the forging model for cold rolling is one of rolling models that is used in rolling calculations. in this model,the final rolling pressure is an average value and it is not an accurate model.also by using this model,the firction hill curves are plotted due to the central point of the rolling bite length while frictional stresses intersect at the neutral point.in this study, a new model based on...

Abstract In this paper the generalized model of contact two plan bodies that roll and slide or just is presented. The analytical solution correct distribution pressure in realized presence normal compressive force, which realizes contact, as well force pair a tangential force. This can be used on sprocket teeth due to sliding rolling itself gear pole. results obtained have been experimentally c...

A new model for the asymmetrical rolling is proposed to calculate minimum rollable thickness simply and fast by slab method. The calculation formulas of pressure, force, critical roll speed ratio, front tension under different deformation zone configurations are proposed, configuration-rolling parameter relationship diagram given analyzed. results show that can be reached when parameters keep c...

The interaction of circulating platelets with the vessel wall involves a process of cell catch and release, regulating cell rolling, skipping, or firm adhesion and leading to thrombus formation in flowing blood. In this regard, the interaction of platelet glycoprotein Ibalpha (GPIbalpha) with its adhesive ligand, vWF, is activated by shear force and critical for platelet adhesion to the vessel ...

We reported a simple and effective way of fabricating one-dimensional (1D) graphene oxide nanoscrolls (GONS) from graphene oxide (GO) sheets through shock cooling by liquid nitrogen. The corresponding mechanism of rolling was proposed. One possibility is the formation of ice crystals during the shock cooling process in liquid nitrogen to be the driving force. The other might be due to the uneve...

In this paper we present recent work on the design, fabrication by silicon micromachining, and packaging of a new gyroscope for stabilizing the autopilot of rotating aircraft. It operates based on oscillation of the silicon pendulum between two torsion girders for detecting the Coriolis force. The oscillation of the pendulum is initiated by the rolling and deflecting motion of the rotating carr...

The repeatability of rail wheel damage measurements is considered in this study. authors investigated the measurement vertical force dependence on wheel-rolling surface nature and suggested ways to reach higher repeatability. To investigate impact repeatability, results measuring forces with different systems were compared first. Another critical issue was estimating deviation field for measure...

S. A. Aksenov, E. N. Chumachenko, I. V. Logashina, Higher School of Economics, Department of Mechanics and Mathematical Simulation, Moscow, Russia T. Kubina, VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Ostrava, Czech Republic The application of finite element simulation to the problem of roll pass design for round bar rolling is considered. Two roll p...