Совершенствование института саморегулирования и деятельности саморегулируемых организаций

The article highlights purposes, tasks, functions and challenges associated with the implementation of self-regulation, Russian and overseas practices of operation of self-regulated organizations in the sphere of receivership and in other economic sectors, as well as initial results of the realization of a concept of improving the self-regulation mechanisms. The article describes the rationale for directions and methods of improving the self-regulation instituteВ статье рассматриваются цели, задачи, функции и проблемы реализации саморегулирования, российская и зарубежная практика деятельности саморегулируемых организаций в сфере арбитражного управления и других отраслях экономики, первые результаты реализации концепция совершенствования механизмов саморегулирования.Обоснованы направления и меры совершенствования института саморегулирования

An assessment of impact strength of the mandible

In this study, an animal biomechanical study was performed to investigate the absorbed energy and impact strength of the mandible in relation to specimen position. Four regions of mandibles were loaded as complete pieces and gripped by the jaw of an Izod impact tester. All tests were carried out wet using the Izod impact test under two different impact loading directions, lateral and ventral.Absorbed energy and impact strength in kilojoules per square meter of specimen area were determined for each specimen. Under lateral impact loading, the absorbed energy was lowest for the anterior section due to the mental foramen's notch effect. The premolar region demonstrated more absorbed energy per unit area, OF impact Strength. than any other region. However, due to its small cross-sectional area, the premolar region also absorbs less impact energy.Under ventral impact loading conditions, anterior region absorbed twice as much impact energy than under lateral loading conditions. Premolar region absorbed the same impact energy under both lateral and ventral loading. Interestingly, mandibular angle under ventral loading absorbed five times more impact energy than under lateral loading. This behaviour is considered to be a mechanical adaptation to the actual loading of the mandible in vivo. (C) 2008 Elsevier Ltd. All rights reserved

dissimilar copper/brass joints

In this study, an experimental investigation has been carried out on microstructure and mechanical properties of friction stir welded copper/brass dissimilar joints. Effect of axial tool force to welding quality has been investigated under obtained optimal tool rotation rate and tool traverse speed conditions. The tool for the dissimilar copper/brass friction stir welding manufactured from X155CrMo-V12-1 cold work tool steel with material number of 1.2379. The friction stir welding quality was investigated by welding surface inspections, microstructural studies, micro hardness measurements and tensile tests. The experimental studies have shown that constant axial tool force during pre-heating and during welding process are very important. As a result, by using 2.5-3 kN of axial tool force during pre-heating and 5.5 kN of axial tool force during welding process, copper/brass dissimilar joints with well appearance and higher mechanical strength can be obtained

Elasto-plastic stress analysis of surface roughness effect on press fits

Many engineering fields, including tribology, seek to use or alter the behaviour of the system at the surface or at the interface between surfaces. Thus, the topography of the surface is of great interest and must be included in finite element analysis. Until nowadays, surface roughness effects were ignored in the analysis, due to the difficulty to generate a rough surface model and also to simplify the model in order to reduce calculation time. However, in many engineering application, such as press fit, the behaviour of the surface or the interface between surfaces are important. Thus, with the advance of numerical capabilities, the topography of the surface should be included in finite element simulations. This work presents a stress analysis for press fitted shaft-hub connections with different surface roughness in commercial finite element software

Investigation of 3D printed Savonius rotor performance

In this study increasing the performance of Conventional Savonius wind rotor has been investigated by a 3D (three dimensional) printer which is one of the rapid prototyping techniques. For this purpose, some design changes have been introduced to increase the performance of conventional Savonius wind rotor. Here, 3D digital designing of Savonius wind rotors have been easily manufactured tangible as a physical model by a 3D printer. Experimental data concerning produced Savonius wind rotors have been acquired by using a wind tunnel. Some numerical data have been obtained from the CFD (Computational Fluid Dynamics) analysis carried out under the same conditions. The effects of the additional blade end design have been examined to obtain more torque increase on improved classical Savonius wind rotor. Furthermore, by means of introducing straight blade, the effects of the flow compression inside the blade have been reduced and rotor performance increased. Based on such optimizations, optimum additional design parameters have been designated as that (1/r) ratio is 0.3, (s/r) is 1, and (α) additional straight blade angle is 135°. It has been determined that power coefficient is increased at a ratio of around 20% together with all these design changes. © 2016 Elsevier Lt

printed and adhesively bonded single lap joints

Three-dimensional printing is the common name given to various techniques used to manufacture different objects. Fused deposition technique is a commonly used additive manufacturing technology in prototyping and production. Fused deposition modelling systems are limited in terms of shape and size of parts. Printing parts with less support material, for parts too large to print in a single operation or for parts with fine details, sectioning and adhesively bonding is the solution for manufacturing. According to adhesion theory, the strength of adhesively bonding between three-dimensional printed parts is affected by surface roughness. Effects of layer thickness and print orientation on adhesion strength of parts manufactured with three-dimensional printing were experimentally studied. As a result of the study, it was found that the edgewise orientation had the highest bonding strength in lower layer thicknesses, while flatwise orientation had the highest bonding strength in higher layer thicknesses