Mechanical properties and superconductivity in two-dimensional B2O under extreme strain

2019 ◽  
Vol 21 (46) ◽  
pp. 25859-25864
Author(s):  
Hefei Li ◽  
Yinqiao Hao ◽  
Dan Sun ◽  
Dan Zhou ◽  
Guangtao Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Two Dimensional ◽  
Cleavage Energy

A new monolayer B2O is proposed with a cleavage energy of 26 meV Å−2.

scholarly journals Performance of SCAN Meta-GGA Functionals on Nonlinear Mechanics of Graphene-Like g-SiC

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 120
Author(s):  
Qing Peng
Keyword(s):  
Mechanical Properties ◽  
Density Functional ◽  
Large Strains ◽  
Two Dimensional ◽  
Nonlinear Mechanics ◽  
Generalized Gradient ◽  
Mechanics Of Materials ◽  
Nonlinear Mechanical ◽  
Direct Band ◽  
Simulations And Modeling

Although meta-generalized-gradient approximations (meta-GGAs) are believed potentially the most accurate among the efficient first-principles calculations, the performance has not been accessed on the nonlinear mechanical properties of two-dimensional nanomaterials. Graphene, like two-dimensional silicon carbide g-SiC, has a wide direct band-gap with applications in high-power electronics and solar energy. Taken g-SiC as a paradigm, we have investigated the performance of meta-GGA functionals on the nonlinear mechanical properties under large strains, both compressive and tensile, along three deformation modes using Strongly Constrained and Appropriately Normed Semilocal Density Functional (SCAN) as an example. A close comparison suggests that the nonlinear mechanics predicted from SCAN are very similar to that of Perdew-Burke-Ernzerhof (PBE) formulated functional, a standard Density Functional Theory (DFT) functional. The improvement from SCAN calculation over PBE calculation is minor, despite the considerable increase of computing demand. This study could be helpful in selection of density functionals in simulations and modeling of mechanics of materials.

Monitoring the Travel Characteristics of High Voltage Circuit Breaker Based on TLD

2014 ◽  
Vol 687-691 ◽  
pp. 938-941
Author(s):  
Bao Shu Li ◽  
Shang Chen ◽  
Xian Ping Zhao ◽  
Wei Hua Niu
Keyword(s):  
Mechanical Properties ◽  
Circuit Breaker ◽  
Travel Speed ◽  
Video Tracking ◽  
Two Dimensional ◽  
High Voltage Circuit Breaker ◽  
Vacuum Circuit Breaker ◽  
Tracking Technology ◽  
Methods Of Measurement ◽  
Speed Characteristic

For the circuit breaker, mechanical fault make up the largest share of the fault. In order to ensure reliable and secure power system can run,it is necessary to monitor the mechanical properties of the circuit breaker,which includes monitoring the breaker trip.By TLD video tracking technology ZN65-12 vacuum circuit breaker mechanical properties were measured,obtain a two-dimensional direction of travel, speed characteristic curves.The experimental results show that the error of the method used to obtain a circuit breaker stroke, speed and other parameters of not more than 1mm,compared with traditional methods of measurement can get richer information.

scholarly journals Two-Dimensional Boron Hydride Sheets: High Stability, Massless Dirac Fermions, and Excellent Mechanical Properties

2016 ◽  
Vol 128 (35) ◽  
pp. 10448-10451 ◽  
Author(s):  
Yalong Jiao ◽  
Fengxian Ma ◽  
John Bell ◽  
Ante Bilic ◽  
Aijun Du
Keyword(s):  
Mechanical Properties ◽  
High Stability ◽  
Dirac Fermions ◽  
Two Dimensional ◽  
Boron Hydride

scholarly journals Flame-retardant MXene/Polyimide Film with Outstanding Thermal and Mechanical Properties Based on the Secondary Orientation Strategy

2021 ◽  
Author(s):  
Yue Zhu ◽  
Qingyu Peng ◽  
Haowen Zheng ◽  
Fuhua Xue ◽  
Pengyang Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Transition Metal ◽  
Mechanical Performance ◽  
Polyimide Film ◽  
Polymeric Films ◽  
Two Dimensional ◽  
Thermal And Mechanical Properties ◽  
Metal Carbides ◽  
Transition Metal Carbides

With the development of multifunction and miniaturization in modern electronics, polymeric films with strong mechanical performance and high thermal conductivity are urgently needed. Two-dimensional transition metal carbides and nitrides (MXenes)...

Two-dimensional coordination polymers and metal–organic gels of symmetrical and unsymmetrical dipyridyl β-diketones: luminescence, dye absorption and mechanical properties

2016 ◽  
Vol 40 (3) ◽  
pp. 1997-2006 ◽  
Author(s):  
Kaustuv Banerjee ◽  
Kumar Biradha
Keyword(s):  
Mechanical Properties ◽  
Functional Groups ◽  
Coordination Polymers ◽  
Two Dimensional ◽  
Dye Absorption ◽  
Metal Organic

The ligands containing chelating as well as exodentate functional groups were shown to form functional coordination polymers and heterometallic gels.

Graphene Composites

2019 ◽  
Vol 23 ◽  
pp. 57-63 ◽  
Author(s):  
Chin Wei Lai
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Polymer Composites ◽  
Applied Research ◽  
Scientific Literature ◽  
Filler Content ◽  
2D Materials ◽  
Industrial Applications ◽  
Research Interest ◽  
Two Dimensional

This chapter reviews recent development of graphene-based polymer composites. The formation of graphene oxide and graphene are a vital two dimensional (2D) material has received a lot of research interest in commercialization aspect due to its excellent electrical, thermal as well as mechanical properties at very low filler content. In this manner, utilization of graphene-based polymer composites with different polymer matrixes have been attracted increasing attention in recent years for both fundamental studies and applied research into industrial applications in many fields. Herein, novel properties of polymer (epoxy, polystyrene, and PANI) / graphene composites will be reviewed along with detailed examples drawn from the scientific literature. Keywords: Graphene-based polymer composites, thermo-mechanical properties, two dimensional (2D) materials

Effect of Treating Time on Mechanical Properties and Structure of Aramid Fibers during Heat Drawing

2015 ◽  
Vol 789-790 ◽  
pp. 71-74
Author(s):  
Hai Juan Kong ◽  
Peng Yang ◽  
Cui Qing Teng ◽  
Ahmed M.S. Dawelbeit ◽  
Mu Huo Yu
Keyword(s):  
Mechanical Properties ◽  
Heat Treating ◽  
Line Orientation ◽  
Wide Angle ◽  
Drawing Process ◽  
Two Dimensional ◽  
High Modulus ◽  
Aramid Fibers ◽  
Crystalline Perfection ◽  
Angle Scattering

High modulus Poly (p-phenyleneterephalamide)(PPTA) fibers was prepared by heat drawing process, in which the fibers rearranged their structures for further improvements in their crystalline perfection, crystal line orientation. The modulus of PPTA fibers could be improved when fibers treated in an appropriate condition. The influences of heat treating time on the structures of the fibers and their properties were investigated by using two-dimensional wide-angle scattering (WAXS).

scholarly journals Nanoreinforcements of Two-Dimensional Nanomaterials for Flame Retardant Polymeric Composites: An Overview

2019 ◽  
Vol 2019 ◽  
pp. 1-25 ◽  
Author(s):  
Shaolin Lu ◽  
Wei Hong ◽  
Xudong Chen
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Flame Retardants ◽  
Polymer Materials ◽  
Two Dimensional ◽  
Environmental Friendliness ◽  
Fire Hazards ◽  
Uniform Dispersion ◽  
Physical Barriers ◽  
Flame Retardant Properties

Polymer materials are ubiquitous in daily life. While polymers are often convenient and helpful, their properties often obscure the fire hazards they may pose. Therefore, it is of great significance in terms of safety to study the flame retardant properties of polymers while still maintaining their optimal performance. Current literature shows that although traditional flame retardants can satisfy the requirements of polymer flame retardancy, due to increases in product requirements in industry, including requirements for durability, mechanical properties, and environmental friendliness, it is imperative to develop a new generation of flame retardants. In recent years, the preparation of modified two-dimensional nanomaterials as flame retardants has attracted wide attention in the field. Due to their unique layered structures, two-dimensional nanomaterials can generally improve the mechanical properties of polymers via uniform dispersion, and they can form effective physical barriers in a matrix to improve the thermal stability of polymers. For polymer applications in specialized fields, different two-dimensional nanomaterials have potential conductivity, high thermal conductivity, catalytic activity, and antiultraviolet abilities, which can meet the flame retardant requirements of polymers and allow their use in specific applications. In this review, the current research status of two-dimensional nanomaterials as flame retardants is discussed, as well as a mechanism of how they can be applied for reducing the flammability of polymers.

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