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Online since: July 2014
Authors: Tong Wei, Xiao Jing Feng, Zhong Yi Zuo
This paper reviews the various influencing factors of the pressure distribution and also summarizes its simulation and prediction methods based on the sufficiently literature reading.
Granular goods of sand, gravel, crushed coal, cement and other powdered goods known as bulk whose physical properties were state between solids and liquids, were consist of the objects with relatively homogeneous particle.
Influence Factors Many studies showed that the pressure exert on compartment by bulk goods was mainly influenced by following factors: Physical and Mechanical Properties Shear Strength.
At present, the impact brought by this factor was considered by a vibrating densification coefficient. [1] Creep Property.
Besides FEM, the mechanical behavior of bulk is also studied through DEM(Discrete Element Method) by researchers from aviation, silo, railway and other fields.[1,14,15] Conclusions Above all, there are many factors influence the pressure of the sidewall of bulk carriage, and these factors will interact with each other, therefore the predication of the variable pressure is a rather complex scientific problem.
Granular goods of sand, gravel, crushed coal, cement and other powdered goods known as bulk whose physical properties were state between solids and liquids, were consist of the objects with relatively homogeneous particle.
Influence Factors Many studies showed that the pressure exert on compartment by bulk goods was mainly influenced by following factors: Physical and Mechanical Properties Shear Strength.
At present, the impact brought by this factor was considered by a vibrating densification coefficient. [1] Creep Property.
Besides FEM, the mechanical behavior of bulk is also studied through DEM(Discrete Element Method) by researchers from aviation, silo, railway and other fields.[1,14,15] Conclusions Above all, there are many factors influence the pressure of the sidewall of bulk carriage, and these factors will interact with each other, therefore the predication of the variable pressure is a rather complex scientific problem.
Online since: February 2024
Authors: Nabil Bensaid, Mohamed Farid Benlamnouar, Mosbah Zidani, Tahar Saadi, Riad Badji, Mohammed Oubelkacem Azzoug
The ANOVA method was used to evaluate the influence of varying factors on the overall quality of welds.
However, the addition of elemental powder produced more equiaxed and refined grains than the cryogenic cooling, but the latter provided a best combination of mechanical properties.
The study has a specific focus on grain refinement and its effects on the mechanical, metallurgical, and electrochemical properties of welds.
Reddy, Influence of grain refining elements on mechanical properties of AISI 430 ferritic stainless steel weldments - Taguchi approach, Materials and Design 36 (2012) 443-450
Gankidi, Effect of copper and aluminum addition on mechanical properties and corrosion behaviour of AISI 430 ferritic stainless steel gas tungsten arc welds.
However, the addition of elemental powder produced more equiaxed and refined grains than the cryogenic cooling, but the latter provided a best combination of mechanical properties.
The study has a specific focus on grain refinement and its effects on the mechanical, metallurgical, and electrochemical properties of welds.
Reddy, Influence of grain refining elements on mechanical properties of AISI 430 ferritic stainless steel weldments - Taguchi approach, Materials and Design 36 (2012) 443-450
Gankidi, Effect of copper and aluminum addition on mechanical properties and corrosion behaviour of AISI 430 ferritic stainless steel gas tungsten arc welds.
Online since: December 2014
Authors: Mona F. Ali, Rushdya Rabee, Abdel Gawaad Ali Fahmy, Sawsan Fakhry Halim
This research aims to find a way to protect archeological leather from damage by environmental factors, without losing their archaeological appearance.
The mechanical properties of treated samples were enhanced with reduction in the ΔE values.
In general, polymer used to reinforce artifacts, whether natural or synthetic polymer should play its role in restoration without affecting the structure or the antique appearance.
The mechanical properties were tested for samples to estimate the suitable time for the treatment with SBR solutions.
The deterioration in the mechanical properties by ageing for untreated samples was assessed every three days. it was found that the upmost deterioration of the samples mechanical properties were at 12 days, followed by minor decreases up to 18 days.
The mechanical properties of treated samples were enhanced with reduction in the ΔE values.
In general, polymer used to reinforce artifacts, whether natural or synthetic polymer should play its role in restoration without affecting the structure or the antique appearance.
The mechanical properties were tested for samples to estimate the suitable time for the treatment with SBR solutions.
The deterioration in the mechanical properties by ageing for untreated samples was assessed every three days. it was found that the upmost deterioration of the samples mechanical properties were at 12 days, followed by minor decreases up to 18 days.
Online since: January 2015
Authors: Robert Ulewicz
There were used following criteria in order to characterize the quality (usability): corrosion resistance, mechanical properties, physical properties, gloss, roughness, and economical criteria.
In the analyzed case we take into account the following criteria: corrosion resistance, mechanical properties, physical properties, gloss, roughness and economic criterion [1-5].
Procedure and experimental material When analysing influence of many factors on properties of being designed detail we encounter difficulties in their assessment since they are the kind of quantities which are in general incomparable and uncountable with each other.
Chemical composition and mechanical properties S235JRG2 steel Chemical composition [%] C Mn Si P S Cr Ni Cu 0.17 0.51 0.17 0.013 0.013 0.03 0.04 0.06 Mechanical properties Re [MPa] Rm [MPa] A5 [%] 340.0 445.6 30.8 Fig.2.
Selejdak, Influencing Factors onto Quality of Welded Pipes, Metalurgija, 42/1(2003) 65-67
In the analyzed case we take into account the following criteria: corrosion resistance, mechanical properties, physical properties, gloss, roughness and economic criterion [1-5].
Procedure and experimental material When analysing influence of many factors on properties of being designed detail we encounter difficulties in their assessment since they are the kind of quantities which are in general incomparable and uncountable with each other.
Chemical composition and mechanical properties S235JRG2 steel Chemical composition [%] C Mn Si P S Cr Ni Cu 0.17 0.51 0.17 0.013 0.013 0.03 0.04 0.06 Mechanical properties Re [MPa] Rm [MPa] A5 [%] 340.0 445.6 30.8 Fig.2.
Selejdak, Influencing Factors onto Quality of Welded Pipes, Metalurgija, 42/1(2003) 65-67
Online since: October 2013
Authors: Dan Ying Gao, Yu Yang Pang, Pu Zhang, Jian Song Yuan, Fei Mo
Rib depth with different rib form is also the key factors affecting the bonding between concrete.
Through research on several different rib surface form and deep tensile properties of GFRP bar materials, different rib depth effect on the tensile properties of GFRP bar material was got.
Wang, Study of GFRP Bar's Mechanical Properties in Compression, Journal of Shenyang Jianzhu University, Vol. 27 6 (2011) 1037-1042
[8] GB/T13096.1-91, Test Method for Tensile Properties of Glass Fiber Reinforced Plastic Rod, China Building Industry Press, Beijing, 1991
Li, The research of method and design parameters of mechanical properties tests.
Through research on several different rib surface form and deep tensile properties of GFRP bar materials, different rib depth effect on the tensile properties of GFRP bar material was got.
Wang, Study of GFRP Bar's Mechanical Properties in Compression, Journal of Shenyang Jianzhu University, Vol. 27 6 (2011) 1037-1042
[8] GB/T13096.1-91, Test Method for Tensile Properties of Glass Fiber Reinforced Plastic Rod, China Building Industry Press, Beijing, 1991
Li, The research of method and design parameters of mechanical properties tests.
Online since: February 2015
Authors: Francisco Antonio Rocco Lahr, André Luis Christoforo, Rodrigo B. Canto, Francisco Augusto Zago Marques, Carlos Eduardo G. da Silva, Túlio Hallak Panzera
The clusters of NTC hinder the mechanical properties of the composites.
A P-value equal or lower than 0.05 implies rejecting H0, which reveals the factor significantly affect the response.
PHYSICAL AND MECHANICAL PROPERTIES OF THE COMPOSITES.
TUKEY TEST FOR THE PHYSICAL AND MECHANICAL PROPERTIES OF THE COMPOSITES.
The use of 60% of cement implies in the reduction of the mechanical properties.
A P-value equal or lower than 0.05 implies rejecting H0, which reveals the factor significantly affect the response.
PHYSICAL AND MECHANICAL PROPERTIES OF THE COMPOSITES.
TUKEY TEST FOR THE PHYSICAL AND MECHANICAL PROPERTIES OF THE COMPOSITES.
The use of 60% of cement implies in the reduction of the mechanical properties.
Online since: August 2023
Authors: Zolfa Q. Atshan, Muhanned A. Mohammed
Studying the Factors Affecting De-Emulsification of Crude Oil
Zolfa.
There are many methods of de-emulsifying, including physical (thermal, mechanical, and electrical), chemical, and microbiological, but the chemical method remains the most widely used and commons method (4).
To our knowledge, no research on the water-oil separation model has been published that takes into account droplet dynamic properties with the coupling effect of chemical and centrifugal.
Table (2.1): Physical properties of crude oil Property Basrah crude oil Density at 30° C 0.878 API 29.5 Salt content (%wt) 0.0021 Asphaltene (%wt) 2 Water and Sediment content(%vol) 0.05 Kinematic Viscosity (Cst) at 30° C 22.7 Sulfur content %wt 3.3785 2.2.
Effect of Demulsifier Properties on Destabilization of Water-in-Oil Emulsion.
There are many methods of de-emulsifying, including physical (thermal, mechanical, and electrical), chemical, and microbiological, but the chemical method remains the most widely used and commons method (4).
To our knowledge, no research on the water-oil separation model has been published that takes into account droplet dynamic properties with the coupling effect of chemical and centrifugal.
Table (2.1): Physical properties of crude oil Property Basrah crude oil Density at 30° C 0.878 API 29.5 Salt content (%wt) 0.0021 Asphaltene (%wt) 2 Water and Sediment content(%vol) 0.05 Kinematic Viscosity (Cst) at 30° C 22.7 Sulfur content %wt 3.3785 2.2.
Effect of Demulsifier Properties on Destabilization of Water-in-Oil Emulsion.
Online since: February 2011
Authors: Yi Bing Zhang, Ying Ying Zhang
The nonlinearity of material properties at different temperatures and the manner of braking force applying on a brake system are two key factors to affect the coupling of temperature and thermal stress.
Considering these two factors, a finite element analysis model of automobile brake disc and pad is established.
From Eq. 1 we can see that the elastic matrix (elastic modulus) of a brake pair is the major factor which affects the contact stress distribution of a single stress field.
Under a specific structure and working conditions, the contact stress is a direct cause of affecting the heat flux density.
Material properties Material properties of brake pad Material properties of brake disc Temperature[] 20 100 200 300 Modulus of Elasticity [GPa] 22 13 5.3 3.2 120 Thermal Expansion Coefficient [-1] 1×10-5 3×10-5 1.1×10-5 Density[kg/m3] 3960 7350 Heat conduction coefficient[W/m·] 4.8 48 Specific heat capacity[J/kg·] 600 710 Poisson ratio 0.25 0.3 Finite Element Model and Boundary Conditions.
Considering these two factors, a finite element analysis model of automobile brake disc and pad is established.
From Eq. 1 we can see that the elastic matrix (elastic modulus) of a brake pair is the major factor which affects the contact stress distribution of a single stress field.
Under a specific structure and working conditions, the contact stress is a direct cause of affecting the heat flux density.
Material properties Material properties of brake pad Material properties of brake disc Temperature[] 20 100 200 300 Modulus of Elasticity [GPa] 22 13 5.3 3.2 120 Thermal Expansion Coefficient [-1] 1×10-5 3×10-5 1.1×10-5 Density[kg/m3] 3960 7350 Heat conduction coefficient[W/m·] 4.8 48 Specific heat capacity[J/kg·] 600 710 Poisson ratio 0.25 0.3 Finite Element Model and Boundary Conditions.
Online since: January 2014
Authors: Guang Xu, Min Wang, Hai Lin Yang, Ming Xing Zhou, Yi Zhang
The objective of the study is to examine the factors affecting yield strength and the effect of processing temperatures on microstructure and precipitation.
The research results indicate that the dominant factors responsible for yield strength are fine ferrite grains and fine-scale carbonitride precipitatates, which are affected by processing temperatures.
The influence factors of microalloying elements on microstructure and precipitation were investigated.
Najafizadeh: Effect of niobium and rolling parameters on the mechanical properties and microstructure of dual phase steels, Mater.
Vrchovinsky: Effect of thermomechanical processing on the microstructure and mechanical properties of Nb–Ti microalloyed steel, Mater.
The research results indicate that the dominant factors responsible for yield strength are fine ferrite grains and fine-scale carbonitride precipitatates, which are affected by processing temperatures.
The influence factors of microalloying elements on microstructure and precipitation were investigated.
Najafizadeh: Effect of niobium and rolling parameters on the mechanical properties and microstructure of dual phase steels, Mater.
Vrchovinsky: Effect of thermomechanical processing on the microstructure and mechanical properties of Nb–Ti microalloyed steel, Mater.
Online since: November 2012
Authors: Konrad J. Waluś, Zbigniew Olszewski
Effects of Atmospheric Conditions on The Mechanical Properties of Tires
Zbigniew Olszewski1, Konrad J.
External factors affect the area of wheel contact with the ground in two ways - by changing the surface properties and acting on the mechanical properties of the tire itself.
Rubber from which tires are produced is a material with viscoelastic properties so that they have the capacity to absorb vibration and strain, converting mechanical energy to heat in the processes related to internal friction.
The change in temperature of the material leads to changes in its mechanical properties such as hardness.
Its value depends on many factors associated with both the material properties of the friction pair components, as well as external factors such as temperature or presence of impurities on the surface.
External factors affect the area of wheel contact with the ground in two ways - by changing the surface properties and acting on the mechanical properties of the tire itself.
Rubber from which tires are produced is a material with viscoelastic properties so that they have the capacity to absorb vibration and strain, converting mechanical energy to heat in the processes related to internal friction.
The change in temperature of the material leads to changes in its mechanical properties such as hardness.
Its value depends on many factors associated with both the material properties of the friction pair components, as well as external factors such as temperature or presence of impurities on the surface.