In the present study, a finite element impact model of plain-woven fabric was developed and analyzed using commercial FEM code ANSYS ® then validated via drop-weight experiment. Then numerical analysis carried out to investigate low-velocity performance hybrid carbon/Twaron fabric. During analysis, several factors were considered, such as different ratios plain fabric, with weaves, case multi-layer panel. The results show that among types scenario ratio 1:1, where carbon yarns are only in...

Abstract Passive cooling materials represent an effective and environmentally friendly strategy for achieving energy efficiency. The passive performance can be achieved by shielding partial solar irradiance transmitting infrared radiation emitted the human body or surroundings. One solution is to utilize Mie scattering theory of nanoparticles (NPs) dispersed in polymers adjust spectral transmissivity. However, often limited agglomeration NPs polymer matrix. In this study, spherical titanium...

Nanostructures based on flexible material are essential for modulating reflected colors by actively changing the unit structure. However, current nanostructures face challenges in achieving active and efficient modulation across a broader spectral range. Here, we propose stretchable color management method. The structure consists of polydimethylsiloxane (PDMS) substrate cross-shaped lithium niobate (LiNbO3). This study achieves reflection changes, continuous adjustment, automatic switching...

To solve the problem in which vibration signal of transformer is affected by noise and electromagnetic interference, leads to low accuracy fault diagnosis pattern recognition. A CEEMDAN-MRAL method based on Fiber Bragg grating (FBG) proposed evaluate state quickly accurately. The FBG sends wavelength change optical center caused demodulation system, obtains effectively avoids influence strong interference inside transformer. decomposed into several intrinsic mode functions (IMFs) complete...

In order to solve the problem that vibration signal of transformer is affected by noise and electromagnetic interference, resulting in low accuracy fault diagnosis mode recognition, a CEEMDAN-MRAL method based on Fiber Bragg Grating (FBG) was proposed quickly accurately evaluate state transformer.The FBG sends wavelength change optical center caused demodulation system, which obtains effectively avoids influence strong interference inside transformer. The decomposed into several intrinsic...

Outdoor structures, such as vehicles, buildings, and outdoor equipment, are prone to overheat due prolonged exposure solar irradiation, which could affect their service life or user experience. To address this urgent issue, we developed a climate-adaptive thermal management solution using zinc oxide (ZnO)/low-density polyethylene (LDPE) hybrid membranes. The cooling performance of the membrane was examined across different seasons, achieving maximum temperature reductions (∆T) 12.55 °C in...

A novel composite was constructed by the in situ growth of silver nanowires (AgNW) on multi-walled carbon nanotubes (MWCNT). Firstly, thiol groups were covalently bonded onto surface MWCNT esterification thioglycolic acid with hydroxylated MWCNT. Reduced platinum (Pt) nanoparticles then attached to via groups. In presence poly(vinyl pyrrolidone), Pt served as seeds for generating AgNW uniform diameter. Finally, a MWCNT/AgNW conductive network structure fabricated. The and morphology measured...

In the present research, a physical-geometric-feature of continuous yarn in plain woven fabric was created and its FE model analysed by considering two key issues fabric, crimp inter-yarn friction. The basic parameters Young’s modulus single friction coefficient were investigated for practical fabrics tensile pull-out tests. analysis indicated that stress-strain curves effective evaluating equivalent comparing with experiment on Twaron CT® Plain Woven Fabric. addition, simplified three...

Many researchers have reported that inter-yarn friction has an important effect on the response of plain-weave fabric to impact. However, effects impact responses woven fabrics with other weaves not been studied in detail. In present work, numerical analysis was utilized study different (the plain weave, 2/2 twill, basket, and 3/1 twill) a low-velocity Both greatly influenced The higher friction, levels tensile stresses concentrated near centers fabrics, earlier failures fabrics. addition,...

Abstract This work proposes an approach to fabricate flexible transparent ultraviolet (UV)-shielding membrane by casting method, which uniformly disperses pristine zinc oxide nanoparticles (NPs) in low-density polyethylene (LDPE). The critical conditions for film fabrication, such as temperature, LDPE concentration the solution, dissolution time, NP concentration, and post hot press cooling processes, are systematically studied. It is found that temperature needs be close melting of LDPE,...

The development of impact-resistant composite materials for protective applications such as helmet and body armor has attracted considerable attention. In this study, a novel aramid fiber-woven thermoplastic-epoxy was developed. Furthermore, three types woven textiles, namely three-dimensional (3D) orthogonal-woven (3DOW), 3D angle-interlock (3DAIW), two-dimensional plain-woven (2DPW) were used reinforcement structures. To study the effect structure, impact energy, damage repairment on...

Bevel gear drive is widely used, quality of which not only affects its own transmission performance, size and weight, but also has some impact on the machine's performance. This paper introduces optimization design software for bevel gear, in automatic realized. In mathematical model, programming data realization based genetic algorithm are described detail. The proposed integer  serial number encoding algorithm, effectively deals with continuous discrete variable problem reduces code length...

Electroneurophysiology has been more and widely used to evaluate the tactile comfort of fabrics. In our previous study, it was found that three different types subjects exist, namely extraordinary, ordinary, non-sensitive people, corresponding their electroneurophysiological responses fabric-skin contact. current 19 were recruited, including one extraordinary sensitive, eight ordinary sensitive 10 who tested with a smooth cotton fabric rough polyester in dynamic contact experiment....

Abstract In this study, a finite element low-velocity impact model of Twaron ® plain-woven fabric was created and analyzed using the commercial code ANSYS -AUTODYN, then validated by drop-weight experiments. As bullet or fragment can strike protective system from any angle in space, it is necessary to investigate behavior response threats all angles space. Therefore, in-plane obliquity θ , spatial φ were employed study 17 different simulation test scenarios with values carried out standard...

This study takes fast pattern generating as the goal and blouse research ob-ject, then raises up parametric design method based on numerical geometric constraint, take constraint solving for each part of pattern, furthermore, this paper uses geometry con-straint to complete process clothing patterns, pattern's pa-rametric database rule base is established, more important, establish data foun-dation apparel automatic generation system interactive modification. InstructionsThe industry a...

In the present study, a finite element impact model was created and analyzed by commercial FEM code ANSYS ® -AUTODYN then validated drop weight experiment. Moreover, models of single- multilayer panels plain weave as well different weaving architectures were designed with without holes to compare properties. The influence size location hole defect on behavior single-layer Twaron fabric investigated, degree defects sizes level investigated in. addition, effect multi-layer armor panel studied....

Protocol analysis is very important for engineers developing a complicate communication system, or network administrators supervision and fault diagnosis. Although several commercial protocol analyzers are available in the markets, they too expensive difficult to be altered fit with needs of new protocols. In this paper, we present platform based on open source software, which provides general, extensible, easy-to-use framework. We have implemented tested fully functional prototype TETRA...

This paper introduces a power quality analyzer with S3C2410 of 32 bits produced by Samsung corp. and analyses the circuits instrument. The system can sample signal in same time analog to digital converter module, process quality's data real processor. And communicate distortion serial communication interface Ethernet. instrument meet demand for online monitoring.