There are numerous engineering applications where Glass Fiber Reinforced Polymer (GFRP) composite tubes utilized, such as desalination plants, power transmission systems, and paper mill, well marine, industries. Some type of machining is required for those various either joining or fitting procedures. Machining GFRP has certain difficulties that may damage the tube itself because fiber delamina...

This work presents a systematic procedure for the detailed, mesoscopic Finite Element simulation of 3D filament wound fiber skeletons with thermoplastic impregnation. First, relevant structural constituents are identified and mechanically characterized by means specially adapted test methods specimens. In next step, mechanical behavior is simulated in separate FE models, so-called sub-models. i...

Autotransformers (ATs) have been widely used for many years. For large size ATs, a tertiary winding is usually included. Sometimes the tertiary winding is loaded for station service, local loads, VAR compensation, etc. Other times, the tertiary winding is buried and acts as stabilizing winding which provides a path for zero-sequence current and 3rd harmonic current. Three-winding ATs present so...

The paper presents manufacture of C/C-SiC composite materials by wet filament winding C fibers with a water-based phenolic resin subsequent curing via autoclave as well pyrolysis and liquid silicon infiltration (LSI). Almost dense different angles ranging from ±15° to ±75° could be obtained porosities lower than 3% densities in the range 2 g/cm3. Thermomechanical characterization tensile testin...

—A method is developed to use a single set of two-dimensional numerical optimizations of inductor winding shapes to simply calculate the optimal winding configuration for any design on the same core without repeating the computationally intensive numerical optimization. For transformer windings, the results are consistent with previous one-dimensional optimizations, but for inductor windings, a...

The delta primary transposed zigzag secondary (DTz) transformer has been designed and used to reduce the bad impacts of the harmonic in the distribution power system. The DTz transformer is constructed with delta connection in primary winding and the three transposed windings at the different core legs of secondary winding. The harmonic reduction method of the DTz transformer applies two basic ...

Introduction In order to mimic the behaviors of natural tissue, the optimal approach for designing novel biomaterials has to be inspired to nature guidelines. In bone engineering applications, an ideal scaffolds should be biodegradable in medium-long term, to preliminary maintain its structural behaviors needful for cellular in-growth and diffusion of nutrient, and timely release targeted bio-m...

Abstract: At present, because of their advantages of simple structure, low cost, low power consumption and high efficiency, single winding bearingless permanent magnet synchronous motors (SBPMSMs) have become one of the research hotspots in the bearingless technology field. However, a high motional-electromotive force (EMF) is generated by rotor rotation in the single winding, which already has...