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Online since: November 2015
Authors: A. Rajaraman, Philip Saratha Joanna, Dalbir Singh, C. Ganesan
A series of experiments were carried out to find the variation in mechanical properties in all composites due to displacement controlled tests with different displacement rates such as 0.5mm/min, 1.0 mm/min and 1.5mm/min.
The main reason is that mechanical properties of composite materials vary significantly with changing the displacement rate and strain rate due to their non homogeneity nature [2, 3].
This will directly affect the strength and performance of all composites at different stages.
Conclusions The present study examined the effect of displacement control rates on the mechanical properties of advanced composites such as GFRP, CFRP and KFRP.
Reis, Effects of Strain Rate and Temperature on the Mechanical Properties of Gfrp Composites, Engenharia Térmica (Thermal Engineering). 10 (2011) 03-06
The main reason is that mechanical properties of composite materials vary significantly with changing the displacement rate and strain rate due to their non homogeneity nature [2, 3].
This will directly affect the strength and performance of all composites at different stages.
Conclusions The present study examined the effect of displacement control rates on the mechanical properties of advanced composites such as GFRP, CFRP and KFRP.
Reis, Effects of Strain Rate and Temperature on the Mechanical Properties of Gfrp Composites, Engenharia Térmica (Thermal Engineering). 10 (2011) 03-06
Online since: January 2022
Authors: Chen Guang Xu, Jin Jun Tang, Cui Liang
Cu-Cr-Sn, Cu-Cr-Zr and Cu-Fe-P copper alloys with high strength and high conductivity have many influencing factors on their properties, such as matrix doping state, type and content of second phase, microstructure and interface characteristics, deformation and heat treatment process, etc [3, 4].
Prediction and screening of characteristic microstructure and material composition sequence with excellent mechanical, electrical and thermodynamic properties.
The crystal structures of poscor 12, poscor 7 and poscor 19 had large elastic modulus and Poisson's ratio and good mechanical properties.
It can be seen from the comprehensive calculation results that the crystal structure phases of poscor7, poscor12, poscor19 and poscor22 have better comprehensive mechanical and electrical properties.
The crystal structures of posscor12, posscor7 and posscor19 have large elastic modulus and Poisson's ratio, and have good mechanical properties.
Prediction and screening of characteristic microstructure and material composition sequence with excellent mechanical, electrical and thermodynamic properties.
The crystal structures of poscor 12, poscor 7 and poscor 19 had large elastic modulus and Poisson's ratio and good mechanical properties.
It can be seen from the comprehensive calculation results that the crystal structure phases of poscor7, poscor12, poscor19 and poscor22 have better comprehensive mechanical and electrical properties.
The crystal structures of posscor12, posscor7 and posscor19 have large elastic modulus and Poisson's ratio, and have good mechanical properties.
Online since: October 2010
Authors: Kazimierz Reszka, Jan Rakoczy, Jerzy Morgiel
Application of SEM/TEM to tests on Pt distribution in Al2O3 films obtained by oxidising FeCrAl steel foil coated with Pt-Al nanofilms
Kazimierz Reszka1, a Jan Rakoczy2, b Jerzy Morgiel3, c
1 Institute of Mechatronics, Nanotechnology and Vacuum Technique, Koszalin University of Technology, Śniadeckich str. 2, 75-435 Koszalin, Poland
2 Institute of Organic Chemistry and Technology, Cracow University of Technology, Warszawska str. 24, 31-155 Cracow, Poland
3 Institute of Metallurgy and Materials Science, PAS, Reymonta str. 25, 30-059 Kraków, Poland
a kazimierz.reszka@tu.koszalin.pl, b jrakoczy@indy.chemia.pk.edu.pl,
c nmmorgie@imim-pan.krakow.pl
Keywords: aluminium, FeCrAl steel, nanofilm, oxidation, platinum, whisker
Abstract
Good dispersion of active catalytic elements, their uniform distribution on the carrier’s surface and availability for neutralised combustion gases are key factors that determine the usability of catalyst cartridges for automotive catalytic reactors.
The metal-block converters compared with universally applied catalytic converters built of ceramic blocks are marked by better thermal conductivity, higher resistance to mechanical damages and less thermal shock sensitivity.
The occurrence of platinum, which showed good oxygen chemisorption properties[4], was an additional factor affecting the higher weight gain of oxide.
This difficulty results from interactions between particles of platinum and alumina crystal nuclei, affecting the random direction of their growth and defectiveness.
The metal-block converters compared with universally applied catalytic converters built of ceramic blocks are marked by better thermal conductivity, higher resistance to mechanical damages and less thermal shock sensitivity.
The occurrence of platinum, which showed good oxygen chemisorption properties[4], was an additional factor affecting the higher weight gain of oxide.
This difficulty results from interactions between particles of platinum and alumina crystal nuclei, affecting the random direction of their growth and defectiveness.
Online since: December 2012
Authors: Jun Deng, Ning Fang Yue, Xin Hai Zhang, Yong Fei Jin
For example, the large rod diameter SHPH test system is used for the research on the mechanical properties of the rock [13], and the CT technology is used for the research on the evolution law of the damage to the rock [14].
Wang Shengzu [15] puts forward the three-axial test facility with the confining pressure medium such as argon and carbon dioxide which is used for the research on the mechanical properties of the rock at the high temperature ranging from 1000 to 1400℃ so as to meet the need of the quantitative research on the rock mechanism under the high temperature and high pressure.
Li Tangshan et al [25] make the analysis of the factors affecting the fire heating air pressure in the coalfield outcrop fire zone, and find out the calculation equation of the fire heating are pressure under the influence of the terrain and air velocity.
Journal of Chongqing University, 2011,34(11): 122~127 [13] Tubing Yin, Xibing Li, Zilong Zhou, Liang Hong, Zhouyuan Ye.Study on Mechanical Properties of Post-High-Temperature Sandstone[J].
Temperature Load Granite and Mechanical Properties of Evolution and Microscopic Mechanism Research[D].
Wang Shengzu [15] puts forward the three-axial test facility with the confining pressure medium such as argon and carbon dioxide which is used for the research on the mechanical properties of the rock at the high temperature ranging from 1000 to 1400℃ so as to meet the need of the quantitative research on the rock mechanism under the high temperature and high pressure.
Li Tangshan et al [25] make the analysis of the factors affecting the fire heating air pressure in the coalfield outcrop fire zone, and find out the calculation equation of the fire heating are pressure under the influence of the terrain and air velocity.
Journal of Chongqing University, 2011,34(11): 122~127 [13] Tubing Yin, Xibing Li, Zilong Zhou, Liang Hong, Zhouyuan Ye.Study on Mechanical Properties of Post-High-Temperature Sandstone[J].
Temperature Load Granite and Mechanical Properties of Evolution and Microscopic Mechanism Research[D].
Online since: October 2011
Authors: Chong Fang Ma, Wei Wang, Yu Ting Wu, Jian Yu
However, there are many factors to influence thermodynamic efficiencies, such as evaporate and condense pressure, superheat and subcooling of working fluid, heat source temperature and flow rate, adiabatic efficiency of expander, heat transfer coefficient of evaporator and lubrication measure for some type expanders, and so on.
This article attempt to analyze efficiency factors on low temperature energy conversion based on ORC from the point view of combined working fluid and expander type, it could provide a perspective to analyze and compare the application prospect of different expanders.
Main parameters affecting the performance of piston expander are include relative clearance volume factor, the relative compression factor, relative intake factor, intake pressure and exhaust pressure, etc.
Working fluid thermodynamic property In this paper, from the angle of the heat efficiency and pressure ratio, the thermodynamic properties of three Freon was analyzed and compared.
Washington, D.C.: School of Mechanical Engineering, Purdue University, 2003 [3] K.
This article attempt to analyze efficiency factors on low temperature energy conversion based on ORC from the point view of combined working fluid and expander type, it could provide a perspective to analyze and compare the application prospect of different expanders.
Main parameters affecting the performance of piston expander are include relative clearance volume factor, the relative compression factor, relative intake factor, intake pressure and exhaust pressure, etc.
Working fluid thermodynamic property In this paper, from the angle of the heat efficiency and pressure ratio, the thermodynamic properties of three Freon was analyzed and compared.
Washington, D.C.: School of Mechanical Engineering, Purdue University, 2003 [3] K.
Online since: January 2025
Authors: Mohd Ahmad Zaharuddin Faridh, Shaik Syahman, Safian Sharif, Mokhtar Awang
This experiment was conducted using two factors and two levels of design of the experiment setup.
Material properties of Zn-Coated metal sheet.
This experiment was conducted using two factors and two levels as per Table 2 and Table 3.
The affected samples are sample 1, 3, 5, 6, 8 and 9.
Liao, “Microstructure and mechanical properties of friction lap-butt welded ultra-thin galvanized steel sheets,” J Manuf Process, vol. 45, no.
Material properties of Zn-Coated metal sheet.
This experiment was conducted using two factors and two levels as per Table 2 and Table 3.
The affected samples are sample 1, 3, 5, 6, 8 and 9.
Liao, “Microstructure and mechanical properties of friction lap-butt welded ultra-thin galvanized steel sheets,” J Manuf Process, vol. 45, no.
Online since: July 2014
Authors: Ya Na Zhang, Yan Liu, Zhen Qiang Wang
Freeze-thaw cycles can affect the chloride diffusivity of concrete to a certain extend.
Therefore, if only one single factor [1-2] is taken into account, it is fulled with limitations to establish the empirical formula.
In present, it can be found from the related research[3-4] on influences of concrete properties caused by the interaction effect damage, such as freeze-thaw cycles with sea water corrode and freeze-thaw cycles with chemical corrosion.
In this paper, the change law of concrete properties under interaction effect by freeze-thaw cycles and chlorion penetration are further determined through experimental study.
(in Chinese) [4] Manli Yu,Shouwei Jian and Song Mu: Influence of Thaw-freeze Cycle and Seawater Immersion Dual Factors to Concrete Performance[J].Water transport in China, 2007 (5) : pp.58to59.
Therefore, if only one single factor [1-2] is taken into account, it is fulled with limitations to establish the empirical formula.
In present, it can be found from the related research[3-4] on influences of concrete properties caused by the interaction effect damage, such as freeze-thaw cycles with sea water corrode and freeze-thaw cycles with chemical corrosion.
In this paper, the change law of concrete properties under interaction effect by freeze-thaw cycles and chlorion penetration are further determined through experimental study.
(in Chinese) [4] Manli Yu,Shouwei Jian and Song Mu: Influence of Thaw-freeze Cycle and Seawater Immersion Dual Factors to Concrete Performance[J].Water transport in China, 2007 (5) : pp.58to59.
3D Topography Analysis of Ball-End Milled H-13 Die Steel Surfaces Using Wavelet Decomposition Method
Online since: May 2016
Authors: Jun Zhao, Shuai Liu, Xian Hua Tian, Wen Zhen Qin
Experimental details
The workpiece material is H-13 steel which is widely used in die&mould industries because of its good mechanical and thermal properties.
In order to study the influence of different cutter postures on machined surface topograph, we design single factor experiment of cutter postures.
The roughnesses in different scales are linked with machining process and material property closely.
The roughness of frequency band D6 is almost the largest that means the feed per tooth and radial depth of cut are the main factors influencing the surface topography.
This shows that the changing of cutter postures affects the frequency band D7.
In order to study the influence of different cutter postures on machined surface topograph, we design single factor experiment of cutter postures.
The roughnesses in different scales are linked with machining process and material property closely.
The roughness of frequency band D6 is almost the largest that means the feed per tooth and radial depth of cut are the main factors influencing the surface topography.
This shows that the changing of cutter postures affects the frequency band D7.
Online since: October 2013
Authors: Feng Tao Sui, Kang Kang Sun, Wei Ding, Qing Liu
As is known to all, SPT is affected by many factors, such as machines and equipments, ways of drop hammer, and test methods etc, which can through standardized method to achieve unification to reduce the impact on the test results.
Whereas, the influence of other factors cannot be controlled artificially, such as rod length, rod lateral friction, groundwater and overburden pressure etc.
Energy reduction ratio was only 5.4% when the rod length changed from 15m to 100m, whose impact on the value of N far less than other construction factors, such as stress states of borehole bottom and drilling technology.
Whereas, the limitation of rod length in SPT has surpassed 21m and the longest has surpassed more than 100m in actual engineering,with the value of N still can reflect the mechanical properties of soil, so the method of rod length modification has naturally met the challenge.
Because SPT is affected by many factors, with any kind of theory has their limitation, so it is difficult to strictly conform to the actual engineering situation.
Whereas, the influence of other factors cannot be controlled artificially, such as rod length, rod lateral friction, groundwater and overburden pressure etc.
Energy reduction ratio was only 5.4% when the rod length changed from 15m to 100m, whose impact on the value of N far less than other construction factors, such as stress states of borehole bottom and drilling technology.
Whereas, the limitation of rod length in SPT has surpassed 21m and the longest has surpassed more than 100m in actual engineering,with the value of N still can reflect the mechanical properties of soil, so the method of rod length modification has naturally met the challenge.
Because SPT is affected by many factors, with any kind of theory has their limitation, so it is difficult to strictly conform to the actual engineering situation.
Online since: July 2011
Authors: Xue Mei Wu, Lǜ Yang, Yi Li, Yuan Kang Zhou
The wear mass loss is used to assess the anti-wear properties of different additives.
The factors that cause the improvement of anti-friction properties of the friction pairs lie in the quality and the silver content of the auto-restoration films formed on the surfaces of friction pairs.
The anti-friction and auto-restoration properties of sole nanomaterial will be restricted by its own physical and chemical properties.
Meanwhile, Ag was also a major factor that influenced the improvement of the antiwear property.
Preparation and tribological properties of surface modified Ag nanoparticles.
The factors that cause the improvement of anti-friction properties of the friction pairs lie in the quality and the silver content of the auto-restoration films formed on the surfaces of friction pairs.
The anti-friction and auto-restoration properties of sole nanomaterial will be restricted by its own physical and chemical properties.
Meanwhile, Ag was also a major factor that influenced the improvement of the antiwear property.
Preparation and tribological properties of surface modified Ag nanoparticles.