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Online since: March 2023
Authors: Chen Kai Zhong
In this paper, the structure and properties of different carbon materials and their free radical/non-free radical activation pathways were systematically described, and the effects of various environmental factors on the degradation of antibiotics by carbon materials/PS system were discussed, in order to provide scientific basis for the development of this technology in the field of degradation of antibiotics.
Factors Affecting the Degradation of Antibiotics by Activated Persulfate from Carbon Materials PS Dosing Quantity.
The dosage of PS is an important factor affecting the degradation effect of antibiotics.
The amount of catalyst is another important factor affecting the degradation effect of antibiotics.
In this paper, the research progress on the degradation of antibiotic pollutants by activated PS with carbon materials is reviewed, including the structure and properties of different carbon materials, activation progress, reaction mechanism, effect and influencing factors of different carbon materials.
Factors Affecting the Degradation of Antibiotics by Activated Persulfate from Carbon Materials PS Dosing Quantity.
The dosage of PS is an important factor affecting the degradation effect of antibiotics.
The amount of catalyst is another important factor affecting the degradation effect of antibiotics.
In this paper, the research progress on the degradation of antibiotic pollutants by activated PS with carbon materials is reviewed, including the structure and properties of different carbon materials, activation progress, reaction mechanism, effect and influencing factors of different carbon materials.
Online since: February 2018
Authors: Alina Arenta, Ruta Kampare, Zane Sustere, Kristaps Māliņš, Valdis Kampars
The viscosity after reaction decreased ~6 times and cold flow properties were significantly improved.
Cold flow properties are relatively close to pure FAME obtained from RO and methanol in transesterification reaction [8].
Saeed, Investigation of the factors affecting the progress of base-catalyzed transesterification of rapeseed oil to biodiesel FAME, Fuel Process.
Apseniece, Properties of rapeseed oil fatty acid alkyl esters derived from different alcohols, Fuel 137 (2014) 28-35
Main production pathways and effects on fuel properties and engine performance: A critical review, Renew.
Cold flow properties are relatively close to pure FAME obtained from RO and methanol in transesterification reaction [8].
Saeed, Investigation of the factors affecting the progress of base-catalyzed transesterification of rapeseed oil to biodiesel FAME, Fuel Process.
Apseniece, Properties of rapeseed oil fatty acid alkyl esters derived from different alcohols, Fuel 137 (2014) 28-35
Main production pathways and effects on fuel properties and engine performance: A critical review, Renew.
Online since: October 2010
Authors: Gui Cheng Wang, Chun Gen Shen, Shu Lin Wang, Wen Wu Nie, Gang Liu
At present, the research of high-speed machining tool technology focuses on the spindle/toolholder connection performance [2,3], the studies show that: the connection performance between spindle and toolholder is an important condition to ensure the high-speed cutting reliability, but we have not paid enough attention to the whole dynamic performance of tool system structure, especially the dynamic response caused by imbalances factors in HSM.
HSK63A toolholder was built based on the ISO12164-1 standard using the parametric method, their physical and mechanical properties were shown as follow in Table 1: Table 1 Material properties of HSK63A tool system components Appellation Material Density [Kg/m3] Young modulus [GPa] Poisson ratio Tensile strength limit [MPa] Yield strength [MPa] Tool holder 40CrNi2Mo 7.85 193 0.284 1240 1178 Cutting tool Cemented Carbide 19.3 400 0.28 980 750 We combined the toolholder and collect chunk as one part for reducing the computing scale with the finite element method, so we only need to establish finite element model of toolholder and cutting tool.
We have got the structural modal parameters of HSK63A tool system with the finite element method, but there are some factors which affect the calculation accuracy such as minutiae features neglected in modeling and the size of meshing.
At present, EMA has become the most important method of vibration analysis in the mechanical engineering.
Schmitz: 2004 ASME International Mechanical Engineering Congress November,(2004), pp. 13-19
HSK63A toolholder was built based on the ISO12164-1 standard using the parametric method, their physical and mechanical properties were shown as follow in Table 1: Table 1 Material properties of HSK63A tool system components Appellation Material Density [Kg/m3] Young modulus [GPa] Poisson ratio Tensile strength limit [MPa] Yield strength [MPa] Tool holder 40CrNi2Mo 7.85 193 0.284 1240 1178 Cutting tool Cemented Carbide 19.3 400 0.28 980 750 We combined the toolholder and collect chunk as one part for reducing the computing scale with the finite element method, so we only need to establish finite element model of toolholder and cutting tool.
We have got the structural modal parameters of HSK63A tool system with the finite element method, but there are some factors which affect the calculation accuracy such as minutiae features neglected in modeling and the size of meshing.
At present, EMA has become the most important method of vibration analysis in the mechanical engineering.
Schmitz: 2004 ASME International Mechanical Engineering Congress November,(2004), pp. 13-19
Online since: November 2015
Authors: Aurelian Albut
Since the springback is also affected by the material properties, such as Young’s modulus and initial yield stress, the process design for magnesium sheets is more complicated due to low formability.
Different orientation of the rolling direction with respect to the deformation direction Experimental Tests In the first stage of experimental research, tensile tests have been carried out to determine the mechanical properties of the magnesium alloy AZ31 in order to use them as input for simulations.
The forming force was generated using a mechanical tensile test machine.
When properly used, simulation by finite element method can be considered a valuable tool in the study of the influencing factors of the springback phenomenon able to offer accurate data even from the design stage.
Chirita, Factors of influence on the springback of formed metal sheets, ESAFORM The 5th International Conference on Material Forming, Krakow, Poland, 2002.
Different orientation of the rolling direction with respect to the deformation direction Experimental Tests In the first stage of experimental research, tensile tests have been carried out to determine the mechanical properties of the magnesium alloy AZ31 in order to use them as input for simulations.
The forming force was generated using a mechanical tensile test machine.
When properly used, simulation by finite element method can be considered a valuable tool in the study of the influencing factors of the springback phenomenon able to offer accurate data even from the design stage.
Chirita, Factors of influence on the springback of formed metal sheets, ESAFORM The 5th International Conference on Material Forming, Krakow, Poland, 2002.
Online since: September 2007
Authors: Er Yu Shao, Bo Lin He, Ying Xia Yu
Study on Impact Fatigue Life of 42CrMo Steel with M+F
Dual-Phase Structure
Bolin HE
1, a
, Yingxia YU
1, b
and Eryu SHAO
2, c
1
School of Mechanical & Electrical Engineering, East China Jiaotong University,
Nanchang 330013, China
2
Material Institute, Henan University of Science and Technology, Luoyang 471003,China
a
hebolin@163.com,
b
yuyingxia@163.com,
c
shaoeryu@haust.edu.cn
Keywords: Impact fatigue; Undissolved ferrite; Dual-phase structures; Fatigue property; Failure
mechanism.
The effect of undissolved ferrite amount on impact fatigue properties and failure mechanism were studied by using 42CrMo steel with subcritical quenching process The amount of undissolved ferrite were 0%, 10% and 15%, respectively.
Introduction Microstructure is one of important factors which affect the fatigue properties and fatigue life.
The effects of undissolved ferrite on impact fatigue properties and fatigue life were discussed.
The effect of undissolved ferrite amount on impact fatigue properties and failure mechanism were studied by using 42CrMo steel with subcritical quenching process The amount of undissolved ferrite were 0%, 10% and 15%, respectively.
Introduction Microstructure is one of important factors which affect the fatigue properties and fatigue life.
The effects of undissolved ferrite on impact fatigue properties and fatigue life were discussed.
Online since: July 2019
Authors: Damjan Cekerevac, Constanca Rigueiro, Eduardo Pereira
All of the mentioned properties are summarized in Table 1.
Sandwich composites are interesting for offshore applications due to their high strength-to-weight ratio and adaptable mechanical properties.
Observations showed that thicker CFRP corrugations offer properties that are similar to those of aluminium honeycombs.
In order to better characterize the response of such solution, it is recommended to assume different connector properties and to model the connection in more detail.
Acknowledgement This work was partly financed by FEDER funds through the Competitivity Factors Operational Programme - COMPETE and by national funds through FCT – Foundation for Science and Technology within the scope of the project POCI-01-0145-FEDER-007633.
Sandwich composites are interesting for offshore applications due to their high strength-to-weight ratio and adaptable mechanical properties.
Observations showed that thicker CFRP corrugations offer properties that are similar to those of aluminium honeycombs.
In order to better characterize the response of such solution, it is recommended to assume different connector properties and to model the connection in more detail.
Acknowledgement This work was partly financed by FEDER funds through the Competitivity Factors Operational Programme - COMPETE and by national funds through FCT – Foundation for Science and Technology within the scope of the project POCI-01-0145-FEDER-007633.
Online since: December 2012
Authors: Lei Xie, Gerhard Ziegmann, Wang Qing Wu, Bin Yan Jiang
Because the compaction response of the textile reinforcement can affect both the manufacturing parameters like permeability and the mechanical properties of the final product due to the variation of Fiber Volume Content (FVC).
Typical compaction procedure 2.3 Design of experiments Tab. 1 indicates the compaction and preforming parameters (factors) and their values (levers).
The factors chosen for the compaction experiments were: (1) compaction temperature, , (2) binder activation temperature, , (3) binder content, and (3) binder activation time, .
Tab. 1 Compaction and preforming parameters used in the experiments Levels Factors Compactiontemperature Binder activationtemperature Binder content Binder activation time A [°C] B [°C] C [wt.%] D [min] 1 25 90 1 0.5 2 60 100 3 1.0 3 125 110 5 1.5 4 190 120 7 2.0 To save the experimental effort, orthogonal arrays, in which the columns for the independent variables are orthogonal to one another, are often employed in industrial experiments to study the effect of several control factors.
Properties of poly(butylene terephthatlate) polymerized from cyclic oligomers and its composites.
Typical compaction procedure 2.3 Design of experiments Tab. 1 indicates the compaction and preforming parameters (factors) and their values (levers).
The factors chosen for the compaction experiments were: (1) compaction temperature, , (2) binder activation temperature, , (3) binder content, and (3) binder activation time, .
Tab. 1 Compaction and preforming parameters used in the experiments Levels Factors Compactiontemperature Binder activationtemperature Binder content Binder activation time A [°C] B [°C] C [wt.%] D [min] 1 25 90 1 0.5 2 60 100 3 1.0 3 125 110 5 1.5 4 190 120 7 2.0 To save the experimental effort, orthogonal arrays, in which the columns for the independent variables are orthogonal to one another, are often employed in industrial experiments to study the effect of several control factors.
Properties of poly(butylene terephthatlate) polymerized from cyclic oligomers and its composites.
Online since: February 2013
Authors: Chang Song Zheng, He Yan Li, Xian Quan Zhang, Jia Xin Zhao, Biao Ma, Kai Li Yang
Research on pressure perturbation excited by TEI and its influencing factors, can contribute to accurate pressure design, thus ensuring its reliability, reducing design margin and improving the compactness of the clutch assembly.
All of the mechanical energy converts to thermal energy by friction on the friction interface according to the energy conservation.
So the heat generated from sliding friction should be equal to mechanical energy loss.
Assumed that the friction element material is isotropic, physical properties of the materials keep the same in the process of shifting.
[11] Zhang Jin-le, Ma Biao, Zhang Ying-feng and LI He-yan, Study on the factors affecting temperature field and stress field of the wet shift clutch, Journal of Beijing Institute of Technology [J], 2010, Volume 30, No. 6
All of the mechanical energy converts to thermal energy by friction on the friction interface according to the energy conservation.
So the heat generated from sliding friction should be equal to mechanical energy loss.
Assumed that the friction element material is isotropic, physical properties of the materials keep the same in the process of shifting.
[11] Zhang Jin-le, Ma Biao, Zhang Ying-feng and LI He-yan, Study on the factors affecting temperature field and stress field of the wet shift clutch, Journal of Beijing Institute of Technology [J], 2010, Volume 30, No. 6
Online since: August 2015
Authors: Aleksandr Prudnikov, Vladimir K. Afanasyev, Marina Popova
Furthermore, we showed that the composition of atmosphere significantly affects structure formation and physic-mechanical properties of aluminum alloys [5-7].
This, in turn, leads to the change of the structure and properties of aluminum alloys, in particular, it affects their coefficient of linear expansion.
Results We implemented comparative analysis of the properties of alloy Al – 5% Cu after boiling treatment during 15, 30 and 45 hours respectively.
Gregson, Predicting the structural performance of heat-treatable Al-alloys, Aluminum Alloys: their physical and mechanical properties, 2000, vol. 331-337, p. 97-110
Tumbull, Effects of Hydrogen on Properties of Aluminum Alloys, Paper from Hydrogen in Metals, American Society for Metals, 1974, 277-287
This, in turn, leads to the change of the structure and properties of aluminum alloys, in particular, it affects their coefficient of linear expansion.
Results We implemented comparative analysis of the properties of alloy Al – 5% Cu after boiling treatment during 15, 30 and 45 hours respectively.
Gregson, Predicting the structural performance of heat-treatable Al-alloys, Aluminum Alloys: their physical and mechanical properties, 2000, vol. 331-337, p. 97-110
Tumbull, Effects of Hydrogen on Properties of Aluminum Alloys, Paper from Hydrogen in Metals, American Society for Metals, 1974, 277-287
Online since: September 2013
Authors: John Mo, Song Lin Ding, Arash Pourmoslemi, M. Zulafif Rahim
Zulafif Rahima, Arash Pourmoslemib, Songlin Dingc, John Mod
School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, Australia
as3372621@student.rmit.edu.au, bs3342272@student.rmit.edu.au, csonglin.ding@rmit.edu.au, djohn.mo@rmit.edu.au
Keywords: Residual Stress, Raman Spectrum, PCD, Polycrystalline Diamond, EDM
Abstract.
Diamond grain size is the main factor that determines the mechanical properties of PCD, and it is usually in the range between 1 to 80 µm.
Application of PCD is not only restricted to mechanical engineering, it can also be used as a high temperature electrical or optical devices.
The layer of PCD that is subjected to high temperature but not enough to be melted is called heat affected zone (HAZ).
HAZ is unavoidable in all thermal processes and emerges in a few microns underneath the surface that is affected by heat.
Diamond grain size is the main factor that determines the mechanical properties of PCD, and it is usually in the range between 1 to 80 µm.
Application of PCD is not only restricted to mechanical engineering, it can also be used as a high temperature electrical or optical devices.
The layer of PCD that is subjected to high temperature but not enough to be melted is called heat affected zone (HAZ).
HAZ is unavoidable in all thermal processes and emerges in a few microns underneath the surface that is affected by heat.