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Online since: August 2025
Authors: Ahmed Suliman B. Ali, Shaban Ismael Albrka Ali, Allam Musbah Al Allam
Clay modification, using nanoclays significantly changes asphalt binder chemical and mechanical properties [15, 16].
Moisture damage and aging are the most significant factors to the deterioration of asphalt mixture [22].The research strongly supports the idea of SFE is a key factor influencing moisture damage resistance by components of both the asphalt binder and the aggregate.
It’s important to consider that the observed characteristics in the SEM images can vary based on several factors.
[27] Ali, A.S.B., et al., Chemical properties of peat micro particles modified asphalt.
[30] Yusra, A., et al., The Study of Mechanical Properties and Chemical Groups of Composite Concrete.
Moisture damage and aging are the most significant factors to the deterioration of asphalt mixture [22].The research strongly supports the idea of SFE is a key factor influencing moisture damage resistance by components of both the asphalt binder and the aggregate.
It’s important to consider that the observed characteristics in the SEM images can vary based on several factors.
[27] Ali, A.S.B., et al., Chemical properties of peat micro particles modified asphalt.
[30] Yusra, A., et al., The Study of Mechanical Properties and Chemical Groups of Composite Concrete.
Online since: December 2011
Authors: Zeng Zhi Zhang, Gui Quan Han
An Research on Self-fused Alloy Coating by High Frequency Induction Treatment
Guiquan Han1,2,a, Zengzhi Zhang2,b
1School of Chemical Engineering, Huaihai Institute of Technology, Lianyungang,
Jiangsu, P.R.China, 222005
2School of Mechanical Electronic & Information Engineeringes, China University of Mining & Technology, Beijing, P.R.China, 100083
a20082008hgq@163.com, bzzzbeijing@163.com
Keywords: Alloy coating, High frequency induction
Abstract.
Comparing the microstructures and the properties of the coatings by cold adhesion, thermal spraying and laser refusing, we may conclude that: (1) One side of the workpiece should be preheated to 200℃ before induction, and the range of frequency induction should be selected as 200~250kHz. (2) The microstructure of the coating by cold adhesion is superior to that by thermal spraying, but the particle size range should be 0.047~0.044mm (200~320 meshes). (3) The corrosion resistance of Ni60 coating by cold adhesion is better than by thermal spraying, and the cold adhesion is the best way to prepare the wear resistant coating.
As there are many factors affecting heating power density, the following measures are employed to fulfill the exact control of the workpiece, proper technological parameters are selected in accordance with different substrates, different alloy powder, different diameters, and different thickness of the coatings.
Comparing the microstructures and the properties of the coatings by cold adhesion, thermal spraying and laser refusing, we may conclude that: (1) One side of the workpiece should be preheated to 200℃ before induction, and the range of frequency induction should be selected as 200~250kHz. (2) The microstructure of the coating by cold adhesion is superior to that by thermal spraying, but the particle size range should be 0.047~0.044mm (200~320 meshes). (3) The corrosion resistance of Ni60 coating by cold adhesion is better than by thermal spraying, and the cold adhesion is the best way to prepare the wear resistant coating.
As there are many factors affecting heating power density, the following measures are employed to fulfill the exact control of the workpiece, proper technological parameters are selected in accordance with different substrates, different alloy powder, different diameters, and different thickness of the coatings.
Online since: August 2013
Authors: Feng Gao, Jie Liu, Guo Yan Xu
Because the running gear is not affect by any force except gravity force, ignoring adhesive force related to terramechanics.
The relative position between pneumatic tire and clamping mechanism is the vital factor of clamping [7].
In the first, compliance matrix for pneumatic tire clamped by linkage mechanism is deduced depending on the contact forces, material properties and local geometry of contacting surface.
Journal of Mechanical Engineering. 48( 2012) 73-86
Mechanical and geometric advantages in compliant mechanism optimization.
The relative position between pneumatic tire and clamping mechanism is the vital factor of clamping [7].
In the first, compliance matrix for pneumatic tire clamped by linkage mechanism is deduced depending on the contact forces, material properties and local geometry of contacting surface.
Journal of Mechanical Engineering. 48( 2012) 73-86
Mechanical and geometric advantages in compliant mechanism optimization.
Online since: September 2013
Authors: Laura Vergani, Chiara Colombo, Giorgia Gobbi
The possible causes are identified in a particular combination of material properties and operative variables connected to the flange use.
Mechanical properties of this material are obtained from experimental tensile tests carried out on specimens of Incoloy 825, with 150HB.
Table 2: Mechanical properties of Incoloy 825, for different hardness.
FE model is able to estimate an eventual flange damage and its sealing properties.
Presence of the impression can induce a reduction in sealing properties of the joints.
Mechanical properties of this material are obtained from experimental tensile tests carried out on specimens of Incoloy 825, with 150HB.
Table 2: Mechanical properties of Incoloy 825, for different hardness.
FE model is able to estimate an eventual flange damage and its sealing properties.
Presence of the impression can induce a reduction in sealing properties of the joints.
Online since: February 2012
Authors: Xian Hui Sun, Lin Tong Wang, Yong Sheng Ma, Zeng Liu, Yun Fa Chen
The main influence factors on retention effect, such as dosage of polymethyl acrylate emulsion, pH value of the bleached wheat straw pulp, reaction time after adding the polymethyl acrylate emulsion and stir velocity were discussed in detail.
Usually retention aid in the slurry is pointing to join retention aid agent through the colloid adsorption and mechanical intercept role to improve tiny fiber, packing in the online micro-sized particles with, this process tiny fiber, retention aid agent of the composition such as performance (such as take power) along with the size of the pH value change can have certain change, thus influence its retention aid effect, such as anionic type retention aid agent on the system pH value dependence is bigger, especially when pH value rises, its retention aid effect greatly abate.
This article chooses less affected by the slurry pH self-control type quaternary ammonium salt cationic monomer participate in cationic organic particles preparation, will the products and anionic polymer composition particle retention aid system applied to wheat straw pulp bleaching.
General polymer retention aid agent to join in thick liquid material, can be in slurry components surface through a series of dynamic change processes: adsorption, reconstruction, diffusion and transfer, molecular chain rupture, so as to reduce the loss of the polymer even flocculation properties.
In organic particles system, the two components on the mechanism of the thick liquid material and the factors which influence the reaction is different, accordingly, selecting proper use proportion in order to get the best synergy retention aid effect is very necessary.
Usually retention aid in the slurry is pointing to join retention aid agent through the colloid adsorption and mechanical intercept role to improve tiny fiber, packing in the online micro-sized particles with, this process tiny fiber, retention aid agent of the composition such as performance (such as take power) along with the size of the pH value change can have certain change, thus influence its retention aid effect, such as anionic type retention aid agent on the system pH value dependence is bigger, especially when pH value rises, its retention aid effect greatly abate.
This article chooses less affected by the slurry pH self-control type quaternary ammonium salt cationic monomer participate in cationic organic particles preparation, will the products and anionic polymer composition particle retention aid system applied to wheat straw pulp bleaching.
General polymer retention aid agent to join in thick liquid material, can be in slurry components surface through a series of dynamic change processes: adsorption, reconstruction, diffusion and transfer, molecular chain rupture, so as to reduce the loss of the polymer even flocculation properties.
In organic particles system, the two components on the mechanism of the thick liquid material and the factors which influence the reaction is different, accordingly, selecting proper use proportion in order to get the best synergy retention aid effect is very necessary.
Online since: August 2021
Authors: Alexander A. Sitnikov, Vladimir I. Yakovlev, Anastasia A. Popova
The using of premixes significantly affects the formation of structure and properties of the finished product.
In the experiment, 3 groups of mechanocomposites were used: 1) Ti + Al, mechanical activation time 3 min. 2) Ti + Al, mechanical activation time 7 min. 3) Ti + Al, mechanical activation time 10 min.
Martynenko, Factors determining the efficiency of magnetron sputtering.
Sushentsov, A.Yu Klochkov, Dependence of morphology, properties, thermal and stressed states of films on process parameters of electric arc evaporation, Tekhnologiya Metallov. 11 (2010) 38-42
Faheem, Study on structural, morphological and electrical properties of sputtered titanium nitride films under different argon gas flow, Materials Chemistry and Physics. 134(2-3) (2012) 839-844
In the experiment, 3 groups of mechanocomposites were used: 1) Ti + Al, mechanical activation time 3 min. 2) Ti + Al, mechanical activation time 7 min. 3) Ti + Al, mechanical activation time 10 min.
Martynenko, Factors determining the efficiency of magnetron sputtering.
Sushentsov, A.Yu Klochkov, Dependence of morphology, properties, thermal and stressed states of films on process parameters of electric arc evaporation, Tekhnologiya Metallov. 11 (2010) 38-42
Faheem, Study on structural, morphological and electrical properties of sputtered titanium nitride films under different argon gas flow, Materials Chemistry and Physics. 134(2-3) (2012) 839-844
Online since: August 2013
Authors: Xue Ping Ren, Jian Da Gao
FEM Analysis of Contact for Converter Spherical Hinge
Xue Ping Ren1, a, Jian Da Gao2,b
1 Department of Mechanical Engineering Inner Mongolia University of Science & Technology Baotou, China
2 Department of Mechanical Engineering Inner Mongolia University of Science & Technology Baotou, China
arxp@imust.cn, b gaojd_1986@163.com
Keywords: Converter;Spherical hinge support;FEM
Abstract: The role of converter spherical hinge is one of the main components, combined with practical work and With help of FEM, Thermal Stress coupling field of spherical washer can been obtained through numerical simulation.
Introduction In process of converter working , at the contact surface of the spherical pad and a lower spherical seat is not only affected by the loading but also by the action of high temperature released by the furnace body, physical property parameters of connecting device material changes with temperature, the spherical hinge in a very complex and harsh working environment ,at the same time in the process of the work, the spherical pad relative to the lower spherical seat relative sliding, resulting in the contact area decreases, sometimes resulting in contact stress is too large in the special position, the force will be transferred to the bolts, the bolt tensile stress increases will make it easy to fracture.
Friction stress The maximum stress for ,Contact friction stress 340,( The safety factor 1.5) Although theoretically is safe, but the safety coefficient is low.
Oxygen converter steelmaking [M] Mechanical Industry Press,1983.3 [2] Pu Liang gui,Ji Ming gang.
Mechanical design [M].
Introduction In process of converter working , at the contact surface of the spherical pad and a lower spherical seat is not only affected by the loading but also by the action of high temperature released by the furnace body, physical property parameters of connecting device material changes with temperature, the spherical hinge in a very complex and harsh working environment ,at the same time in the process of the work, the spherical pad relative to the lower spherical seat relative sliding, resulting in the contact area decreases, sometimes resulting in contact stress is too large in the special position, the force will be transferred to the bolts, the bolt tensile stress increases will make it easy to fracture.
Friction stress The maximum stress for ,Contact friction stress 340,( The safety factor 1.5) Although theoretically is safe, but the safety coefficient is low.
Oxygen converter steelmaking [M] Mechanical Industry Press,1983.3 [2] Pu Liang gui,Ji Ming gang.
Mechanical design [M].
Online since: June 2012
Authors: Wen Chieh Wu, Chin Wei Liu, You Lun Chen
It is not necessary to prepare a number of electrodes, and machined shapes can be easily estimated according to the movement path and shape of the electrode. [1]
Electrochemical machining requires consideration of multiple factors, including electrochemistry, electrical fields, flow field and machine characteristics.
The high cost of electrochemical machining equipment affects capacity utilization.
Properties of ECM systems.
Several factors should be considered to avoid problems arising from specialized working conditions.
Properties of RMS.
The high cost of electrochemical machining equipment affects capacity utilization.
Properties of ECM systems.
Several factors should be considered to avoid problems arising from specialized working conditions.
Properties of RMS.
Online since: November 2011
Authors: Xin Zhi Zeng, Ze Fa Fang
Based on the theory of fuzzy mathematics, there are two factors affecting the accuracy and scientificity of fuzzy comprehensive evaluation except choosing of accurate evaluation model.
There is a whole goal system which has n evaluation factors marked as A1, A2,···,An.
(11) In a goal system, a plan was evaluated on evaluation factors {}.
First, to make a statistic about all the evaluation factors’ index of every monomer, such as um1, um2,···,umm.
Because of the ore or rock mechanical properties, geological structure, the environment of blasting area etc., an open pit’s bench blasting is restricted or infected in different terms, different places and different conditions.
There is a whole goal system which has n evaluation factors marked as A1, A2,···,An.
(11) In a goal system, a plan was evaluated on evaluation factors {}.
First, to make a statistic about all the evaluation factors’ index of every monomer, such as um1, um2,···,umm.
Because of the ore or rock mechanical properties, geological structure, the environment of blasting area etc., an open pit’s bench blasting is restricted or infected in different terms, different places and different conditions.
Online since: June 2023
Authors: Mouad Bellahkim, Youssef Benbouras, Aziz Maziri, El Hassan Mallil, Jamal Echaabi
One of the main factors affecting the incidence of delamination close to the open edges is the stacking sequence.
However, it had a remarkable anisotropy for the mechanical properties and they showed premature failure due to effect of shear and local deformation (Fig. 5 and Fig. 7).
The specimens C and D show a nonlinear behavior with matrix cracking and a significant reduction in their mechanical properties in terms of flexural strength (Fig. 12 and Fig. 16).
However, it had a remarkable anisotropy for the mechanical properties and it showed premature failure due to shear and local effects.
Conversely, unidirectional [45]3S and [30]3S laminates showed a nonlinear behavior with matrix cracking and a significant reduction in their mechanical properties in terms of flexural strength.
However, it had a remarkable anisotropy for the mechanical properties and they showed premature failure due to effect of shear and local deformation (Fig. 5 and Fig. 7).
The specimens C and D show a nonlinear behavior with matrix cracking and a significant reduction in their mechanical properties in terms of flexural strength (Fig. 12 and Fig. 16).
However, it had a remarkable anisotropy for the mechanical properties and it showed premature failure due to shear and local effects.
Conversely, unidirectional [45]3S and [30]3S laminates showed a nonlinear behavior with matrix cracking and a significant reduction in their mechanical properties in terms of flexural strength.