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Online since: January 2011
Authors: Yong Li Xu, Pei Feng Cheng, Guo Feng Liu, Ming Chen Lei
The performance of the mixture at low temperature was one of the most important factors to be considered to ensure its application in cold areas.
If increase the content of asphalt mixture, flexibility of the mixture rises and then show the same properties with hot mix asphalt (HMA).
Grading evaluation of recycling asphalt mixture Waste asphalt pavement can be recycled, but its performance is affected by factors of old milled material performance, the correct gradation designing and construction quality control.
The mixture milled need to be classified piled, evaluation content is mainly gradation , mechanical properties (crush value,acicular content), etc.
We can see that there are no significant difference for main properties between the three, and they all meet the requirements of the asphalt mixture lower layer, the emulsified asphalt milled mixture has the highest low-temperature bending tensile strain,but conventional asphalt mixture’s high temperature properties is best.
If increase the content of asphalt mixture, flexibility of the mixture rises and then show the same properties with hot mix asphalt (HMA).
Grading evaluation of recycling asphalt mixture Waste asphalt pavement can be recycled, but its performance is affected by factors of old milled material performance, the correct gradation designing and construction quality control.
The mixture milled need to be classified piled, evaluation content is mainly gradation , mechanical properties (crush value,acicular content), etc.
We can see that there are no significant difference for main properties between the three, and they all meet the requirements of the asphalt mixture lower layer, the emulsified asphalt milled mixture has the highest low-temperature bending tensile strain,but conventional asphalt mixture’s high temperature properties is best.
Online since: May 2016
Authors: Cong Ling Zhu, S. Li, J. Xu, C.H. Zhu
To design rubber dampers requires designers to know their characteristics very well, among which, static and dynamic behavior and characteristics are the key factors.
The technological level, production scale and product variety of rubber damper industry are dependent on users who often develop products that have similar shape but totally wrong structure or material properties as a result of insufficient knowledge.
He, Mechanical Property of Polymer, University of Science and Technology of China Press, Beijing, 2008
Lin, Vehicle System Dynamics, Mechanical Industry Press.
Lin, Vehicle system dynamics, Mechanical Industry Press, Beijing, 2005
The technological level, production scale and product variety of rubber damper industry are dependent on users who often develop products that have similar shape but totally wrong structure or material properties as a result of insufficient knowledge.
He, Mechanical Property of Polymer, University of Science and Technology of China Press, Beijing, 2008
Lin, Vehicle System Dynamics, Mechanical Industry Press.
Lin, Vehicle system dynamics, Mechanical Industry Press, Beijing, 2005
SPS Temperature Influence on the Composition, Structure and Magnetic Properties of Hematite Ceramics
Online since: September 2021
Authors: Alexander S. Samardak, Evgeniy Papynov, Alexey Ognev, Vladimir Pechnikov
The cumulative effect of these factors has a direct impact on the physicochemical characteristics of the sintered materials.
So, for example, in the case of the synthesis of magnetic materials, the change in their composition and structure, which easily occurs during heat treatment, is a critical factor determining their magnetic properties [23, 24] In addition, additional superposition of the electromagnetic field can affect the anisotropy of the system, setting the ordering of the magnetization during sintering.
Effect of SPS process sintering on the microstructure and mechanical properties of nanocrystalline TiC for tools application.
Magnetic properties of hard (CoFe2O4)-soft (Fe3O4) composite ceramics.
Influence of Crystallite Size on the Magnetic Properties of Acicular γ‐Fe2O3Particles.
So, for example, in the case of the synthesis of magnetic materials, the change in their composition and structure, which easily occurs during heat treatment, is a critical factor determining their magnetic properties [23, 24] In addition, additional superposition of the electromagnetic field can affect the anisotropy of the system, setting the ordering of the magnetization during sintering.
Effect of SPS process sintering on the microstructure and mechanical properties of nanocrystalline TiC for tools application.
Magnetic properties of hard (CoFe2O4)-soft (Fe3O4) composite ceramics.
Influence of Crystallite Size on the Magnetic Properties of Acicular γ‐Fe2O3Particles.
Online since: November 2012
Authors: Mohd Rizal Alkahari, Mohd Sanusi Abdul Aziz, Tatsuaki Furumoto, Ryutaro Tanaka, Akira Hosokawa, Takashi Ueda
One of the important properties in SLM is thermal conductivity of metal powder.
The part is a consolidated material where its mechanical properties and appearance are influenced by powder materials and fabrication parameters.
Thermal conductivity is important thermophysical properties for various design applications.
Therefore, in this paper, the thermal conductivity of metal powder and consolidated material and also factors that affects them are discussed.
[9] L.Taylor, Metals Handbook 1: Properties and Selection of Metals, 8th ed., American Society for Metals, Metals Park, Ohio, 1961.
The part is a consolidated material where its mechanical properties and appearance are influenced by powder materials and fabrication parameters.
Thermal conductivity is important thermophysical properties for various design applications.
Therefore, in this paper, the thermal conductivity of metal powder and consolidated material and also factors that affects them are discussed.
[9] L.Taylor, Metals Handbook 1: Properties and Selection of Metals, 8th ed., American Society for Metals, Metals Park, Ohio, 1961.
Online since: December 2010
Authors: Chang Qing Fang, Jing Bo Hu, Ying Zhang, Rui En Yu, Min Zhang
Resulting from the dual function of mechanical washing and surfactant, ink can be removed successfully.
Han Fu and his group selected domestic waste newspaper as object and researched 9 factors which affect deinking effect, including pulp content, repulping time, composite deinking agent, mass fraction of deinking agent, curing time, curing temperature, flotation concentration, flotation temperature and flotation time, optimizing the deinking technological condition, establishing a clear process which has an excellent deinking effect and reducing the cost, also the paper has high whiteness and yield rate [11].
Flotation cell is the core equipment of deinking production, so a large number of researches are about improving the structure and property of flotation cell.
Deinking agent should have properties[13]: (1) Contributes to easing and deinking waste paper, does not produce the re-adsorption after deinking and helps to remove the separated ink. (2) Reduces the carbon content of waste paper pulp, improves whiteness, removes carbon particle successfully along with bubbles during flotation decontamination. (3) Does not affect pulp yield rate and mechanical adaptability, plays a good role in wastewater treatment.
Secondary fiber is the dominant factor which affects deinking performance of waste paper recycling; therefore, it should be given full attention to produce high quality deinking agents and choose a suitable deinking technology [16].
Han Fu and his group selected domestic waste newspaper as object and researched 9 factors which affect deinking effect, including pulp content, repulping time, composite deinking agent, mass fraction of deinking agent, curing time, curing temperature, flotation concentration, flotation temperature and flotation time, optimizing the deinking technological condition, establishing a clear process which has an excellent deinking effect and reducing the cost, also the paper has high whiteness and yield rate [11].
Flotation cell is the core equipment of deinking production, so a large number of researches are about improving the structure and property of flotation cell.
Deinking agent should have properties[13]: (1) Contributes to easing and deinking waste paper, does not produce the re-adsorption after deinking and helps to remove the separated ink. (2) Reduces the carbon content of waste paper pulp, improves whiteness, removes carbon particle successfully along with bubbles during flotation decontamination. (3) Does not affect pulp yield rate and mechanical adaptability, plays a good role in wastewater treatment.
Secondary fiber is the dominant factor which affects deinking performance of waste paper recycling; therefore, it should be given full attention to produce high quality deinking agents and choose a suitable deinking technology [16].
Online since: November 2013
Authors: Ruo Chong Yang, Kai Li, Ji Peng Zhu, Shu Kai Ya, Dong Zheng
Results and Discussion
Mechanical Properties.
Different dosages of rubber powder volume may play a major impact on mechanical properties.
And the mechanical properties appeared a declining trend with the increase of rubber content.
Study on Gradation Composition Design of Cement-stabilized Macadam Considering Shrinkage Deformation Factors [J].
Research on the Physico-mechanical Properties and Durability of Crumb Rubber-modified Concrete[D].
Different dosages of rubber powder volume may play a major impact on mechanical properties.
And the mechanical properties appeared a declining trend with the increase of rubber content.
Study on Gradation Composition Design of Cement-stabilized Macadam Considering Shrinkage Deformation Factors [J].
Research on the Physico-mechanical Properties and Durability of Crumb Rubber-modified Concrete[D].
Online since: June 2012
Authors: Zhi Ming Yu, Fu Rong Shan, Yang Zhang, Meng Qi Wang
Ultrasonic dispersion was employed to take the place of traditional mechanical stir.
Coupling agent owns structures of the two properties: one part of the groups in molecular can react to the functional group on the surface of inorganic particles bonded with each other chemically tightly; the other part can react to organic polymer or wind it physically, which forms a special molecular bridge between inorganic particles and organic polymer[5-6].
Then the two materials with totally different property can be connected and the performance of composite is improved.
C(Al2O3) (wt%) pH KH550 (%) F (Hz) Rate (r/min) T (℃) Time (min) 1 5 10 1.0, 1.5, 2.0, 2.5, 3.0 40 300 70 50 2 5 10 2.5 40 300 70 10, 30, 50, 70, 90 3 5 10 2.5 40 300 70 50 The adding amount of the coupling agent is the key to affecting the modification effect.
Influence of silane coupling agents on surface properties of precipitated silica [J], Applied Surface Science, 2001,172(1-2): 18-32
Coupling agent owns structures of the two properties: one part of the groups in molecular can react to the functional group on the surface of inorganic particles bonded with each other chemically tightly; the other part can react to organic polymer or wind it physically, which forms a special molecular bridge between inorganic particles and organic polymer[5-6].
Then the two materials with totally different property can be connected and the performance of composite is improved.
C(Al2O3) (wt%) pH KH550 (%) F (Hz) Rate (r/min) T (℃) Time (min) 1 5 10 1.0, 1.5, 2.0, 2.5, 3.0 40 300 70 50 2 5 10 2.5 40 300 70 10, 30, 50, 70, 90 3 5 10 2.5 40 300 70 50 The adding amount of the coupling agent is the key to affecting the modification effect.
Influence of silane coupling agents on surface properties of precipitated silica [J], Applied Surface Science, 2001,172(1-2): 18-32
Online since: June 2013
Authors: Tukaram S. Sarkate
., Mechanical Engineering Babasaheb Naik College of Engineering, Pusad, Maharashtra, India
tukaramsarkate@gmail.com
Keywords: Helical Coil Compression Spring, Finite Element Analysis, CAE Tools, Shear Stress, Axial Deflection
Abstract.
In addition to the physical properties of its material, the wire diameter (d), loop diameter (D), number of loops (Na) and the distance between two consecutive loops (P) are the parameters that affect the behavior of spring.[3] The solid modeling of AISI 9255 helical coil spring is made in Pro-E Wildfire 5.0 software which is as shown in Fig.1.
Following are the input data that needs to be given to the preprocessor [1] Geometry and material properties The material properties of the spring under consideration are given in the table 1.
Spring is made up of material AISI 9255 with squares and grounded ends Table 1- Material Properties [4] Modulus of elasticity E 206E3 [MPa] Poisson’s ratio .28 Shear modulus G 78.45E3 [Mpa] The detail specifications of the spring are given in the table 2.
For the known value of yield stress the failure of the spring can be calculated and so the factor of safety.
In addition to the physical properties of its material, the wire diameter (d), loop diameter (D), number of loops (Na) and the distance between two consecutive loops (P) are the parameters that affect the behavior of spring.[3] The solid modeling of AISI 9255 helical coil spring is made in Pro-E Wildfire 5.0 software which is as shown in Fig.1.
Following are the input data that needs to be given to the preprocessor [1] Geometry and material properties The material properties of the spring under consideration are given in the table 1.
Spring is made up of material AISI 9255 with squares and grounded ends Table 1- Material Properties [4] Modulus of elasticity E 206E3 [MPa] Poisson’s ratio .28 Shear modulus G 78.45E3 [Mpa] The detail specifications of the spring are given in the table 2.
For the known value of yield stress the failure of the spring can be calculated and so the factor of safety.
Online since: February 2012
Authors: Jing Mao, De Mei Xu, Li Jun He
Introduction
Beryllium (Be) is one of the most attractive metals as structure materials due to its superior physical, thermal and mechanical properties, and it has been widely used in engineering domains such as nuclear energy systems and the propulsion systems of aviation and aerospace [1].
Such residual stress would have a strong influence on the mechanical properties of Be which is naturally brittle.
The specific factors were considered including CTE mismatch, temperature-related properties, the volume fraction, shape, size and distribution of second phase.
Material Properties for Modeling According to the actual process, initial and terminal temperatures were set at 1050 and 20 oC, respectively.
In such vast scale of changing temperature, the properties of materials are often dependent on the temperature.
Such residual stress would have a strong influence on the mechanical properties of Be which is naturally brittle.
The specific factors were considered including CTE mismatch, temperature-related properties, the volume fraction, shape, size and distribution of second phase.
Material Properties for Modeling According to the actual process, initial and terminal temperatures were set at 1050 and 20 oC, respectively.
In such vast scale of changing temperature, the properties of materials are often dependent on the temperature.
Online since: August 2011
Authors: Bang Chun Wen, Xing Guo Ma, Xiao Mei You, Lei Meng
According to mechanical theory,the theoretical output speed is 73.9845rad / s.
The conclusion above can be proven through the analysis on uneven factor of load-distribution in the literature [6].
So a main reason for affecting contact stress of gears is the random load torque caused by the road roughness.
The research method is the early exploration for seeking a new dynamic design method which is synthetically considered a number of performances of the gear system, such as the overall dynamic properties, strength and bearing capacity, etc.
[6] Yang Lu: China Mechanical Engineering.
The conclusion above can be proven through the analysis on uneven factor of load-distribution in the literature [6].
So a main reason for affecting contact stress of gears is the random load torque caused by the road roughness.
The research method is the early exploration for seeking a new dynamic design method which is synthetically considered a number of performances of the gear system, such as the overall dynamic properties, strength and bearing capacity, etc.
[6] Yang Lu: China Mechanical Engineering.