Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: September 2015
Authors: S.L. Soo, A. Barnacle, D.K. Aspinwall, Nor Hafiez Mohamad Nor, J.B. Saedon
Mohamad Nor1,d
1Faculty of Mechanical Engineering, Universiti Teknologi MARA, Malaysia.
2Machining Research Group, University Of Birmingham, United Kingdom.
3MMC Hardmetal UK, Tamworth, United Kingdom.
This was mainly attributed to the comparatively low levels of mechanical force and temperatures generated during the micro milling operation.
Introduction Workpiece surface integrity can be defined as the description and control of alterations produced in a surface layer during machining, which has a significant influence on the properties and service life of the final components.
The main factors affecting the surface integrity of a machined component are typically related to mechanical loads, thermal gradients and phase transformation present during the cutting process.
Acknowledgments The authors would like to thank the Faculty of Mechanical Engineering (AMTEX), Research Management Institute (RMI-600-RMI/FRGS 5/3 (20/2013)), Universiti Teknologi MARA and Ministry of Education, Malaysia for the research funding under Fundamental Research Grant Scheme (FRGS).
This was mainly attributed to the comparatively low levels of mechanical force and temperatures generated during the micro milling operation.
Introduction Workpiece surface integrity can be defined as the description and control of alterations produced in a surface layer during machining, which has a significant influence on the properties and service life of the final components.
The main factors affecting the surface integrity of a machined component are typically related to mechanical loads, thermal gradients and phase transformation present during the cutting process.
Acknowledgments The authors would like to thank the Faculty of Mechanical Engineering (AMTEX), Research Management Institute (RMI-600-RMI/FRGS 5/3 (20/2013)), Universiti Teknologi MARA and Ministry of Education, Malaysia for the research funding under Fundamental Research Grant Scheme (FRGS).
Online since: October 2016
Authors: Alexander Pesin, D.O. Pustovoytov
Contact friction is one of the main factors that affect the shear strain during HRDSR.
Further experimental investigation of microstructure and mechanical properties of Al 5083 sheet processed by HRDSR is required.
Park, Effect of speed-ratio on microstructure, and mechanical properties of Mg-3Al-1Zn alloy, in differential speed rolling, J.
Ko, Effect of differential speed rolling strain on microstructure and mechanical properties of nanostructured 5052 Al alloy, J.
Krallics, Microstructure and mechanical properties of Al 7075 alloy processed by differential speed rolling, Periodica Polytechnica Mechanical Engineering. 56 (2012) 111-115
Further experimental investigation of microstructure and mechanical properties of Al 5083 sheet processed by HRDSR is required.
Park, Effect of speed-ratio on microstructure, and mechanical properties of Mg-3Al-1Zn alloy, in differential speed rolling, J.
Ko, Effect of differential speed rolling strain on microstructure and mechanical properties of nanostructured 5052 Al alloy, J.
Krallics, Microstructure and mechanical properties of Al 7075 alloy processed by differential speed rolling, Periodica Polytechnica Mechanical Engineering. 56 (2012) 111-115
Online since: February 2011
Authors: Zhen Luo, Jian Wu Zhang, Ya Li Li, Jing Dong Zhu
For CNTs, regardless of single-walled CNTs (SWNTs) or multi-walled CNTs (MWNTs), exhibit a great advantages in many fields, it has excellent elastic buckling property, good electrically conducting, and perfectly thermal properties [1].
Tab.1 the physical-chemical properties of CNTs OD or thickness Purity Length EC SSA CNTs dispersed 20nm >95% 0.5 mm >90 >350 CNTs film 20nm >90% 50 mm >90 >350 Method and experimental.
Under the action of the bonding head press the workpieces with ultra-high frequency vibration, the clinged bonding surface of different weldment would be melt and bond together immediately, so high weld strength, narrow heat affect zone and some other well mechanical properties welded joint was obtain.
What’s more, the frequency of ultrasonic vibration was another important factor affect the combination of CNTs and metal electrode.
Good mechanical contact between CNTs and metal could obtain.
Tab.1 the physical-chemical properties of CNTs OD or thickness Purity Length EC SSA CNTs dispersed 20nm >95% 0.5 mm >90 >350 CNTs film 20nm >90% 50 mm >90 >350 Method and experimental.
Under the action of the bonding head press the workpieces with ultra-high frequency vibration, the clinged bonding surface of different weldment would be melt and bond together immediately, so high weld strength, narrow heat affect zone and some other well mechanical properties welded joint was obtain.
What’s more, the frequency of ultrasonic vibration was another important factor affect the combination of CNTs and metal electrode.
Good mechanical contact between CNTs and metal could obtain.
Online since: July 2014
Authors: Hui Yuan Yang, Wei Chi Ou, Rui Rui Yang
However, in some high-pressure environments needed to be measured that requires better insulating properties such as online monitoring of smart switch, real-time measuring of high-voltage transformer winding temperature, current and other parameters, electrical sensing technology using in traditional smart substation is not applicable.
Special optical fiber sensing technology Special optical fiber sensing technology has many advantages: small energy loss, stable chemical properties, small cross-section, strong anti-noise capability, anti-electromagnetic interference, no spark, no short circuit fault, high temperature resistance and so on.
Based on the polarization properties of optical fibers, it measures current indirectly by measuring Faraday rotation angles in optical fibers.
Because of its fragile mechanical properties, choose acrylate material to be the second cladding layer.
Pressure and Temperature are two main factors in improving its sensitivity: First, since the refractive index of light caused by temperature has the most significant impact on coupling wavelength, the temperature sensitivity of fiber grating can be improved by selecting the appropriate core or cladding doped materials and there density.
Special optical fiber sensing technology Special optical fiber sensing technology has many advantages: small energy loss, stable chemical properties, small cross-section, strong anti-noise capability, anti-electromagnetic interference, no spark, no short circuit fault, high temperature resistance and so on.
Based on the polarization properties of optical fibers, it measures current indirectly by measuring Faraday rotation angles in optical fibers.
Because of its fragile mechanical properties, choose acrylate material to be the second cladding layer.
Pressure and Temperature are two main factors in improving its sensitivity: First, since the refractive index of light caused by temperature has the most significant impact on coupling wavelength, the temperature sensitivity of fiber grating can be improved by selecting the appropriate core or cladding doped materials and there density.
Online since: November 2012
Authors: Xue Wang, Yuan Chen Guo
But the mechanical properties of this material are low, that affecting a wide range of application of the material, so it is imminent to study the material strengthen research.
A large number of closed holes generate when foam mixed in AMP and cement slurry, while the three main factors to affect the material properties of pore structure are hole shape, porosity and pore size distribution.
(1) To improve the early strength of the material, on the one hand, through physical or chemical methods to improve the activity of the AMP, or adding chemical admixtures with early strength properties, on the other hand, we can improve the conservation conditions.
A large number of closed holes generate when foam mixed in AMP and cement slurry, while the three main factors to affect the material properties of pore structure are hole shape, porosity and pore size distribution.
(1) To improve the early strength of the material, on the one hand, through physical or chemical methods to improve the activity of the AMP, or adding chemical admixtures with early strength properties, on the other hand, we can improve the conservation conditions.
Online since: February 2019
Authors: P.A. Kainov, Nour R. Galyavetdinov, Ruslan R. Safin
Variants of floor coverings
Another criterion for choosing silicone as a binder is due to its environmental friendliness under the influence of any temperatures and external factors.
Further, during the experiments, the samples were held for 24 hours for final hardening, before testing its mechanical properties.
Testing of Composites on Physical and Mechanical Properties As a result of the carried out experiments, curves of the dependence of the elastic torque on time were obtained (Fig. 6).
The dependence of the mechanical properties on the amount of filler can be seen in Table 1.
[6] Shahzad A., Effects of fibre surfa treatments on mechanical properties of hemp fibre composites.
Further, during the experiments, the samples were held for 24 hours for final hardening, before testing its mechanical properties.
Testing of Composites on Physical and Mechanical Properties As a result of the carried out experiments, curves of the dependence of the elastic torque on time were obtained (Fig. 6).
The dependence of the mechanical properties on the amount of filler can be seen in Table 1.
[6] Shahzad A., Effects of fibre surfa treatments on mechanical properties of hemp fibre composites.
Online since: April 2015
Authors: Tadeusz Knych, Andrzej Mamala, Beata Smyrak, Wojciech Ściężor, Paweł Kwaśniewski, Michał Jabłoński, Grzegorz Kiesiewicz
The KPT is a function of different factors like conductor materials properties, conductor design, span parameters, sagging procedures and overhead line exploitation conditions.
It should be noted that the conductor installation stress as well as the span length are significant factors constitutive the KPT.
On the Fig. 1.b influence of conductor properties on KPT is shown.
The elastic body can be good approximation of most common used cores due to their very high mechanical properties and high creep resistance, but in external aluminium base layers permanent elongations can appear as a result of the plastic deformation, settlements of the wires or creep.
The model is comprehensive and allows to calculate KPT with taking into account all significant factors like span length, conductor physical properties, temperature and stress during installation, conductor fabrication temperature, permanent strain and compression stresses in aluminium layers.
It should be noted that the conductor installation stress as well as the span length are significant factors constitutive the KPT.
On the Fig. 1.b influence of conductor properties on KPT is shown.
The elastic body can be good approximation of most common used cores due to their very high mechanical properties and high creep resistance, but in external aluminium base layers permanent elongations can appear as a result of the plastic deformation, settlements of the wires or creep.
The model is comprehensive and allows to calculate KPT with taking into account all significant factors like span length, conductor physical properties, temperature and stress during installation, conductor fabrication temperature, permanent strain and compression stresses in aluminium layers.
Online since: July 2020
Authors: Ari Adi Wisnu, Didin Sahidin Winatapura, Yose Fachmi Buys, Setyo Purwanto, Deswita Deswita
The fitting quality of the experimental data was checked using the goodness of fit (c2) and two reliability factors (Rp and Rwp).
Mn3+ and Zn2+ substitution for F3+ ions were found to be affected the magnetic properties.
Manaf, Structural and Magnetic Properties of (Ba1-xLax)Fe12O19 Obtained by Mechanical Alloying and Ultrasonic Irradiation, AIP Conf.
Sharma, Effect of La on Magnetic Properties of BaFe12O19, Trans.
Manaf, Structural and Magnetic Properties Characterization of Mechanical Alloyed La Substituted Ba(1-x)LaxFe12O19(x=0.07,0.15,0.20), AIP Conf.
Mn3+ and Zn2+ substitution for F3+ ions were found to be affected the magnetic properties.
Manaf, Structural and Magnetic Properties of (Ba1-xLax)Fe12O19 Obtained by Mechanical Alloying and Ultrasonic Irradiation, AIP Conf.
Sharma, Effect of La on Magnetic Properties of BaFe12O19, Trans.
Manaf, Structural and Magnetic Properties Characterization of Mechanical Alloyed La Substituted Ba(1-x)LaxFe12O19(x=0.07,0.15,0.20), AIP Conf.
Online since: September 2013
Authors: Guang Jun Ma, Shuo Wu, Guang Qi Cai
In the battery manufacturing process, one of the most important aspects of affecting the consistency is preparation of negative electrode.
Analysis and control of the strip rolling process The rolling of the strip is a very complex process, which will be subject to the interference of a number of factors, input and uniformity of the liquid hydrogen storage materials, strip temperature, thickness disturbance, rigidity of the mill, mill speed and so affect the final thickness of strip, and some of these factors change over time.
We can use linear relationship to describe the characteristics of the rolling mill units Fr=M(Ha-S0) (1) M is a constant, material properties are Fr=F(M, σ, μ, R')+Fe (2) M is the average of compressive stress (N/m2), σ is the average of tensile stress(N/m2), μ is a friction coefficient of the roll and strip, R 'is the deformed roll radius (m) and Fe is the output elastic restoring force (N) For system simulation, we can simplify (2) to Fr=Vs(Ha-S0) (3) Vs is a function of V1 Vs=3V0 V1max(2V1max+V1) (4) Because (3) is quadratic, so the intersection of Ha approximate solution is possible.
Neural network model for nonlinear control systems Neural internal model control is a very important property: if the given object and the controller input - output is stable, and it has the object of a precise model, then the closed-loop system will also be input output stability.
Comparison of simulation results On the neural internal model control simulation, and compared with the conventional PI control for comparison see Table 1, the results of control internal model control, neural control has better properties than PI.
Analysis and control of the strip rolling process The rolling of the strip is a very complex process, which will be subject to the interference of a number of factors, input and uniformity of the liquid hydrogen storage materials, strip temperature, thickness disturbance, rigidity of the mill, mill speed and so affect the final thickness of strip, and some of these factors change over time.
We can use linear relationship to describe the characteristics of the rolling mill units Fr=M(Ha-S0) (1) M is a constant, material properties are Fr=F(M, σ, μ, R')+Fe (2) M is the average of compressive stress (N/m2), σ is the average of tensile stress(N/m2), μ is a friction coefficient of the roll and strip, R 'is the deformed roll radius (m) and Fe is the output elastic restoring force (N) For system simulation, we can simplify (2) to Fr=Vs(Ha-S0) (3) Vs is a function of V1 Vs=3V0 V1max(2V1max+V1) (4) Because (3) is quadratic, so the intersection of Ha approximate solution is possible.
Neural network model for nonlinear control systems Neural internal model control is a very important property: if the given object and the controller input - output is stable, and it has the object of a precise model, then the closed-loop system will also be input output stability.
Comparison of simulation results On the neural internal model control simulation, and compared with the conventional PI control for comparison see Table 1, the results of control internal model control, neural control has better properties than PI.
Online since: October 2008
Authors: Ji Xiong Han, Yong Ching Chen, Vijay K. Vasudevan
Nanoscale Alumina-Reinforced Aluminum Matrix Composites:
Microstructure and Mechanical Properties
Jixiong Han.1,a Yong-Ching Chen2,b and Vijay K.
Tensile Properties and Strengthening Mechanisms.
Comparison of Properties with Previous Reports on Al-Matrix Composites.
Although the tensile properties of these composites are affected by a number of concurrent and mutually interactive influences, several insights can be drawn from the data.
In this context, the microstructure and mechanical properties of a 2024 Al matrix-nanoscale Al2O3 reinforced DSC composite has been studied and the results will be presented in a forthcoming publication.
Tensile Properties and Strengthening Mechanisms.
Comparison of Properties with Previous Reports on Al-Matrix Composites.
Although the tensile properties of these composites are affected by a number of concurrent and mutually interactive influences, several insights can be drawn from the data.
In this context, the microstructure and mechanical properties of a 2024 Al matrix-nanoscale Al2O3 reinforced DSC composite has been studied and the results will be presented in a forthcoming publication.