摘要
基于大变形理论和虚功原理,建立了斜角切削加工过程的三维热-弹塑性有限元模型。分析和研究了涉及切削加工有限元模拟的关键技术。采用通用有限元求解器ABAQUS/Explicit对斜角切削过程进行了有限元模拟,分析了切削过程中切屑的形成过程及其形貌、三维切削力的变化情况,以及应力、应变、切削温度和已加工表面残余应力的分布规律。通过与试验数据的比较,证明了所建立有限元模型的正确性。斜角切削过程的三维热—弹塑性有限元模拟研究为铝合金高速切削加工的工艺参数优化、刀具几何参数的合理选择提供了参考。
Based on large deformation theory and virtual work principles, a three-dimensional （3-D） thermo-elasticplastic coupled Finite Element Analysis （FEA） model was constructed. Several key FEA techniques were analyzed and implemented to improve the accuracy and efficiency of the FEA simulation. An oblique cutting case was simulated using the 3-D FEA model. The simulation results were presented and analyzed, including the chip＇s geometric shape and its evolution processes, the stress, strain, cutting forces, and temperature distributions in the workpiece, tool and chip, as well as the residual stresses distributions on the machined surface. The 3-D thermo-elastic-plastic FEA model was proved to be effective by comparing some results of the simulation cases. This FEA model could be used to optimize the processing parameters and rational selection of the geometric parameters of cutting tools.
出处
《计算机集成制造系统》
EI
CSCD
北大核心
2009年第5期1010-1015,共6页
Computer Integrated Manufacturing Systems
基金
国家863计划资助项目(2006AA04Z147)
国家自然科学基金资助项目(50435020)~~
关键词
斜角切削
有限元分析
热—弹塑性
刀具
oblique cutting
finite element analysis
thermo-elastic-plastic
cutting tools
作者简介
白万金（1977-），男，湖北宜都人，浙江大学机械与能源工程学院博士研究生，主要从事先进制造技术的研究。E—mail；baiwking@163．com。
