sch Mech Engn, Guiyang, Peoples R China;[2]Guizhou Normal Univ, Sch Mech & Elect Engn, Guiyang, Peoples R China;[3]Guizhou Univ, Sch Mech Engn, Guiyang, Peoples R China;[4]Guizhou Univ Tradit Chinese Med, Shizhen Coll, Guiyang, Peoples R China

第一机构：贵州理工学院机械工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Mech Engn, Guiyang, Peoples R China;corresponding author), Guizhou Univ, Sch Mech Engn, Guiyang, Peoples R China.|贵州理工学院机械工程学院;贵州理工学院;

年份：2026

卷号：21

期号：1

外文期刊名：PLOS ONE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001680396800033)】；

基金：The Guizhou Provincial Youth Science and Technology Talents Growth Project(Grant No.QJJ[2024]163); Higher Education Engineering Research Center of Guizhou Province (Grant No. QJJ[2023]040); Guizhou Association for Science and Technology New Quality Qianyan Leading Project - Youth Voyage Program 2025 (XZQYXM-01-10).

语种：英文

摘要：The stagnation point and dead metal zone in the cutting process directly or indirectly affect the chip formation and stress distribution, while the stress distribution in the machining process determines the plastic slip direction of the material. Aiming at the current insufficient research on the dead metal zone and stagnation point theory, this paper divides the cutting process into rounded edge contact stage and rounded edge-rake face contact, constructs a slip line field model with dead metal zone based on the stress distribution and pressure distribution of the two stages, calculates the slip line field through the Cauchy problem, and plots the slip line field through the secondary development port in SOLIDWORKS. The dead metal zone model is based on the stress distribution of the obtuse circular contact, and the stagnation point occurs at the critical condition of the elastic-plastic transition of the material, i.e., at the maximum shear stress of the process. The dead metal zone and stagnation point are examined based on simulation, and the slip line field model is verified experimentally. The results show that the dead metal zone model can be predicted more accurately when the tool rake angle is 15 degrees or less, and the greatest influence on the stagnation point is the tool rake angle and the radius of the rounded edge of the tooltip, and the slip line field model containing the dead metal zone can more accurately reflect the plastic slip of the real cutting process. It can be seen that the dead metal zone model, stagnation point model, and slip line field model illustrate the cutting mechanism of the elastic and plastic phases of the cutting process, which lays a research foundation for the subsequent study of tool wear, chip formation, and machining surface quality.