PGI-1, FZ Jülich, Jülich, Germany.
J Chem Phys. 2018 Apr 14;148(14):144701. doi: 10.1063/1.5024038.
I develop a general mean-field theory for the influence of electrostatic attraction between two solids on the contact mechanics. I assume elastic solids with random surface roughness. I consider two cases, namely, with and without an electrically insulating layer between the conducting solids. The former case is important for, e.g., the finger-touch screen interaction. I study how the electrostatic attraction influences the adhesion and friction. For the case of an insulating layer, I find that when the applied nominal contact pressure is relatively small, as the applied voltage increases, there is a sharp increase in the contact area, and hence in the friction, at a critical voltage.
我发展了一种普遍的平均场理论，用于研究两个固体之间的静电吸引对接触力学的影响。我假设具有随机表面粗糙度的弹性固体。我考虑了两种情况，即导电固体之间有和没有电绝缘层。前一种情况对于例如手指触摸屏幕的相互作用很重要。我研究了静电吸引如何影响附着力和摩擦力。对于绝缘层的情况，我发现当施加的名义接触压力相对较小时，随着施加电压的增加，在临界电压处，接触面积急剧增加，从而摩擦力也急剧增加。
