Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53348#.VL71KyzQrzE Author(s)    Rostislav I. Nepershin Affiliation(s) Plastic Deformation Systems Department, Moscow State University of Technology “STANKIN”, Moscow, Russia . ABSTRACT Steady state plastic flow of the ideal plastic half-space surface by sliding elliptical cylinder is numerically calculated with account of contact friction effect. Numerical solution of the plane strain hyperbolic differential equations with unknown contact pressure distribution is treated as nonlinear vector equation for the steady state plastic flow condition. Pronounced effect of the ellipse boundary curvature on the plastic flow mode is shown. Engineering application of the computer model is surface plastic deformation technology to improve wear and fatigue resistance of metal parts. KEYWORDS Surface Layer , Plastic Flow , Ideal Plasticity , Sliding , Elliptical Cylinder...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50743#.VEm921fHRK0 Author(s) Sergei Soldatenko 1 , Lev Karlin 2 Affiliation(s) 1 A.M. Obukhov Institute of the Atmospheric Physics of the Russian Academy of Sciences, Moscow, Russia . 2 Russian State Hydrometeorological University, St. Petersburg, Russia . ABSTRACT Exploration of the climate change impact on wind energy is a focus of scientific analysis and research in many countries around the world. Previous studies have demonstrated that over the last three decades measured wind in the boundary and surface layer of the atmosphere has changed all over the globe. However, effects of climate change on the wind energy sector of Ru...