Effect Of The High-Temperature Pulse Deuterium Plasma On The Surface Structure Of Vanadium And Its Physical-Mechanical Characteristics

2003 ◽  
Author(s):  
I. V. Borovitskaya
Keyword(s):  
High Temperature ◽  
Surface Structure ◽  
Mechanical Characteristics ◽  
Deuterium Plasma ◽  
Temperature Pulse

scholarly journals Research on the Mechanical Characteristics of H-section Steel Frame under the Action of Thermo Mechanical Coupling

2021 ◽  
Vol 233 ◽  
pp. 03022
Author(s):  
Yucheng LI ◽  
Wei WANG ◽  
Xing WANG
Keyword(s):  
High Temperature ◽  
Plastic Strain ◽  
Mechanical Characteristics ◽  
Simulation Software ◽  
Frame Structure ◽  
Concentrated Load ◽  
Composite Frame ◽  
Fire Environment ◽  
Full Cross Section ◽  
Composite Frame Structure

The research on the mechanical characteristics of concrete-filled steel tubular composite frame under high temperature fire environment is one of the research hotspots. In this paper, the finite element simulation software is used to analyze the concrete-filled steel tubular composite frame structure. The failure mode of the flexural deformation of the composite frame structure under high temperature fire environment is introduced. The simulation results of the deformation and displacement of the single-layer single span and two-layer two-span composite frame structure are deeply studied, including the different temperature field, structural field, structural field of each beam and column The results show that: with the temperature rising, the horizontal plastic strain, vertical displacement and local plastic region of beam and column are redistributed and changed in high temperature fire environment, and the flexural effect of two-story two-span concrete-filled steel tubular composite frame under different fire positions is analyzed. The results show that: with the temperature rising, the horizontal plastic strain at the concentrated load is not the results show that the deflection and deformation redistribution are obvious, and the deflection and deformation redistribution are obvious at the joint points of beams and columns. Finally, a mechanism is formed and destroyed. The flexure effect of mode 1 is larger than that of condition 2, which indicates that the flexural effect of two-story two span CFST composite frame under full cross-section fire is larger than that of condition 2 It should be better. The research results can provide reference value for the reinforcement and repair of CFST composite frame under high temperature fire.

Deuterium and helium retention in W with and without He-induced W ‘fuzz’ exposed to pulsed high-temperature deuterium plasma

2019 ◽  
Vol 515 ◽  
pp. 150-159 ◽  
Author(s):  
O.V. Ogorodnikova ◽  
K.S. Klimov ◽  
А.G. Poskakalov ◽  
A.V. Kaziev ◽  
M.M. Kharkov ◽  
...  
Keyword(s):  
High Temperature ◽  
Deuterium Plasma

Surface Chemistry of 2-Propanol on TiO2(110):  Low- and High-Temperature Dehydration, Isotope Effects, and Influence of Local Surface Structure

2007 ◽  
Vol 111 (29) ◽  
pp. 11059-11067 ◽  
Author(s):  
Oleksandr Bondarchuk ◽  
Yu Kwon Kim ◽  
J. M. White ◽  
Jooho Kim ◽  
Bruce D. Kay ◽  
...  
Keyword(s):  
High Temperature ◽  
Surface Chemistry ◽  
Surface Structure ◽  
Isotope Effects ◽  
Local Surface

scholarly journals Mechanical Characteristics of Cement-Based Grouting Material in High-Geothermal Tunnel

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1572 ◽  
Author(s):  
Mingnian Wang ◽  
Yunpeng Hu ◽  
Cheng Jiang ◽  
Yicheng Wang ◽  
Dagang Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Relative Humidity ◽  
Mechanical Characteristics ◽  
Coupling Effect ◽  
Peak Stress ◽  
Curing Temperature ◽  
Peak Strain ◽  
Humidity Effect ◽  
Grouting Material ◽  
Study Results

The cement-based grouting materials used for practical purposes in high-geothermal tunnels are inevitably affected by humidity and high temperature, leading to the deterioration of mechanical properties. Based on the characteristics of changing high temperatures and two typical conditions of hot-humid and hot-dry environments in high-geothermal tunnels, many mechanical strength tests were carried out on the grouting material cured under different environmental conditions. The study results indicated that high temperature and low relative humidity were unfavorable to the development of mechanical characteristics of grouting material, but the coupling effect of two factors could improve the strength at early ages and reduce the degradation of long-term strength. As the curing temperature exceeded 56.3 °C, the humidity effect on strength played a more important role in recovering the strength of grouting material damaged by high temperature. Temperature had more significant impact on the relative peak stress while the relative humidity had greater influence on the relative peak strain. A calculation compressive constitutive model was prospered, which considering both temperature and relative humidity. The study results may provide much valuable experimental data and theoretical supporting for the design of compression constitutive of cement-based grouting material in high-geothermal tunnel.

Modification of Activated Carbon and its Application on Adsorption of UDMH Gas

2013 ◽  
Vol 634-638 ◽  
pp. 1026-1030 ◽  
Author(s):  
Huan Chun Wang ◽  
Xiao Li Gou ◽  
Xiao Meng Lv
Keyword(s):  
Activated Carbon ◽  
High Temperature ◽  
Transition Metal ◽  
Surface Structure ◽  
Functional Groups ◽  
Room Temperature ◽  
Activated Carbons ◽  
Metal Solution ◽  
Modified Activated Carbons

Two kinds of modified activated carbons were prepared by dipping with Zn(NO3)2 solution and by reducing in the atmosphere of N2 at high temperature respectively, which were characterized by FTIR,DSC,SEM and EDS. The surface structure was strongly changed in the process, along with the changes of chemical functional groups. The results of adsorption experiments revealed that the adsorbent capacities of UDMH gas at room temperature were enhanced obviously by modification compared with the raw activated carbon, especially dipped by transition metal solution. The mechanism probably involved was also discussed.

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