Adhesive contact model between an elasticcylinder and an elastic half space is studied in the presentpaper,in which an external pulling force is acted on the abovecylinder with an arbitrary direction and the contact width isassumed to be asymmetric with respect to the structure.Solu-tions to the asymmetric model are obtained and the effect ofthe asymmetric contact width on the whole pulling processis mainly discussed.It is found that the smaller the abso-lute value of Dundurs' parameter β or the larger the pullingangle θ,the more reasonable the symmetric model would beto approximate the asymmetric one.
Cong Yan Shaohua Chen LNM, Institute of Mechanics, Chinese Academy of Sciences,100190 Beijing. China
包含联合多重空间和时间规模的问题为粒子或连续统力学的常规框架提供真实挑战。在这篇论文，四案例研究(砍乐队形成大批金属性的眼镜，分裂源于压力波浪，在一个探查尖端和样品之间的相互作用，有分子的统计热力学的 nanoindentation 的模拟)被提供说明trans规模问题的三个层次(问题由于各种各样的物理机制在宏级，问题由于在 macro/micro-level 的微结构进化，问题由于在 micro/nano-level 联合原子/分子和有限尺寸身体)并且他们的明确的表达。因此，非平衡统计力学，联合 trans 规模方程和同时的答案，和基于原子 / 分子的相互作用的 trans 规模算法作为 trans 规模力学的三个可能的模式被建议。
Effects of deposition layer position and number/density on local bending of a thin film are systematically investigated. Because the deposition layer interacts with the thin film at the interface and there is an offset between the thin film neutral surface and the interface, the deposition layer generates not only axial stress but also bending moment. The bending moment induces an instant out-of-plane deflection of the thin film, which may or may not cause the socalled local bending. The deposition layer is modeled as a local stressor, whose location and density are demonstrated to be vital to the occurrence of local bending. The thin film rests on a viscous layer, which is governed by the Navier-Stokes equation and behaves like an elastic foundation to exert transverse forces on the thin film. The unknown feature of the axial constraint force makes the governing equation highly nonlinear even for the small deflection case. The constraint force and film transverse deflection are solved iteratively through the governing equation and the displacement constraint equation of immovable edges. This research shows that in some special cases, the deposition density increase does not necessarily reduce the local bending. By comparing the thin film deflections of different deposition numbers and positions, we also present the guideline of strengthening or suppressing the local bending.
