论文部分内容阅读
在高速切削过程数值模拟中,材料本构模型影响着数值计算精度。基于有限元软件Abaqus平台,引入基于位错动力学的BCJ本构模型,实现铝合金高速切削过程更为精确计算。研究了BCJ本构模型嵌入Abaqus的关键技术及其高速切削过程有限元模型建立方法,完成了铝合金6061-T6直角高速切削过程模拟,对比分析了基于BCJ本构模型和JC本构模型的差异。结果表明,数值计算结果与文献数据具有良好的一致性,BCJ模型能够更全面准确地描述高速切削过程中材料的动态性能,进而说明文中基于BCJ本构模型的高速切削数值计算是可靠的。
In the numerical simulation of high-speed cutting process, the material constitutive model affects the numerical accuracy. Based on the Abaqus finite element software platform, BCJ constitutive model based on dislocation dynamics is introduced to realize more accurate calculation of high speed cutting process of aluminum alloy. The key technologies of BCJ constitutive model embedded in Abaqus and the establishment of finite element model of high speed cutting process are studied. The simulation of 6061-T6 right angle high speed cutting process is completed. The differences between BCJ constitutive model and JC constitutive model are analyzed. . The results show that the numerical results are in good agreement with the literature data. The BCJ model can describe the dynamic behavior of the material during the high-speed cutting more completely and accurately. The numerical calculation of high-speed cutting based on the BCJ constitutive model is reliable.