Fractal roughness effects on nanoscale grinding
Fractal roughness effects on nanoscale grinding
复制标题
DOI：
10.1016/j.apsusc.2018.10.144
复制
发表时间：
2019-02-15
影响因子：
6.7
通讯作者：
Salonitis, Konstantinos
中科院分区：
文献类型：
--
作者：
Papanikolaou, Michail;Salonitis, Konstantinos
三维分子动力学模拟已被用来研究分形粗糙度对纳米级研磨的影响。本研究的第一部分重点关注工件粗糙顶表面对磨削工艺特性的影响，特别强调摩擦系数、磨削力和表面下温度。第二部分重点讨论由于粗糙的磨料接触表面而导致的上述参数的变化。使用多元 Weierstrass-Mandelbrot 函数生成粗糙表面轮廓，同时将磨料建模为梯形。通过调整分形维数 D-s 的值可以控制不规则的表面形貌。对于不同的切削深度值重复了上述实验。我们的结果表明，磨削工艺参数主要取决于切割深度以及磨料下表面轮廓，这也定义了工件和磨料之间的界面接触面积，而不是工件顶表面的形貌。
Three-dimensional Molecular Dynamics simulations have been performed to investigate the effects of fractal roughness on nanoscale grinding. The first part of this investigation focuses on the effects of the workpiece rough top surface on the grinding process characteristics, with special emphasis placed on the friction coefficient, the grinding forces and the subsurface temperature. The second part focuses on the alternation of the aforementioned parameters due to the rough abrasive contact surface. Rough surface profiles have been generated using the multivariate Weierstrass-Mandelbrot function while the abrasive has been modelled as a trapezoid. The irregular surface topography has been controlled by tuning the value of the fractal dimension D-s. The aforementioned experiments have been repeated for various values of the cutting depth. Our results indicate that the grinding process parameters are mainly dependent on the cuffing depth as well as the abrasive lower surface profile, which also defines the interface contact area between the workpiece and the abrasive, rather than the topography of the workpiece top surface.