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Online since: April 2015
Authors: Mohd Mustafa Al Bakri Abdullah, Mien Van Tran, Dong Viet Phuong Tran
Materials and Methods
Cylindrical concrete specimens 150mm in diameter and 300mm in height were cast, in the middle of each specimens was embedded a steel bar (D=14mm and L=300mm). aggregates were used to cast, which were washed totally and determined mechanical characteristics.
While other factors were held constantly, chloride concentration decreased to 30 – 45% while increasing concentration of electrolyte; additionally, when the current density was increased, chloride concentration decreased to 45 – 60%.
However, this study showed that when the thinness of concrete was held constantly and increasing dense concrete or reducing water/cement ratio, that also affects chloride concentration extraction.
Rehabilitation efficiency of ECE treatment is affected by many factors, especially the current density and quality of the concrete layer.
Wang, "Change of electrochemical property of reinforced concrete after electrochemical chloride extraction," Journal of Wuhan University of Technology - Materials Science, vol. 22, pp. 764-769. [6] U.
While other factors were held constantly, chloride concentration decreased to 30 – 45% while increasing concentration of electrolyte; additionally, when the current density was increased, chloride concentration decreased to 45 – 60%.
However, this study showed that when the thinness of concrete was held constantly and increasing dense concrete or reducing water/cement ratio, that also affects chloride concentration extraction.
Rehabilitation efficiency of ECE treatment is affected by many factors, especially the current density and quality of the concrete layer.
Wang, "Change of electrochemical property of reinforced concrete after electrochemical chloride extraction," Journal of Wuhan University of Technology - Materials Science, vol. 22, pp. 764-769. [6] U.
Online since: February 2018
Authors: Giuseppe Brando, Gianfranco de Matteis
In order to bridge this gap, the current paper provides some analytical laws that, owing to the required shear demand, allow to give back the hysteretic cycle as a function of the most influencing geometrical properties, according to the panel typology.
The considered models allowed to highlight how the real stress distribution was affected by the hole arrangement and to justify the detrimental phenomena due to the trigger of some undesired parasitic instabilities previously recalled.
Influential Geometrical Parameters The parametric experimental and numerical studies carried out on the two panel typologies put in evidence that, established the fundamental mechanical features, their hysteretic performance can be expressed as a function of specific geometrical properties of the panels.
a) b) Fig. 7: a) The hysteretic model based on the proposed formulation; (b) Influence of pinching effects on the hysteretic models Apart from the performance parameters τpinc/τmax and τy/τmax that can be obtained by the graph and the formulations provided previously, the given expression depends on two further factors n0 and n1 that have been introduced for calibrating the panels performance on the basis of the real experimental (and numerical) response of the panels.
These factors depends on the ratio b/t and D/s for the multi-stiffened and the perforated typologies, respectively, as it is shown in Figures 8.
The considered models allowed to highlight how the real stress distribution was affected by the hole arrangement and to justify the detrimental phenomena due to the trigger of some undesired parasitic instabilities previously recalled.
Influential Geometrical Parameters The parametric experimental and numerical studies carried out on the two panel typologies put in evidence that, established the fundamental mechanical features, their hysteretic performance can be expressed as a function of specific geometrical properties of the panels.
a) b) Fig. 7: a) The hysteretic model based on the proposed formulation; (b) Influence of pinching effects on the hysteretic models Apart from the performance parameters τpinc/τmax and τy/τmax that can be obtained by the graph and the formulations provided previously, the given expression depends on two further factors n0 and n1 that have been introduced for calibrating the panels performance on the basis of the real experimental (and numerical) response of the panels.
These factors depends on the ratio b/t and D/s for the multi-stiffened and the perforated typologies, respectively, as it is shown in Figures 8.
Online since: February 2026
Authors: Ojong Elias Ojong, Odey David Adoga, Uloma Catherine Anaba, Silas Shamaye Samuel, Raymond Rowland Ana, Odey Ade Osha
The factors with VIF equals 1 indicated that there is no correlation among the variables or factors and VIF greater than 1 means there is correlation among the factors.
But from the two factors, the one that affect the capturing most is the bed height, as higher bed height leads to more capturing of the gas and vice versa.
These factors affect the adsorption process greatly as maximum adsorption of 85% and 80% CO2 from mixture of gas occurs at 1.4 (hrs.) to 3.2 (hrs.) and 91 O C to 130 O C respectively.
The degree of performance of these parameters affecting removal of pollutant process, is in the order of time & temperature > time & bed height > temperature and bed height, as the combination of these factors gave maximum percentage adsorption of CO2 of 85% & 80% > 85% & 79% > 79% & 79%, and minimum values of 68% & 38% < 68% & 48% > 58% & 56% respectively.
Statistical optimization and design of the adsorption process showed that quadratic model is suitable for the process, with bed height, temperature, time and their interactions as main factors affecting the adsorption process.
But from the two factors, the one that affect the capturing most is the bed height, as higher bed height leads to more capturing of the gas and vice versa.
These factors affect the adsorption process greatly as maximum adsorption of 85% and 80% CO2 from mixture of gas occurs at 1.4 (hrs.) to 3.2 (hrs.) and 91 O C to 130 O C respectively.
The degree of performance of these parameters affecting removal of pollutant process, is in the order of time & temperature > time & bed height > temperature and bed height, as the combination of these factors gave maximum percentage adsorption of CO2 of 85% & 80% > 85% & 79% > 79% & 79%, and minimum values of 68% & 38% < 68% & 48% > 58% & 56% respectively.
Statistical optimization and design of the adsorption process showed that quadratic model is suitable for the process, with bed height, temperature, time and their interactions as main factors affecting the adsorption process.
Online since: September 2014
Authors: Guo Quan Zhang, Ning Zhang, Yan Hua Shi, Zhi Ping Huang
Screw Conveyor Design and Discrete Element Simulation Analysis of the Rice Mill
Yanhua Shi1,a, Guoquan Zhang1,b,*, Ning Zhang2,c, Huang Zhiping3,d
1College of Mechanical and Electrical Engineering of Wuhan Polytechnic University, Wuhan, 430023, China
2Mechanical and Electrical Engineering College of Inner Mongolia Agricultural University, Hohhot, 010018, China
3Zhensheng Technology Co., Ltd. of Guangdong, Meizhou 514700, China
ashiyanhua122@163.com, bgquanzh@sina.com, clyuzhangning@163.com, d448104691@qq.com
Keywords: rice mill; screw conveyor; discrete element; simulation analysis
Abstract.
Overall program to determine On the milled white room cross-section of the rice mill, the fluid density of the rice grains is uniform, during the course of the campaign, the probability is less affected by bending and shear, and the broken rice rate is low, loved by the users.
Fig.2 The discrete element of analysis model Fig.3 The model of granular materials Set granular material, because of brown smooth surface, good liquidity, it can be defined as the ellipsoid approximation granular body [8], in discrete element analysis process will be simplified as brown granules hard sphere model, design and composition of 11 balls , based on the grain weight 25g, the appearance of brown particles shown in Figure 3, Specific properties of the particulate material are shown in Tab.1.
Physical properties of the particles is defined, the physical properties of materials is a major factor in the simulation results to ensure the accuracy of the parameters of the microscopic portion of the material is particularly critical for the simulation, the specific properties of the contact as shown in Tab.2 [9].
Tab.1 The Material Properties Table Material Poisson's ratio Shear modulus(Pa) Density(kg/m3) rice 0.3 2.3e+07 1670 steel 0.3 1e+10 7850 Tab.2 The Contacting the property sheet Interaction Recovery coefficient Static friction coefficient Coefficient dynamic friction rice—rice 0.1 0.6 0.01 rice—steel 0.3 0.5 0.01 simulation analysis, set the drive motor driven roller mill speed 1104.48r/min, to establish the total amount of grain produced particles is not restricted factories, can produce 5,000 per set rice, the running time of 3s, (which 1.5 seconds before the time for the grain filling species, as the spindle drive after 1.5s sand roller blade starts to rotate and rice), rice generated automatically numbered according to the order, select one of several rice mark, simulation analysis.
Overall program to determine On the milled white room cross-section of the rice mill, the fluid density of the rice grains is uniform, during the course of the campaign, the probability is less affected by bending and shear, and the broken rice rate is low, loved by the users.
Fig.2 The discrete element of analysis model Fig.3 The model of granular materials Set granular material, because of brown smooth surface, good liquidity, it can be defined as the ellipsoid approximation granular body [8], in discrete element analysis process will be simplified as brown granules hard sphere model, design and composition of 11 balls , based on the grain weight 25g, the appearance of brown particles shown in Figure 3, Specific properties of the particulate material are shown in Tab.1.
Physical properties of the particles is defined, the physical properties of materials is a major factor in the simulation results to ensure the accuracy of the parameters of the microscopic portion of the material is particularly critical for the simulation, the specific properties of the contact as shown in Tab.2 [9].
Tab.1 The Material Properties Table Material Poisson's ratio Shear modulus(Pa) Density(kg/m3) rice 0.3 2.3e+07 1670 steel 0.3 1e+10 7850 Tab.2 The Contacting the property sheet Interaction Recovery coefficient Static friction coefficient Coefficient dynamic friction rice—rice 0.1 0.6 0.01 rice—steel 0.3 0.5 0.01 simulation analysis, set the drive motor driven roller mill speed 1104.48r/min, to establish the total amount of grain produced particles is not restricted factories, can produce 5,000 per set rice, the running time of 3s, (which 1.5 seconds before the time for the grain filling species, as the spindle drive after 1.5s sand roller blade starts to rotate and rice), rice generated automatically numbered according to the order, select one of several rice mark, simulation analysis.
Online since: October 2023
Authors: Marcello Fera, Piera Maresca, Pasquale Manco, Alessandro Greco, Salvatore Gerbino
Specifically, it was demonstrated that build direction can affect various aspects of process performance such as production time, costs and product quality and functional properties [2].
Furthermore, surface quality, as well as mechanical properties, are process parameter-dependent.
Control factors and corresponding levels.
Whereas no factors are statistically significant for T.
Kok et al., Anisotropy and heterogeneity of microstructure and mechanical properties in metal additive manufacturing: A critical review, Mater.
Furthermore, surface quality, as well as mechanical properties, are process parameter-dependent.
Control factors and corresponding levels.
Whereas no factors are statistically significant for T.
Kok et al., Anisotropy and heterogeneity of microstructure and mechanical properties in metal additive manufacturing: A critical review, Mater.
Online since: March 2017
Authors: Manish Kumar, Franz Renz, Daniel Unruh, Ralf Sindelar
And to gain the magnetic properties MagSilica® is incorporated.
The processing tools to produce magnetic fibers are described and their magnetic properties are investigated.
It is considered that other factors such as solution electrical conductivity and viscosity should be changed with the addition of MNPs, which affected the fiber diameter significantly.
Delgado, Tegafur loading and release properties of magnetite/poly(alkylcyanoacrylate) (core/shell) nanoparticles, J.
Kim, Potential of magnetic nanofiber scaffolds with mechanical and biological properties applicable for bone regeneration, PLoS One. 9 (2014) e91584
The processing tools to produce magnetic fibers are described and their magnetic properties are investigated.
It is considered that other factors such as solution electrical conductivity and viscosity should be changed with the addition of MNPs, which affected the fiber diameter significantly.
Delgado, Tegafur loading and release properties of magnetite/poly(alkylcyanoacrylate) (core/shell) nanoparticles, J.
Kim, Potential of magnetic nanofiber scaffolds with mechanical and biological properties applicable for bone regeneration, PLoS One. 9 (2014) e91584
Online since: August 2018
Authors: ali fahem, Shaymaa Abdul Khader Al-Jumaili, A.M. Al-Mukhtar
Effect of welding current on tensile shear strength
Effect of Annealing Treatment
The annealing improves the mechanical properties.
Conclusions Mechanical properties and quality of spot weldments improve by increasing the welding current.
Demir, “Effect of welding current on mechanical properties of galvanized chromided steel sheets in electrical resistance spot welding,” Mater.
Al-Jumaili, “Mechanical Properties Investigation of Multi-Lap Stainless Steel Sheets,” J.
Aslanlar, “The effect of nucleus size on mechanical properties in electrical resistance spot welding of sheets used in automotive industry,” Mater.
Conclusions Mechanical properties and quality of spot weldments improve by increasing the welding current.
Demir, “Effect of welding current on mechanical properties of galvanized chromided steel sheets in electrical resistance spot welding,” Mater.
Al-Jumaili, “Mechanical Properties Investigation of Multi-Lap Stainless Steel Sheets,” J.
Aslanlar, “The effect of nucleus size on mechanical properties in electrical resistance spot welding of sheets used in automotive industry,” Mater.
Online since: October 2011
Authors: De Jun Lan, Min Zou, Xue Ping Luo, Shuang Hua Huang, Qi Lai
However, several factors limit the utilities of titanium coatings.
And influence of crystal system, nucleation density and adhesiveness properties of Ti films are characterized.
Thereby the density was affected.
Amon, "Investigation of interface properties of Ti/Ni/Ag thin films on Si substrate," Vacuum, vol. 82, pp. 162-165, 2007
Teng, "Effect of temperature on residual stress and mechanical properties of Ti films prepared by both ion implantation and ion beam assisted deposition," Applied Surface Science, vol. 255, pp. 4484-4490, 2009
And influence of crystal system, nucleation density and adhesiveness properties of Ti films are characterized.
Thereby the density was affected.
Amon, "Investigation of interface properties of Ti/Ni/Ag thin films on Si substrate," Vacuum, vol. 82, pp. 162-165, 2007
Teng, "Effect of temperature on residual stress and mechanical properties of Ti films prepared by both ion implantation and ion beam assisted deposition," Applied Surface Science, vol. 255, pp. 4484-4490, 2009
Online since: January 2013
Authors: Wei Xu, Li Jing Gao, Feng Jiang, Guo Min Xiao
The effects of the properties of the slurry were investigated on the γ-Al2O3 coating.
Such properties of the coating slurry as solid content and density of the aluminum sol were investigated on the loading of γ-Al2O3.
Results and Discussion Effect of slurry properties on γ-Al2O3 coating.
Thus, a L9 (33) orthogonal experiment was designed based on the other three factors.
The factors and levels advised were shown in Table 2.
Such properties of the coating slurry as solid content and density of the aluminum sol were investigated on the loading of γ-Al2O3.
Results and Discussion Effect of slurry properties on γ-Al2O3 coating.
Thus, a L9 (33) orthogonal experiment was designed based on the other three factors.
The factors and levels advised were shown in Table 2.
Online since: April 2021
Authors: Gennady A. Sukhochev, Vasiliy N. Sokolnikov, Andrey M. Nekrylov
Rz=DRz-Va·t
(6)
where Rz is height of roughness after mechanical hardening.
Obvious that a film thickness depends on many ignored factors, that is why the obtained values should be considered as average once, though their adaptation for calculation of machining modes is substantially enough.
Maximum residual compressive stresses [18]: (13) where К6 is coefficient taking into account ratio of modules of elasticity for the part and specimen materials; К7 is coefficient of reduction which equals to ratio of flexures of specimens made of the part and test specimen materials; К8 is differentiable coefficient taking into account vibration of geometry, roughness and mechanical properties of the part and specimens materials.
The combined machining permits to increase quality factors of material surface used for parts with ducts of complicated configuration.
Pokhmursky, Investigation of hydrogen influence on metals in Kar-penko physico–mechanical institute, Phys.
Obvious that a film thickness depends on many ignored factors, that is why the obtained values should be considered as average once, though their adaptation for calculation of machining modes is substantially enough.
Maximum residual compressive stresses [18]: (13) where К6 is coefficient taking into account ratio of modules of elasticity for the part and specimen materials; К7 is coefficient of reduction which equals to ratio of flexures of specimens made of the part and test specimen materials; К8 is differentiable coefficient taking into account vibration of geometry, roughness and mechanical properties of the part and specimens materials.
The combined machining permits to increase quality factors of material surface used for parts with ducts of complicated configuration.
Pokhmursky, Investigation of hydrogen influence on metals in Kar-penko physico–mechanical institute, Phys.