摘要
利用AdvantEdge切削仿真软件建立二维直角切削过程的数值仿真模型,通过改变工件材料本构模型中的初始应力、应变硬化系数、应变率强化系数和热软化系数,获取各模型参数对二维直角切削仿真结果的影响.结果表明:对切削力、刀尖温度和应力影响最大的是热软化系数,对切屑形貌影响最大的是初始应力;材料本构模型主导切削仿真过程中的应力-温度场耦合过程,同时,本构模型参数对仿真结果的影响具有明显的非线性效应.
2Dorthogonal cutting simulation model has been built by commercial FEM code AdvantEdge.The influence of the governing parameters on the simulation results of 2Dorthogonal cutting has been achieved by modifying the governing parameters of material constitutive mode,which includes the governing parameters of initial stress,strain hardening,strain rate hardening and thermal softening.It is found that the effect of governing parameter of thermal softening on cutting forces,cutting temperature and tool stress is maximal,comparing the other governing parameters.The effect of governing parameter of initial stress on chip morphology is maximal,comparing the other governing parameters.Material constitutive model dominates the thermal-mechanical coupling process in cutting simulation.The effects of constitutive model parameters on the simulated results show obvious nonlinear characteristics.
出处
《华侨大学学报（自然科学版）》
CAS
北大核心
2016年第5期541-546,共6页
Journal of Huaqiao University(Natural Science)
基金
国家自然科学基金面上资助项目(51105224
51475173)
福建省高校产学研合作科技重大项目(2014H6018)
华侨大学中青年教师科研提升计划项目(13J0521)
华侨大学研究生科研创新能力培育计划资助项目(1511403008)
关键词
切削加工
数值仿真
有限元模型
热-力耦合
本构模型
cutting process
numerical simulation
finite element model
thermal-mechanical coupling
constitutive model
