【摘要】 运用分子动力学模拟技术建立多刀具纳米切削铜模型,工件原子间相互作用力采用eam势计算,工件与刀具原子间相互作用力采用morse势计算,刀具原子间相互作用力采用tersoff势计算.通过分析切削过程中瞬间原子图像、切削力、能量、温度,发现多刀具纳米切削过程并不等同于单把刀具多次走刀,刀具之间相互干涉会影响切削力的变化.结果显示多刀具与单把刀具切削比较,切削力在一定程度内会变小,工件的温度相对较高,最终会影响切削效果.更多还原

【Abstract】 A multi- tool nanometric cutting model of single crystal copper is built by molecular dynamics simulation technique. The model include the utilization of the eam potential function to simulate the interatomic force between workpiece atoms,the Morse Potential function between the workpiece and tool atoms,the tersoff potential function between tool atoms. By analyses of nanometric cutting process,cutting forces,energy and temperature,it is observed that the multi- tool cutting process is very different from the single tool on many ways. Tools are affected by each other and then the cutting force is affected. The discussion implies that comparing with a single tool nanometric cutting,the cutting force becomes smaller,the temperature of workpiece becomes higher in the multi- tool nanometric cutting process,and then cutting performance is affected.更多还原