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A mechanical model for the adhesive contact with local sliding induced by a tangential force

Acta Mechanica Solida Sinica 2017年第4期30卷 369-373页

作者： Gan-Yun Huang Ji-Feng Yan Department of Mechanics School of Mechanical EngineeringTianjin University

Adhesion has been demonstrated to play an important role in contact and friction between objects at small scales. While various models have been established for adhesive contact under normal forces, studies on the adhesive contact under tangential force have been far fewer, which if any, are mostly confined to the non-slipping situations. In the present work, a model has been proposed for adhesive contact with local sliding under tangential forces. Herein, the onset of local sliding in adhesive contact has been addressed by assuming the nucleation of dislocations. By analogy with the emission of dislocations at a crack tip, the critical tangential force for the onset of sliding has been determined, and its effect on the evolution of contact size has also been studied. Comparison with relevant experiments has verified the validity of the present model.

关键词： Adhesive contact Tangential force local sliding Dislocation Contact size

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Monitoring the Deformation of Cableways

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Geo-Spatial Information Science 2002年第1期5卷 18-21页

作者： Dante Salvini Swiss Federal Institute of Technology ETH Honggerberg

One type of aerial cableway consists of a continuous cable,which works at the same time as carrying cable and drawing *** kind of cableway is supported by many towers,which divide the total length in linear *** small deviations from the planed layout can increase the strain of the cable and the danger of *** deviations of the position of the towers from the planed layout are due to local sliding or sinking of the foundation or other mechanical *** to now the axis of the cableways were periodically measured by traditional *** goal of this project is to demonstrate the possibility of measuring the axis of a cableway with GPS techniques,while the cable is *** results show that the proposed measuring device provides precise results in a simple and reliable way.

关键词： satellite_geodesy conventional geodesy GPS survey adjustment aerial cableway local sliding dynamic monitoring kinematic on the fly

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