Shear behavior of an amorphous film with bubble soap raft model

作者：Denis Mazuyer, J. M. Georges, Bernard Cambou · 发表于：Journal de physique · 年份：1989 · DOI：10.1051/jphys:019890050090105700 · 被引用次数：12 · 研究领域：Adhesion, Friction, and Surface Interactions、Granular flow and fluidized beds、Surface Modification and Superhydrophobicity

Wear and friction in the boundary regime are often governed by the mechanical behavior of very thin layers separating the two solids in sliding contact. Sometimes, these layers are amorphous. Thanks to a bubble soap raft model, we simulate the sliding of two homogeneous rectangular crystalline rafts separated by an amorphous layer. The thickness and the length of this layer are variable. The kinematic field of the plastic flow with large displacements is experimentally determined at the same time as the tangential stress is recorded. Experimental results show that the sliding stress depends on the thickness-length ratio of the amorphous layer. When the ratio is high, solid mechanical theories explain the behavior, but when it is low, the effect of microscopic instabilities in the amorphous layer is dominant.