Abstract

Stick of the deep-sea sediment on the surface of the mining machine can deteriorate its working efficiency. To resolve this issue, this study aims to reduce the adhesion force along the soil-metal interface by adjusting the roughness of the metal surface. During the experimental study, six types of Titanium samples with different surface roughness were first prepared through surface polishing. Then the adhesion force between the marine clay agglomerate and the Titanium surface was measured with Atomic Force Microscopy (AFM). The measured results indicated the adhesion force would first decrease and then increase with the surface roughness. The contact analysis based on Finite Element Analysis was then conducted to investigate the related mechanism. The simulation results indicated changed contact area with the surface roughness can partially explain the existence of the critical roughness with minimum adhesion force. This study can provide a substitutional protocol to reduce the adhesion force between the metal surface of the engineering machine and the surrounding adhesive clay.

摘要

深海沉积物粘在矿机表面会降低其工作效率。为了解决这个问题，本研究旨在通过调整金属表面的粗糙度来降低沿土壤-金属界面的粘附力。在实验研究中，首先通过表面抛光制备了六种不同表面粗糙度的钛样品。然后用原子力显微镜（AFM）测量海洋粘土团聚体和钛表面之间的粘附力。测量结果表明附着力随着表面粗糙度的增加先减小后增大。然后进行基于有限元分析的接触分析以研究相关机制。模拟结果表明，随着表面粗糙度的变化，接触面积的变化可以部分解释具有最小附着力的临界粗糙度的存在。该研究可为降低工程机械金属表面与周围粘性粘土之间的粘附力提供替代方案。