Effective Shear Displacement on Lateral Adhesion Force of a Liquid Bridge Between Separated Plates
Effective Shear Displacement on Lateral Adhesion Force of a Liquid Bridge Between Separated Plates
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DOI：
10.1007/s11249-016-0744-1
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发表时间：
2016-08
影响因子：
3.2
通讯作者：
Kentaro Tanaka;K. Iwamoto
中科院分区：
文献类型：
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作者：
Kentaro Tanaka;K. Iwamoto
粘附力是微米和纳米力学中影响最大的因素之一。两个物体之间的液桥会产生粘附力，该粘附力通常充当附加法向载荷。然而，粘附力也作用于横向。我们测量了平行板之间剪切液桥的横向粘附力。此外，通过使用图像处理技术来跟踪接触线的移动，这使我们能够引入有效的剪切位移。横向附着力与有效剪切位移呈线性关系。它表明实验结果与简单矩形液桥界面能变化的分析方法之间具有良好的一致性。我们进一步发现，即使在剪切过程一开始的情况下，也没有处于固定状态的接触线。然而，在这方面，粗糙表面上的接触线的移动很不方便。因此，两个较粗糙表面之间的液桥具有较高的有效剪切位移，并导致较高的横向粘附力。
Adhesion force is among the most influencing factors in micro- and nano-mechanics. A liquid bridge between two bodies gives rise to the adhesion force, which usually acts as additional normal load. However, the adhesion force acts also in lateral. We measured the lateral adhesion force of a sheared liquid bridge between parallel plates. In addition, movement of contact lines is tracked by using an image processing technique, which allowed us to introduce an effective shear displacement. The lateral adhesion force has a linear relation with the effective shear displacement. It shows good agreement between experimental result and the analytical approach regarding changes of interfacial energy with simple rectangular shape of the liquid bridge. We further revealed that there is no contact line in pinned state even in the case with the very beginning of the sheared process. In this regard, however, the contact line on rougher surface is awkward in its movement. Therefore, the liquid bridge between two rougher surfaces has higher effective shear displacement, and it results in the higher lateral adhesion force.