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以单晶Cu纳米材料为研究对象,建立了纳米材料加工分子动力学模型,利用计算机仿真技术分析了加工表面形成机理、刃口钝圆半径和切削速度对系统温度的影响。结果表明,单晶Cu纳米材料工件在加工中出现塑性变形、弹性变形以及弹塑性混合变形;原子之间的键合力随着系统温度的升高而降低,单晶Cu纳米材料出现热软化效应;随着切削速度的增加,系统温度逐渐升高,但刃口钝圆半径对刀具温度分布影响不大。
Taking monocrystalline Cu nanomaterials as the research object, the molecular dynamics model of nanomaterials was established. The influence of the formation mechanism of the machined surface, the radius of the obtuse edge and the cutting speed on the system temperature was analyzed by computer simulation. The results show that the deformation of single crystal Cu nanomaterials during the process of plastic deformation, elastic deformation and elastoplastic mixing deformation; the bonding force between atoms decreases with increasing system temperature, single crystal Cu nanomaterials appear softening effect; With the increase of cutting speed, the temperature of the system gradually increases, but the radius of the edge blunt circle has little effect on the tool temperature distribution.