摘要
基于Voronoi建模原理开发了满足金属材料晶体学拓扑规律的多晶建模算法。在晶体尺寸满足对数正态分布时,采用多边形内角阈值来控制晶体饱满度。结合ABAQUS二次开发技术实现了钛合金多晶切削过程的参数化建模及有限元分析,并通过对比车削试验数据和仿真数据验证了模型的可靠性。仿真结果表明:在材料内部晶界的阻力作用下,较小的晶体平均尺寸和标准差分别容易产生较大的切削力和较低的切削温度。该建模方法能较好地模拟多晶金属材料的切削过程,可为切削机理的细观研究奠定技术基础。
Based on the theory of Voronoi modeling, a polycrystalline modeling algorithm that satisfies the topological law of metal crystallography is developed.While the crystal size satisfies the lognormal distribution, the polygonal internal angle threshold is used to control the crystal fullness.Combined with the secondary development technology of ABAQUS,the parametric modeling and finite element analysis of the titanium alloy polycrystalline cutting process are realized, and the reliability of the model is verified by comparing turning experiment data and simulation data.The simulation results show that smaller average crystal size and standard deviation are prone to produce larger cutting force and lower cutting temperature respectively under the resistance of the grain boundary inside the material.This modeling method can well simulate the cutting process of polycrystalline metal materials and lay the technical foundation for the mesoscopic research of the cutting mechanism.
作者
彭茂武
谷丽瑶
Peng Maowu;Gu Liyao(School of Mechanical Engingeering,Southwest Jiaotong University,Chengdu 610031,China)
出处
《工具技术》
北大核心
2021年第5期48-54,共7页
Tool Engineering
基金
中央高校基本科研业务费专项资金资助(2682020CX33)。
