Papers by Keyword: Accumulating

Abstract: This paper conducted a parametric analysis of the flexible pavement layers’ accumulating deflections. The accumulating process of the full-scale medium-strength subgrade (MFC) pavement layer deflections had been simulated by the previous radial basic function (RBF) model. Based on the RBF simulation results, several parameters were proposed to investigate the accumulating features of the pavement layer thickness response, the relationship between layer deflection capacity and average layer thickness, the relationship between the average thickness values of two layers and the relationship between the maximum deflection values of two layers. The analytical results revealed some unseen features of the pavement layer deflections, which provided a new way to parametrically investigate the accumulating response of the flexible pavement layers.

Abstract: Recently, permanent magnet motors are widely used in wide industrial fields because they are suitable for compact mechanical system. The motor core is usually manufactured from magnetic steel sheet with press machine. However, usually most parts of the plate are scalped, and only small percent of the sheet is used for the core. The spiral accumulating core system is suitable for manufacturing the core more ecologically because in this system more than 50% of the magnet steel sheet can be used. In this study, therefore, the effective Young’s modulus of the spiral accumulating core is considered in order to find out a good method to fix the core. In this analysis, effective Young’s modulus of spiral accumulating core used for permanent magnet motor is considered by the application of the finite element method to 3D models, whose layers and slits are periodically arranged. Then, effects of slits, layers and embossing interlockings on effective Young’s modulus are analyzed. Finally, a convenient method of calculation based on rule of mixture is newly proposed for estimating the effective Young’s modulus of the real spiral accumulating core.

Abstract: Recently, permanent magnet motors are widely used in many industrial fields because they are suitable for compact mechanical system. The motor core is usually manufactured from magnetic steel sheet with press machine. However, usually most parts of the plate are scraped, and only small percent of the sheet is used for the core. The spiral accumulating core system is suitable for manufacturing the core more ecologically because in this system more than 50% of the magnet steel sheet can be used. In this study, therefore, the effective Young’s modulus of the spiral accumulating core is considered in order to find out a good method to fix the core. In this analysis, the finite element method is applied to 3D models, whose layers and slits are periodically arranged. Stress and thickness distributions are also analyzed in the bending process. When the spiral core is manufactured through spiral accumulating system with plate-bending process, the thickness change should be minimized because that may deteriorate dimensional accuracy of the spiral core. Also residual bending stress is investigated because that may cause an electric loss. The results indicate that plastic zone is limited at localized regions and therefore an electric loss is not very large. The effective Young’s modulus of the 3D dimensions model of the real spiral accumulating core is estimated about 127.5 GPa.