Abstract We investigate the emergence of rigid polycrystalline structures from atomistic particle systems. The atomic interaction is governed by a suitably normalized pair energy, where ‘sticky disk’ potential models atoms as hard spheres that interact when they are tangential. discrete energy frame invariant and no underlying reference lattice on configurations assumed. By means $$\Gamma $$ <m...

Airflows between centrally clamped, rotating, rigid disks are investigated with respect to the type of flow pattern, the parameters that influence nonuniform flow, and the effects of various flow patterns on disk stability. The experimental method uses a waterflow modeling technique for the airflow. The observed flow patterns are highly unsteady. The configuration and position of the shroud and...

Plastic anisotropy significantly affects the behavior of structures and machine parts. Given many parameters that classify a structure made anisotropic material, analytic semi-analytic solutions are very useful for parametric analysis preliminary design such structures. The present paper is devoted to describing plastic collapse thin orthotropic hollow disk inserted into rigid container. subjec...

Disk brakes or sawing processes represent complicated thermo-mechanical systems where the dynamic interaction of the different components involved including heat effects establish a physical problem very interesting for theory and practical applications. In both cases the main structural element is a rotating disk where heat and mechanical loads are induced via frictional or cutting force conta...

Abstract In this paper, we study the stabilization problem of a disk beam structure with disturbance. Specifically, consists clamped at one end to center rotating rigid disk, while other is attached tip mass subject non-uniform bounded We start investigation by designing controller via Active disturbance rejection control (ADRC) approach. The high gain extended state observer (ESO) first design...

Beam-beam deflection scan is a useful tool, both in the SLC and in future linear colliders, for extracting information about the beam position, .w size and luminosity. This technique poses nontrivial challenges to the instrumentation in its own right. The understanding of all aspects of beam-beam deflection, in particular that of disruption, is therefore crucial to a successful implementation o...