The research aims to investigate the interlaminar fracture toughness of glass fiber/epoxy composites, which consist silica nanoparticles and rubber particles. Two kinds particles, one is reactive liquid (CTBN) other core-shell (CSR), were employed modify epoxy resin. In general, disadvantage adding particles into polymeric resin dramatic reduction stiffness although could be modified accordingly. order enhance fiber composites without sacrificing their stiffness, in conjunction with...

Environmentally friendly DC gas insulated transmission line (GIL) is currently one of the hot topics in advanced electric power equipment. Recently, fluoronitriles have been widely studied and considered to replace SF6 GILs. In this paper, breakdown voltage, insulator flashover partial discharge inception voltage fluoronitriles/CO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> mixtures are reported a field. The mole ratio mixed gases 4...

The application of environmentally friendly gases to insulated transmission pipelines could potentially improve the flexibility line corridors and reduce environmental impact such lines. Recently, C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> F xmlns:xlink="http://www.w3.org/1999/xlink">7</sub> CN has been considered as a potential replacement for SF xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> . present work assesses...

Charge accumulation on the surface of epoxy resin affects insulation performance under DC voltage. In order to illustrate effect coating characteristics charge in resin, micron and nano SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /epoxy composite coatings were deposited by spraying, was studied electrostatic probe method. The trap parameters analyzed method isothermal potential decay combining with carrier mobility cross-section...

Interference-fit is getting increasing attentions in the aerospace field owing to its excellent enhancement on sealing and fatigue life of composites assembly, but severe damage around hole caused by installation still a huge challenge. In this paper, three-dimensional anisotropic non-linear progressive model based continuum mechanics was developed reveal mechanism carbon fiber reinforced plastic (CFRP) interference bolting with sleeve. The proposed adopted strain-based failure criteria...

As a modification method, surface coating is considered to be an effective method in regulating the state of epoxy resin, thus suppressing accumulation charge. In this paper, resin coated with nano-TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /EP composite was prepared and two electrode systems which were respectively dominated by normal tangential electric field component designed. Surface potential distributions samples at...

This paper introduces an HVDC SF6/N2 gas-insulated transmission line (GIL) prototype that operates under 100-kV DC application. In the first part, development history of GIL products over past 50 years is reviewed. After that, design concept ±100-kV introduced. A was prepared and withstanding voltage test superimposed lightning impulse were performed. The results show this passed all required tests, including hydrostatic test, gas tightness thermal cycling etc. successful preparation product...

A dynamic model is the basis of controller design. However, existing floating wind turbine models often have complex structures and pay more attention to fine description detailed characteristics. They are suitable for performance test rather than control system In this brief, a control-oriented nonlinear physical-based (CNO-NP) offshore semisubmersible (OSWT) consisting turbine, platform, mooring built first based on mechanism analysis. Then, linear parameter varying (CNO-LPV) derived, its...

The single-lap interference-fit bolted joint is widely used in composite structures. In order to get an accurate prediction of bearing strength, secondary bending and bolt load effects are studied the present research via combination experimental numerical methods. specimens with four levels size ( I) torque T) were tested according ASTM standard D5961 evaluate behavior stiffness. Meanwhile, a finite element model considering shear nonlinearity built simulate strength evolution intralaminar...

The spacecraft often interacts with plasma, high energy particles and magnetic fields on orbit. It causes the charge injected in insulation materials forms a electric field. discharge phenomenon will happen when internal field reaches voltage threshold. material is key component of electrical equipment spacecraft, its properties affects reliability lifetime whole spacecraft. withstands fast thermal cycle during operation orbit, which stress it. accumulation changes molecular structure...

The research is aimed to investigate the influence of spherical nanoparticles on fracture behavior glass fiber/epoxy composites. Two different contents silica nanoparticles, 10wt% and 20wt %, were introduced into composite samples. Through a sol-gel technique, particles with diameter 25 nm dispersed uniformly epoxy matrix. Subsequently, mixtures impregnated unidirectional fiber mat by means vacuum hand lay-up process form laminate. During fabrication, porous film was inserted mid-plane...

To replace SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> in electric power system, C xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> F xmlns:xlink="http://www.w3.org/1999/xlink">7</sub> CNCO xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> gas mixture was put forward and thought as the most promising substitute. However, there is a lack of swarm parameters CN-CO mixture. In this study, effective ionization coefficients at...