The movement pattern of ellipsoidal nanoparticles confined between copper surfaces was examined using a theoretical model and molecular dynamics simulation. Initially, we developed a theoretical model of movement patterns for hard ellipsoidal nanoparticles. Subsequently, the simulation indicated that there are critical values for increasing the axial ratio, driving velocity of the contact surface, and lowering normal loads (i.e., 0.83, 15 m/s, and 100 nN under the respective conditions), which in turn change the movement pattern of nanoparticles from sliding to rolling. Based on the comparison between the ratio of arm of force (e/h) and coefficient of friction (μ) the theoretical model was in good agreement with the simulations and accurately predicted the movement pattern of ellipsoidal nanoparticles. The sliding of the ellipsoidal nanoparticles led to severe surface damage. However, rolling separated the contact surfaces and thereby reduced friction and wear.

使用理论模型和分子动力学模拟研究了限制在铜表面之间的椭圆形纳米颗粒的运动模式。最初，我们开发了硬椭圆形纳米颗粒运动模式的理论模型。随后，仿真表明存在一些关键值，用于增加轴向比率，接触表面的驱动速度和降低法向载荷（即在相应条件下分别为0.83、15 m / s和100 nN），这些值依次发生变化纳米粒子从滑动到滚动的运动方式。基于力臂之比（e / h）与摩擦系数（μ）的理论模型与仿真结果吻合得很好，并且可以准确预测椭圆形纳米颗粒的运动模式。椭圆形纳米颗粒的滑动导致严重的表面损伤。但是，滚动使接触表面分离，从而减少了摩擦和磨损。