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Online since: November 2012
Authors: Hong Yuan Su, Ming Li, Dong Ping Wang, Feng Liu
., Ltd, Tangshan 063035,China
2School of Mechanical Engineering, Dalian Jiaotong University, Dalian 116028, China.
So, strong crosswind effect is one of the important factors of safety of train[1-2].
In paper [3], the aerodynamics properties of EMU CRH2 running at 200 km/h in strong wind were numerically simulated.
Zhang: Aerodynamics Properties of High-speed Train in Strong Wind.
Zhang: Train-crosswind and Strong Wind Countermeasure Research in Japan Flow Structure and aerodynamic properties of train under crosswind running in the embankment .
So, strong crosswind effect is one of the important factors of safety of train[1-2].
In paper [3], the aerodynamics properties of EMU CRH2 running at 200 km/h in strong wind were numerically simulated.
Zhang: Aerodynamics Properties of High-speed Train in Strong Wind.
Zhang: Train-crosswind and Strong Wind Countermeasure Research in Japan Flow Structure and aerodynamic properties of train under crosswind running in the embankment .
Online since: September 2024
Authors: Andriy Melnichenko, Oleg Kulakov, Albert Katunin, Andrei Lesko
This approach allows taking into account all factors of possible accident development.
The most common are express methods that take into account only the most important factors with a certain step of parameter change [13].
At the same time, the intensity of sorption depends not only on the surrounding conditions, but also on the surface properties of the liquid and the physical and chemical properties of HCM [33].
The use of mechanical lifts can increase the height of the sorbent jet supply up to 50 m.
Kozlovskaya, A study of significant factors affecting the quality of water in the Oskil River (Ukraine).
The most common are express methods that take into account only the most important factors with a certain step of parameter change [13].
At the same time, the intensity of sorption depends not only on the surrounding conditions, but also on the surface properties of the liquid and the physical and chemical properties of HCM [33].
The use of mechanical lifts can increase the height of the sorbent jet supply up to 50 m.
Kozlovskaya, A study of significant factors affecting the quality of water in the Oskil River (Ukraine).
Online since: August 2016
Authors: Ya Feng Yang, Ma Qian, J.F. Sun, Ying Ying Sun, Shu Dong Luo
There are some unidentified factors which can also dictate the heating response of TiH2 powder
Vacuum condition (low or high levels) is not the key factor which affects the heating response of TiH2 to pure MW radiation.
The dictating factors thus remain unclear.
Roy, Microwave sintering and mechanical properties of PM copper steel.
Qian, Microwave heating, isothermal sintering, and mechanical properties of powder metallurgy titanium and titanium alloys.
Vacuum condition (low or high levels) is not the key factor which affects the heating response of TiH2 to pure MW radiation.
The dictating factors thus remain unclear.
Roy, Microwave sintering and mechanical properties of PM copper steel.
Qian, Microwave heating, isothermal sintering, and mechanical properties of powder metallurgy titanium and titanium alloys.
Online since: May 2012
Authors: Zhi Guang Chen, Chao Kui Qin, Yang Jun Zhang, Chun Yan Tian
Experiment Study on Interchangeability of Multi-source Natural Gas for Domestic Appliance
Zhiguang Chen 1, a, Chaokui Qin 1, b, Yangjun Zhang 1, c, Chunyan Tian 1, d
College of Mechanical Engineering, Tongji University, Shanghai 200092, China
achenzhiguang@tongji.edu.cn, bchkqin@tongji.edu.cn, czyjtongji@163.com, dtchyan316@163.com
Keywords: natural gas, interchangeability, domestic appliance liquefied natural gas (LNG).
Through the testing result it can conclude that the heat load of domestic appliances changes consistently with Wobbe Index of gases; well-adjusted domestic appliances can interchange within the different source gases and without materially increasing in CO and NOx emissions, but the efficiency of gas appliance will be largely affected.
Table 1 Components and Properties of Natural Gases CH4 (%) C2H6 (%) C3H8 (%) C4H10 (%) CO2 (%) N2 (%) W(MJ/m3) Sichuan Natural Gas 96.00 0.70 0.20 0.10 2.30 0.70 48.3 Huizhou offshore Gas 85.99 9.61 0.20 0.00 3.60 0.60 48.8 Turkmenistan Gas 92.79 4.00 0.30 0.30 1.80 0.80 49.4 Yuexi LNG1 98.50 0.00 0.30 0.10 0.00 1.10 50.1 Zhuhai Lean LNG 97.00 1.90 0.30 0.10 0.00 0.70 50.6 Yuedong LNG 95.60 2.40 0.60 0.60 0.10 0.70 50.9 Yuexi LNG2 90.70 7.50 0.30 0.10 0.20 1.20 51.1 Liwan offshore Gas 84.40 4.70 2.40 5.20 0.90 2.40 52.4 Zhuhai Rich LNG 89.40 6.00 3.20 1.10 0.00 0.30 52.9 Dapeng LNG 86.60 9.00 2.90 0.90 0.10 0.50 53.0 Experiment Equipment.
The thermal efficiency of gas stoves is directly affected by structure of burner, secondary air supplying and some other factors.
GB/T 13611-2006 Classification and essential property of city gas[S].
Through the testing result it can conclude that the heat load of domestic appliances changes consistently with Wobbe Index of gases; well-adjusted domestic appliances can interchange within the different source gases and without materially increasing in CO and NOx emissions, but the efficiency of gas appliance will be largely affected.
Table 1 Components and Properties of Natural Gases CH4 (%) C2H6 (%) C3H8 (%) C4H10 (%) CO2 (%) N2 (%) W(MJ/m3) Sichuan Natural Gas 96.00 0.70 0.20 0.10 2.30 0.70 48.3 Huizhou offshore Gas 85.99 9.61 0.20 0.00 3.60 0.60 48.8 Turkmenistan Gas 92.79 4.00 0.30 0.30 1.80 0.80 49.4 Yuexi LNG1 98.50 0.00 0.30 0.10 0.00 1.10 50.1 Zhuhai Lean LNG 97.00 1.90 0.30 0.10 0.00 0.70 50.6 Yuedong LNG 95.60 2.40 0.60 0.60 0.10 0.70 50.9 Yuexi LNG2 90.70 7.50 0.30 0.10 0.20 1.20 51.1 Liwan offshore Gas 84.40 4.70 2.40 5.20 0.90 2.40 52.4 Zhuhai Rich LNG 89.40 6.00 3.20 1.10 0.00 0.30 52.9 Dapeng LNG 86.60 9.00 2.90 0.90 0.10 0.50 53.0 Experiment Equipment.
The thermal efficiency of gas stoves is directly affected by structure of burner, secondary air supplying and some other factors.
GB/T 13611-2006 Classification and essential property of city gas[S].
Online since: September 2004
Authors: W. Sun, Thomas H. Hyde
The material properties used in the analyses are shown in Table 2
[14].
Detailed material properties used for these welds can be seen in Ref. [14].
This clearly illustrates the main features of life reduction due to the presence of welds, an additional life reduction due to increased axial stress and the more limited life reduction due to geometry factors.
Some typical numerical results obtained for a number of pressurised pipe and weld related components, are presented to illustrate the main behaviour, from which the effects of some factors (e.g. geometry, material and loading modes), which affect the failure behaviour of high temperature components under creep, can be seen.
FE analyses have been primarily concerned with the estimation of failure life and to assess factors influencing the life of high temperature components.
Detailed material properties used for these welds can be seen in Ref. [14].
This clearly illustrates the main features of life reduction due to the presence of welds, an additional life reduction due to increased axial stress and the more limited life reduction due to geometry factors.
Some typical numerical results obtained for a number of pressurised pipe and weld related components, are presented to illustrate the main behaviour, from which the effects of some factors (e.g. geometry, material and loading modes), which affect the failure behaviour of high temperature components under creep, can be seen.
FE analyses have been primarily concerned with the estimation of failure life and to assess factors influencing the life of high temperature components.
Online since: January 2010
Authors: J.M. Guilemany, Nuria Cinca, Sergi Dosta, Javier Fernández
Most of the research undergone up to now investigates such properties in
bulk materials.
Some other basic properties, apart from the transformation temperature, of the stoichiometric NiTi alloys can be also found elsewhere [5, 6, 7].
As chemical composition is then critical for the shape memory properties, all melting processes must be done in a vacuum or an inert atmosphere in order to avoid the reactivity of the titanium in these alloys.
Factors that may influence the transformation temperature are: (i) Ti-rich and Ni-rich compositions (these show respectively NiTi2 and Ti3Ni4 precipitates) where excess nickel strongly depresses the transformation temperature and increases the yield strength of the austenite; (ii) common contaminants such as oxygen and carbon (Ti4Ni2OX and TiCXNi1-X) can also shift the transformation temperature and degrade the mechanical properties and, (iii) the elimination of local stresses after a heat treatment produces an increase of the transformation temperature.
Hodgson, Shape Memory Alloys, Properties and selection: nonferrous alloys and special purpose materials.
Some other basic properties, apart from the transformation temperature, of the stoichiometric NiTi alloys can be also found elsewhere [5, 6, 7].
As chemical composition is then critical for the shape memory properties, all melting processes must be done in a vacuum or an inert atmosphere in order to avoid the reactivity of the titanium in these alloys.
Factors that may influence the transformation temperature are: (i) Ti-rich and Ni-rich compositions (these show respectively NiTi2 and Ti3Ni4 precipitates) where excess nickel strongly depresses the transformation temperature and increases the yield strength of the austenite; (ii) common contaminants such as oxygen and carbon (Ti4Ni2OX and TiCXNi1-X) can also shift the transformation temperature and degrade the mechanical properties and, (iii) the elimination of local stresses after a heat treatment produces an increase of the transformation temperature.
Hodgson, Shape Memory Alloys, Properties and selection: nonferrous alloys and special purpose materials.
Online since: July 2008
Authors: Shui Sheng Xie, Zhi Ming Du, Ping Wu, Yan Ying Zhang
However, products processed by extrusion, forging and rolling have higher
strength, better ductility and various mechanical property compared to cast alloys, which meet the
demands of more structures, and have excellent performance that can not be replaced by cast alloys
[2].
Many factors affect the sheet quality during semi-solid roll strip-casting process, for instance, the flow behavior in molten pool, heat transfer phenomena between rolls and cast sheet, and the control of position of solidification final point.[7, 8].
Table 1 Equipment parameters and simulation conditions Roll size, mm Φ210×280 Roll gap, mm 6 Roll speed, m/min 2,3,4 Height of molten pool, mm 40 Rolling temperature, °C 545 Step, s 0.02 The material used in the study was AZ91D magnesium alloy, the physical properties of which are shown in Table 2.
We also assume that these properties keep constant during the rolling process.
Table 2 Physical properties of AZ91D magnesium alloy Physical properties Values Solidus temperature, °C 470 Liquidus temperature, °C 595 Thermal-conductivity , N·°C/S 72 Heat capacity, N°C/mm2 1.9 2.1 Establishment of geometric model.
Many factors affect the sheet quality during semi-solid roll strip-casting process, for instance, the flow behavior in molten pool, heat transfer phenomena between rolls and cast sheet, and the control of position of solidification final point.[7, 8].
Table 1 Equipment parameters and simulation conditions Roll size, mm Φ210×280 Roll gap, mm 6 Roll speed, m/min 2,3,4 Height of molten pool, mm 40 Rolling temperature, °C 545 Step, s 0.02 The material used in the study was AZ91D magnesium alloy, the physical properties of which are shown in Table 2.
We also assume that these properties keep constant during the rolling process.
Table 2 Physical properties of AZ91D magnesium alloy Physical properties Values Solidus temperature, °C 470 Liquidus temperature, °C 595 Thermal-conductivity , N·°C/S 72 Heat capacity, N°C/mm2 1.9 2.1 Establishment of geometric model.
Online since: February 2013
Authors: Tie Heng Sun, Lei Chao, Li Na Sun, Su Chen
Cadmium (Cd), lead (Pb), etc. absorption and accumulation of plants are affected by many factors, such as soil texture, pH value, organic matter, coexisting elements [2-5], etc.
Basic physical and chemical properties of the soil are shown in Table 1.
Basic physical and chemical properties of soil are measured by conventional analysis of soil agrochemistry [6].
Cd and Zn belong to the same element family, which have similar chemical properties.
Such an interaction is one of main factors that affect Cd absorption and accumulation of plants.
Basic physical and chemical properties of the soil are shown in Table 1.
Basic physical and chemical properties of soil are measured by conventional analysis of soil agrochemistry [6].
Cd and Zn belong to the same element family, which have similar chemical properties.
Such an interaction is one of main factors that affect Cd absorption and accumulation of plants.
Online since: August 2010
Authors: Fa Zhan Yang, Chang He Li, Yong Yang
Introduction
Ti6Al4V alloy has been regarded as crucial material of modern aerospace industry because of its
excellent mechanical properties [1].
However, the main factors that causes monolithic component distortion is redistribution of residual stress during material removal and low rigidity of workpiece.
The Johnson-Cook material law is established with the help of high strain rate mechanical experiment using the SHPB method.
Because the acting spot of cutting loads is local and the affected region is very small, based on theory of SWINAN, it is equivalent that the loads on arc li are applied on arc li1 and li2 .
Sun: Chinese Journal of mechanical engineering Vol. 68-71 (2005), p. 117-122 (In Chinese) [5] Z.J.
However, the main factors that causes monolithic component distortion is redistribution of residual stress during material removal and low rigidity of workpiece.
The Johnson-Cook material law is established with the help of high strain rate mechanical experiment using the SHPB method.
Because the acting spot of cutting loads is local and the affected region is very small, based on theory of SWINAN, it is equivalent that the loads on arc li are applied on arc li1 and li2 .
Sun: Chinese Journal of mechanical engineering Vol. 68-71 (2005), p. 117-122 (In Chinese) [5] Z.J.
Online since: August 2013
Authors: Eugenio Brusa
Table 1 : Geometric properties of the bearing SKF©314833B.
Unfortunately, literature poorly suggest some typical mechanical properties like the ultimate tensile strength, yielding stress (if present), fatigue limit and toughness of piezoelectric materials.
A current goal of the research activity is studying new composite materials where the mechanical strength and the electromechanical coupling factor can be both fairly high.
Mechanical properties of high energy density piezoelectric ceramics, Mat.
Comparative study of piezoelectric matrials properties for green energy harvesting from vibration, Proc.2010 Annual IEEE Indian Conference, 2010
Unfortunately, literature poorly suggest some typical mechanical properties like the ultimate tensile strength, yielding stress (if present), fatigue limit and toughness of piezoelectric materials.
A current goal of the research activity is studying new composite materials where the mechanical strength and the electromechanical coupling factor can be both fairly high.
Mechanical properties of high energy density piezoelectric ceramics, Mat.
Comparative study of piezoelectric matrials properties for green energy harvesting from vibration, Proc.2010 Annual IEEE Indian Conference, 2010