金属切削过程热力耦合三维数值仿真颜怡霞.pdfVIP

Journal of Mechanical Strength 20 11 ，33 (6 ):845 -849 金属切削过程热力耦合的三维数值仿真* 3D NUMERICAL SIMULATION OF METAL CUTTING PROCESSES USING A THERMOMECHANICAL COUPLED APPROACH ＊＊ 颜怡霞 陈裕泽 ( ， 62 1900 ) 中国工程物理研究院总体工程研究所 绵阳 YA N Y iXia CHEN Y uZe (Institute of Systems Eng ineering ，China Academy of Eng ineering Physics ，M ianyang 62 1900 ，China ) ， ， 摘要 以金属块体为研究对象 利用动态显式积分有限元程序对金属的切削过程进行三维热力耦合分析 讨论切削 ， 、 、 ， 、 过程数值模拟关键技术 展现切屑的形成 工件与刀具的接触 分离和摩擦 给出切削过程中工件和切屑中的温度 应力 ， 。 和应变分布的变化情况 分析切削速度对不同形貌的切屑形成的影响 文中的计算方法可为更复杂的切削过程的数值 模拟提供技术支撑。 关键词 金属切削 三维 热力耦合 数值模拟 中图分类号 O242 TH123 Abstract The cutting processes of a metal block were numerically simulated by the dynamic explicit finite element code ABAQUS． Taking thermo-mechanical coupling effect into consideration ，the simulation presented the variation of temperature ， stress and strain distribution in the workpiece and chip ． The effective plastic strain failure criterion was applied to modeling the chip separation and plastic formation ． The phenomenon of the contact and friction between the workpiece and the cutting tool were described ． And the effect of the cutting velocity on the chip formation was analyzed ． This work will help as a reference to tackle more complex cutting processes． Key words Metal cutting ;3 D ;Thermo-mechanical coupling ;Numerical simulation Corresp onding author :CHE