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Online since: September 2024
Authors: Enkhtor Sukhbaatar, Erdene-Ochir Ganbold, Rentsenmyadag Dashzeveg, Munkhtsetseg Sambuu, Narkhajid Ganbold, Baasanjargal Saruultuya, Bilguun-Od Norov, Munkhjin Ganbold, Altankhuu Bayarsaikhan, Rene Tschaggelar
Dugarjav et al. [7]
were focused on producing biochar products through pyrolysis process and established thermal energy
quantification, though not yet defined production properties in level of molecular structure.
In other hand, characteristics, particularly, physicochemical properties of productions made from solid biomaterials can be dependent on individual pyrolysis reaction [10-12].
Moreover, many other factors such as combustion kinetics, kinetic rates of conversion processes, pyrolysis processing duration, elemental consistency of original materials could affect [10, 18-20] in effectiveness of the production and its further properties.
For example, at temperature range between 2000C and 3000C the torrefaction in which improvement of mechanical properties comes out [8].
Table 2: Heavy elemental analysis result of produced biochar Element content, % or ppm Al, % Ca, % S, % Fe, % Mg, % P, % Mn, ppm Ag, ppm Ba, ppm 1.80 1.89 0.64 1.16 0.37 0.53 23.18 <1 2.06 Proximate analysis result is one of key properties of coal like productions.
In other hand, characteristics, particularly, physicochemical properties of productions made from solid biomaterials can be dependent on individual pyrolysis reaction [10-12].
Moreover, many other factors such as combustion kinetics, kinetic rates of conversion processes, pyrolysis processing duration, elemental consistency of original materials could affect [10, 18-20] in effectiveness of the production and its further properties.
For example, at temperature range between 2000C and 3000C the torrefaction in which improvement of mechanical properties comes out [8].
Table 2: Heavy elemental analysis result of produced biochar Element content, % or ppm Al, % Ca, % S, % Fe, % Mg, % P, % Mn, ppm Ag, ppm Ba, ppm 1.80 1.89 0.64 1.16 0.37 0.53 23.18 <1 2.06 Proximate analysis result is one of key properties of coal like productions.
Online since: December 2012
Authors: Wu Xing Lai, Ping Yuan, Guo Qiang Xu
And moreover, the weight and load also affect the container.
As Fig. 1 depicts, the whole length of the container is: l=4×[G1×1ρ1+1.015 ρ2×η2+3.980×η3 ρ3-Vs]π×d2+ls+lk Eq. 1 The level with the returning distillate is: h1=4×(1.015G1 ρ2×η2+3.980G1×η3 ρ3-Vs)π×d2+ls Eq. 2 Fig. 1 Structure diagram a) G1:Capacity of single sponge titanium stove, 12t b) ρ1,ρ2,ρ3:Densities of Ti, Mg,MgCl2 at 870℃~900℃, ρ1≈4.51t/m³,ρ2≈1.555t/m³, ρ3≈1.672t/m³ c) η2:Operating factor of Mg, η2=65% d) η3:Returning rate of MgCl2, η3=5% e) The oval in the bottom:long axis a=1.095m, minor axis b=0.6m=ls, h=2a=2.190m, the volume of the half oval, Vs=12V=12πabh=2.259m³ f) lk:The distance between the reaction surface and the head cover,0.6m The result is l=5500mm.
Fig. 3 Finite element model of the reduction container The mechanical properties of the materials are given in Table 1.
Table 1 Mechanical properties of the materials Material Name Young’s Modulus (N/m^2) Poisson’s ratio Density (kg/ m^3) Yield strength (N/m^2) Isotropic thermal conductivity Carbon steel(45#) 2.07E+11 0.31 7750 5.86E+08 43 Stainless steel (W18Cr4V) 2.07E+11 0.29 7750 5.86E+08 15.1 Results of the finite element analysis.
As Fig. 1 depicts, the whole length of the container is: l=4×[G1×1ρ1+1.015 ρ2×η2+3.980×η3 ρ3-Vs]π×d2+ls+lk Eq. 1 The level with the returning distillate is: h1=4×(1.015G1 ρ2×η2+3.980G1×η3 ρ3-Vs)π×d2+ls Eq. 2 Fig. 1 Structure diagram a) G1:Capacity of single sponge titanium stove, 12t b) ρ1,ρ2,ρ3:Densities of Ti, Mg,MgCl2 at 870℃~900℃, ρ1≈4.51t/m³,ρ2≈1.555t/m³, ρ3≈1.672t/m³ c) η2:Operating factor of Mg, η2=65% d) η3:Returning rate of MgCl2, η3=5% e) The oval in the bottom:long axis a=1.095m, minor axis b=0.6m=ls, h=2a=2.190m, the volume of the half oval, Vs=12V=12πabh=2.259m³ f) lk:The distance between the reaction surface and the head cover,0.6m The result is l=5500mm.
Fig. 3 Finite element model of the reduction container The mechanical properties of the materials are given in Table 1.
Table 1 Mechanical properties of the materials Material Name Young’s Modulus (N/m^2) Poisson’s ratio Density (kg/ m^3) Yield strength (N/m^2) Isotropic thermal conductivity Carbon steel(45#) 2.07E+11 0.31 7750 5.86E+08 43 Stainless steel (W18Cr4V) 2.07E+11 0.29 7750 5.86E+08 15.1 Results of the finite element analysis.
Online since: April 2022
Authors: Khaled Abou-El-Hossein, Peter Babatunde Odedeyi
Rapidly solidified aluminium (RSA) alloys have been identified among few materials suitable for optical applications due to its good optical and physical properties.
As a result of these good properties, RSA has been widely used for making mould inserts for optical plastic injection; and mirrors for opto-electronics, medical, defense, aerospace, and communications applications [6].
Tool nose radius may affect the surface roughness, residual stress and chip morphology [15, 16].
The nose radius was discovered to be a factor in the generation of strong cutting forces during the cutting operation.
Frontiers of Mechanical Engineering, 2017. 12(2): p. 158-180
As a result of these good properties, RSA has been widely used for making mould inserts for optical plastic injection; and mirrors for opto-electronics, medical, defense, aerospace, and communications applications [6].
Tool nose radius may affect the surface roughness, residual stress and chip morphology [15, 16].
The nose radius was discovered to be a factor in the generation of strong cutting forces during the cutting operation.
Frontiers of Mechanical Engineering, 2017. 12(2): p. 158-180
Online since: February 2013
Authors: Shi Jie Wang, Xiao Ren Lv, Xu Yao Huo, Guang Zu Qu
The ring-on-block tester produced by Jinan PuYe Electrical and Mechanical Technology Co, Ltd was used to perform the wear experiment, and its configuration is shown in figure 1.
After some time, oil-water stratification phenomenon appears due to their incompatibility which affects the wear of rubber in the mixture of crude oil with water[6-7].
At the same time, in the water-in-oil condition, property of the mixture presents as similar as that of crude oil, and the frictional coefficient is basic the same as that in the crude oil.
In the oil-in-water condition, property of the mixture presents as similar as that of pure water, the frictional coefficient is basic the same as in the pure water.
Research on Rheological Properties of W/O Emulsion[J].
After some time, oil-water stratification phenomenon appears due to their incompatibility which affects the wear of rubber in the mixture of crude oil with water[6-7].
At the same time, in the water-in-oil condition, property of the mixture presents as similar as that of crude oil, and the frictional coefficient is basic the same as that in the crude oil.
In the oil-in-water condition, property of the mixture presents as similar as that of pure water, the frictional coefficient is basic the same as in the pure water.
Research on Rheological Properties of W/O Emulsion[J].
Online since: July 2020
Authors: Zhi Li, Chun Yu Ma
From the results obtained, the influence of Os doping on structural, optical and photophysical properties of N-TiO2 thin films is discussed.
Optical Properties Study.
Conclusion Os and N co-doped TiO2 films were fabricated by RF magnetron sputtering and their structural, optical and photocatalytic properties were investigated.
[3] X.Q.Cheng, C.Y.Ma, X.Y.Yi, F.Yuan, Y.Xie, J.M.Hu, B.C.Hu, Q.Y.Zhang, Structural, morphological, optical and photocatalytic properties of Gd-doped TiO2 films, Thin Solid Films 615(2016) 13-18
[14] X.Y.Pan, M.Q.Yang, X.Z.Fu, N.Zhang, Y.J.Xu, Defective TiO2 with oxygen vacancies: synthesis, properties and photocatalytic applications, Nanoscale 5(2013) 3601-3604
Optical Properties Study.
Conclusion Os and N co-doped TiO2 films were fabricated by RF magnetron sputtering and their structural, optical and photocatalytic properties were investigated.
[3] X.Q.Cheng, C.Y.Ma, X.Y.Yi, F.Yuan, Y.Xie, J.M.Hu, B.C.Hu, Q.Y.Zhang, Structural, morphological, optical and photocatalytic properties of Gd-doped TiO2 films, Thin Solid Films 615(2016) 13-18
[14] X.Y.Pan, M.Q.Yang, X.Z.Fu, N.Zhang, Y.J.Xu, Defective TiO2 with oxygen vacancies: synthesis, properties and photocatalytic applications, Nanoscale 5(2013) 3601-3604
Online since: September 2021
Authors: Xavier Fernando Hurtado, Maritzabel Molina
These types of connectors were endorsed by experimental push-out tests on hot-rolled steel (HRS) sections, which have different mechanical properties concerning CFS sections, mainly regarding susceptibility to local buckling.
The material properties of the components of the finite element models were represented by constitutive laws and their nominal properties.
Nominal properties are presented in Table 2.
Table 2 Nominal mechanical properties of steel components.
The affected area is larger in lower-strength concrete (Fig 17).
The material properties of the components of the finite element models were represented by constitutive laws and their nominal properties.
Nominal properties are presented in Table 2.
Table 2 Nominal mechanical properties of steel components.
The affected area is larger in lower-strength concrete (Fig 17).
Online since: October 2023
Authors: Oleksii Basmanov, Serhii Hovalenkov, Alexander Savchenko
It is during this period of time that it is necessary to evacuate tanks from the heat-affected zone or to begin cooling them.
Not taken into account a number of factors that are to a large item penalties can affect the time: - burning area; - type of burning substance; - distance from the tank to the burning site; - direction and speed of the wind tilting the torch, etc.
Advantages: used in laboratory studies of the properties of GFS (OP-301 sprayers).
These methods make it possible to obtain finely divided drops, which positively affects the gel formation on the protected surface.
The technology is implemented in standard firefighting equipment (PS-5 foam mixer); it is used for dosed addition of a foaming agent solution into water and for obtaining air-mechanical foam.
Not taken into account a number of factors that are to a large item penalties can affect the time: - burning area; - type of burning substance; - distance from the tank to the burning site; - direction and speed of the wind tilting the torch, etc.
Advantages: used in laboratory studies of the properties of GFS (OP-301 sprayers).
These methods make it possible to obtain finely divided drops, which positively affects the gel formation on the protected surface.
The technology is implemented in standard firefighting equipment (PS-5 foam mixer); it is used for dosed addition of a foaming agent solution into water and for obtaining air-mechanical foam.
Online since: June 2014
Authors: Wei Han, Xiao Yu Jia
In recent years, it has been used widely in the USA, Japan and Taiwan ,This article introduces classification of brb briefly as well as the influence of mechanics property and arranging position and so on to resist earthquake.
The main difference between the steel buckling restrained brace and concrete constrained buckling restrained brace is that former constrained component is made of steel, the core force element section is mainly shown in the form of "一" , "十" , "T", groove type, tube type , constraint element are mainly single tube, double steel pipe steel pipe and, etc[5]. 2 Design of buckling restrained brace The axial buckling restrained brace stiffness and internal structure, the elastic modulus of steel core material and other factors, stiffness and axial stiffness and the number of support, setting angle of between layers lateral.
The calculation of ultimate bearing capacity of brb: (4) Where Ry is overstrength factor yield section steel core, for the Q235 steel, Ry=1.15, ω is the strain hardening coefficient, for the Q235 steel, ω=1.6, Fby is brb yield capacity.
(a)Compressive Buckling Behavior of ordinary support (b) Anti compression buckling stability behavior support Fig.6 Compression behavior of ordinary brace and brb (2) simpler Flexible structure design ①The brb can easily adjust the support stiffness by changing the core length support according to the strength of selection section, as a result ,the design more flexible. ②For the irregular plane structure, the stiffness center and the center of mass are often incon-sistent, the brb can be obtained better effect than the common support by adjusting the structure of the torsional stiffness. ③The brb can also give structure to provide adequate stiffness and damping, without the use of large support, the space utilization rate is higher. ④In the structure design, brb can be simplified as two force model, the constitutive relation of the bilinear model, mechanical model is more simple
(4) High reliability and maintainability Compared with the viscous damper and friction damper, BRB does not exist the problem of oil leakage, yield force depends on the steel material, will not be affected by the natural environment , so its performance is more stable and reliable. 5 Conclusions To sum up, the following conclusions can be drawn: (1) In the earthquake, the brb has good hysteretic performance, plump hysteretic curve, stability, energy dissipation capacity, the seismic performance of the structure
The main difference between the steel buckling restrained brace and concrete constrained buckling restrained brace is that former constrained component is made of steel, the core force element section is mainly shown in the form of "一" , "十" , "T", groove type, tube type , constraint element are mainly single tube, double steel pipe steel pipe and, etc[5]. 2 Design of buckling restrained brace The axial buckling restrained brace stiffness and internal structure, the elastic modulus of steel core material and other factors, stiffness and axial stiffness and the number of support, setting angle of between layers lateral.
The calculation of ultimate bearing capacity of brb: (4) Where Ry is overstrength factor yield section steel core, for the Q235 steel, Ry=1.15, ω is the strain hardening coefficient, for the Q235 steel, ω=1.6, Fby is brb yield capacity.
(a)Compressive Buckling Behavior of ordinary support (b) Anti compression buckling stability behavior support Fig.6 Compression behavior of ordinary brace and brb (2) simpler Flexible structure design ①The brb can easily adjust the support stiffness by changing the core length support according to the strength of selection section, as a result ,the design more flexible. ②For the irregular plane structure, the stiffness center and the center of mass are often incon-sistent, the brb can be obtained better effect than the common support by adjusting the structure of the torsional stiffness. ③The brb can also give structure to provide adequate stiffness and damping, without the use of large support, the space utilization rate is higher. ④In the structure design, brb can be simplified as two force model, the constitutive relation of the bilinear model, mechanical model is more simple
(4) High reliability and maintainability Compared with the viscous damper and friction damper, BRB does not exist the problem of oil leakage, yield force depends on the steel material, will not be affected by the natural environment , so its performance is more stable and reliable. 5 Conclusions To sum up, the following conclusions can be drawn: (1) In the earthquake, the brb has good hysteretic performance, plump hysteretic curve, stability, energy dissipation capacity, the seismic performance of the structure
Online since: March 2022
Authors: Nor Ashikin Muhammad Khairussaleh, Gerald A.R. Parke, Ng Kah Hoe
Reducing certain volumes of concrete from 30 to 50% will affect the performance of the slab structure in particular the flexural and shear capacity.
This approves that the lack of a sufficient curing process will subsequently affect the compressive strength of the concrete.
Table 2: Correction Factor for Cylinder Specimen as given in ASTM C39 L/D Factor 1.75 0.98 1.50 0.96 1.25 0.93 1.00 0.87 Table 3: The Overall Results of Compressive Strength Test Characteristic Specimen 1 & 3 Average Ultimate Strength (N/mm2) 28.145 Average Correction Factor of L/D 0.942 Corrected Ultimate Strength (N/mm2) 26.521 Area Loading Test This study carried out the uniform distributed area loading test to obtain the flexural strength of both reinforced conventional solid slab (SS) and bubble deck slab (BD).
Thus, it is very critical for designers and engineers to recognise the mechanical properties of the structural member before it is being used in construction.
The low concrete content in the bubble deck slab, 33.19% less when compared with the solid slab, influenced the elasticity properties of the slab.
This approves that the lack of a sufficient curing process will subsequently affect the compressive strength of the concrete.
Table 2: Correction Factor for Cylinder Specimen as given in ASTM C39 L/D Factor 1.75 0.98 1.50 0.96 1.25 0.93 1.00 0.87 Table 3: The Overall Results of Compressive Strength Test Characteristic Specimen 1 & 3 Average Ultimate Strength (N/mm2) 28.145 Average Correction Factor of L/D 0.942 Corrected Ultimate Strength (N/mm2) 26.521 Area Loading Test This study carried out the uniform distributed area loading test to obtain the flexural strength of both reinforced conventional solid slab (SS) and bubble deck slab (BD).
Thus, it is very critical for designers and engineers to recognise the mechanical properties of the structural member before it is being used in construction.
The low concrete content in the bubble deck slab, 33.19% less when compared with the solid slab, influenced the elasticity properties of the slab.
Online since: June 2013
Authors: Fabrice Schmidt, Sawsane Nakouzi, Florentin Berthet, Yannick Le Maoult
Because of their good adhesive properties, superior mechanical, chemical and thermal properties, and resistance to fatigue and micro cracking, they produce high performance composites.
The fraction of radiative energy absorbed by the composite has been calculated via view factor computations thanks to the hemicube method [7].
For estimating the influence of IR radiation upon mechanical properties of the final composite piece, it would be important to achieve mechanical tests (DMA, 3-points bending, shear test …).
The fraction of radiative energy absorbed by the composite has been calculated via view factor computations thanks to the hemicube method [7].
For estimating the influence of IR radiation upon mechanical properties of the final composite piece, it would be important to achieve mechanical tests (DMA, 3-points bending, shear test …).