基于热力耦合模型的金属切削过程有限元分析  

Finite element analysis of metal orthogonal cutting process based on coupled thermo-mechanical model

作　　者：吴金炎[1] 王庆明[1] 

机构地区：[1]华东理工大学机械与动力工程学院,上海200237

出　　处：《机械》2009年第2期18-21,共4页Machinery

摘　　要：基于有限元理论和热力耦合模型的研究,通过讨论切削过程中的关键技术,主要包括切削加工有限元方程的建立;构件材料的Johnson-Cook本构模型;切屑分离准则;材料断裂准则;接触摩擦模型;切削热的产生和分布;残余应力的分析和切削力的比较分析等,建立了二位金属切削过程模型,通过采用粘结-滑移摩擦模型,有效地模拟了航空钛合金的切削加工过程,对此类材料加工的切削力、切屑温度以及应力场和应变的分布进行了分析。Based on metal cutting theories and fully coupled temperature-displacement analysis, explicit, an orthogonal cutting model was established. The important technology of cutting modeling was summarized, including the establishment of finite element equations, flow stress models of work-piece materials, meth6ds to building up element grids, chip separation criteria, material fracture criteria, the contact friction model, the generation of heat and the distributions of the temperature, the distribution residual stresses, analysis of cutting force. It predicts the cutting morphology, cutting force, cutting temperature effective stress and strain distribution

关 键 词：有限元分析 热力耦合 金属切削 切削热 

分 类 号：O242.21[理学—计算数学]