Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: September 2014
Authors: Xiao Lin Wang, Rong Sheng Qiu, Yong Ming Pan
The design of dynamic mechanical feeding system mainly considers two kinds of forms: One uses the linear guide way and a platform to realize intermittent feeding.
Meanwhile, the vibration problems generated by the frictional resistance will affect the measurement accuracy.
And improve the rigidity of the system can reduce the vibration and eliminate the individual impact factor’s influence on the stability of measurement process [9].
Friction is not the intrinsic material properties, but the response of a rubbing pair; the same object in different rubbing pair show different friction.
If considering these aspects only, all the platforms are feasible, but there are other factors should be considered.
Meanwhile, the vibration problems generated by the frictional resistance will affect the measurement accuracy.
And improve the rigidity of the system can reduce the vibration and eliminate the individual impact factor’s influence on the stability of measurement process [9].
Friction is not the intrinsic material properties, but the response of a rubbing pair; the same object in different rubbing pair show different friction.
If considering these aspects only, all the platforms are feasible, but there are other factors should be considered.
Online since: November 2014
Authors: Lei Gao
Intelligent distributed power distribution system has the function of UPS, EPS, stabilized voltage, power factor compensation and transformer isolation at the same time.
Its optical properties and energy saving effect are better than the light now often used.
Without affecting the safe operation of traffic, making full use of that clean energy is also a new and great economic application field
(2) Wind-solar hybrid power generation Wind and solar energy both are renewable energy, and both subject to various factors such as season, climate, geography, weather, and so on.
(3) Vibration power generation Bridge or road mechanical vibrations caused by rolling of vehicle contain enormous energy.
Its optical properties and energy saving effect are better than the light now often used.
Without affecting the safe operation of traffic, making full use of that clean energy is also a new and great economic application field
(2) Wind-solar hybrid power generation Wind and solar energy both are renewable energy, and both subject to various factors such as season, climate, geography, weather, and so on.
(3) Vibration power generation Bridge or road mechanical vibrations caused by rolling of vehicle contain enormous energy.
Online since: August 2004
Authors: Brian Gleeson, Bing Tao Li
In order to exhibit good protective properties, the
scale should be slow-growing, very stable, continuous, and adherent [1].
All of these factors are interdependent and need to be understood for accurate lifetime prediction of oxidation resistance. 0 20 40 60 80 100 120 140 -100 -80 -60 -40 -20 0 X 617 45TM 214 601 800 HR-160 800HT D-205 Weight Change (mg/cm 2 ) Oxidation Cycles Fig. 1.
The commercial chromia-forming alloys usually contain minor elements, such as Mn, Si, Al, and Ti for the purpose of metallurgical stability and improved mechanical properties [17].
Although manganese has little influence on the structure and properties of Fe-Ni-Cr alloys, it can influence scaling behavior by reacting with the Cr2O3 to form MnCr2O4 spinel at the scale surface.
Variation in major alloying elements can also result in significantly different subsurface chromium depletion behavior, thus ultimately affecting cyclic oxidation behavior.
All of these factors are interdependent and need to be understood for accurate lifetime prediction of oxidation resistance. 0 20 40 60 80 100 120 140 -100 -80 -60 -40 -20 0 X 617 45TM 214 601 800 HR-160 800HT D-205 Weight Change (mg/cm 2 ) Oxidation Cycles Fig. 1.
The commercial chromia-forming alloys usually contain minor elements, such as Mn, Si, Al, and Ti for the purpose of metallurgical stability and improved mechanical properties [17].
Although manganese has little influence on the structure and properties of Fe-Ni-Cr alloys, it can influence scaling behavior by reacting with the Cr2O3 to form MnCr2O4 spinel at the scale surface.
Variation in major alloying elements can also result in significantly different subsurface chromium depletion behavior, thus ultimately affecting cyclic oxidation behavior.
Online since: March 2007
Authors: Pablo Rodriguez-Calvillo, Yvan Houbaert, Tanya Ros-Yáñez, R. Colas
-%Si) is important for the electrical industry because of
its magnetic properties.
Such combination of properties allow for achieving low electrical losses, due to Eddy current and hysteresis cycles, especially at high frequencies [1].
Compression tests at room temperature (RT) were carried out in order to study the deformation behavior in function of the previous thermomechanical treatment: cooling rate after hot rolling, effect of the annealing temperature and effect of delay at room temperature (time between the end of the cooling down to room temperature and the start of the cold deformation) on mechanical properties.
Samples with higher Si content can show a retardation factor of 55 compared to low silicon samples at 800°C [5].
Bailey: ASM Metals Handbook, Vol. 8 (Mechanical Testing), (9th Ed., ASM, Metals Park, OH 1985 p.137) [9] T.
Such combination of properties allow for achieving low electrical losses, due to Eddy current and hysteresis cycles, especially at high frequencies [1].
Compression tests at room temperature (RT) were carried out in order to study the deformation behavior in function of the previous thermomechanical treatment: cooling rate after hot rolling, effect of the annealing temperature and effect of delay at room temperature (time between the end of the cooling down to room temperature and the start of the cold deformation) on mechanical properties.
Samples with higher Si content can show a retardation factor of 55 compared to low silicon samples at 800°C [5].
Bailey: ASM Metals Handbook, Vol. 8 (Mechanical Testing), (9th Ed., ASM, Metals Park, OH 1985 p.137) [9] T.
Online since: May 2013
Authors: Li Hua Wang, Guang Wei Liu, An Ning Huang
Analysis on Critical Speeds of the Rail Vehicle Based on SIMPACK
Lihua Wang a, Anning Huangb and Guangwei Liuc
Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province 650093, P.R.
In order to figure out the dynamic characteristics of the rail vehicle, the coupling factors between the vehicle and track were considered [1].
Critical speeds are affected by the vertical and cross-level irregularities mainly.
The vertical irregularity Sv(ω) and alignment irregularity Sa(ω) are (1) (2) Where, Sv(ω) and Sa(ω) are vertical and alignment irregularity power spectral densities, cm2×m /rad, ω and ωc are frequency and cut-off frequency seperately, Aa and Av are parameters which taken irregularity amplitude, v is the speed of vehicle, k is factor, and generally it is 0.25.
Otherwise, if the real parts of eigenvalues are negative, the he vibration of the system will declined and take on convergence properties.
In order to figure out the dynamic characteristics of the rail vehicle, the coupling factors between the vehicle and track were considered [1].
Critical speeds are affected by the vertical and cross-level irregularities mainly.
The vertical irregularity Sv(ω) and alignment irregularity Sa(ω) are (1) (2) Where, Sv(ω) and Sa(ω) are vertical and alignment irregularity power spectral densities, cm2×m /rad, ω and ωc are frequency and cut-off frequency seperately, Aa and Av are parameters which taken irregularity amplitude, v is the speed of vehicle, k is factor, and generally it is 0.25.
Otherwise, if the real parts of eigenvalues are negative, the he vibration of the system will declined and take on convergence properties.
Online since: August 2024
Authors: Kalakonda Saidaiah, Newton Kumar Singh, P. Sudhakar Rao
The insulating property of the dielectric fluid.
Surface roughness, TWR and MRR Taguci By taking into account the impact of different input factors on specific performance metrics, EDM performance measurements are optimized.
TWR increases significantly as the amount of B4C rises, although graphite reinforcing has no abrasive properties. 39 Mumtaz Rizwee, et, al Aluminum alloy 7075 (Al-7075), Boron carbide (B4C), Servo voltage (V) Spark on time (µs) and Pulse current (A) MRR, Taguchi This investigation shows that the dominating input parameter during the Al/B4C/Gr MMC's EDM has a significant impact on MMR.
In International Journal of Mechanical Engineering (Vol. 7, Issue 5)
American Society of Mechanical Engineers (ASME)
Surface roughness, TWR and MRR Taguci By taking into account the impact of different input factors on specific performance metrics, EDM performance measurements are optimized.
TWR increases significantly as the amount of B4C rises, although graphite reinforcing has no abrasive properties. 39 Mumtaz Rizwee, et, al Aluminum alloy 7075 (Al-7075), Boron carbide (B4C), Servo voltage (V) Spark on time (µs) and Pulse current (A) MRR, Taguchi This investigation shows that the dominating input parameter during the Al/B4C/Gr MMC's EDM has a significant impact on MMR.
In International Journal of Mechanical Engineering (Vol. 7, Issue 5)
American Society of Mechanical Engineers (ASME)
Online since: October 2022
Authors: Nabaa Mohammed Bader, Khudheyer S. Mushatet
[4, 5] looked into the heat transfer properties of a rectangular duct with a compact delta-wing and winglet pair.
Gentry and Jacobi [16,17] attempted to evaluate the enhancement properties of delta wing vortex generators in a smooth duct flow.
However, discontinuous ribs had the highest friction factor values, whereas continuous ribs had the minimal performance factor among the cases examined.
The winglet height ratio (e/H) and varying solar irradiance are considered major factors influencing the thermal performance evaluation of the solar air dryer.
The cause might be related to mechanical power superiority, which is necessary to overcome frictional resistance in the duct.
Gentry and Jacobi [16,17] attempted to evaluate the enhancement properties of delta wing vortex generators in a smooth duct flow.
However, discontinuous ribs had the highest friction factor values, whereas continuous ribs had the minimal performance factor among the cases examined.
The winglet height ratio (e/H) and varying solar irradiance are considered major factors influencing the thermal performance evaluation of the solar air dryer.
The cause might be related to mechanical power superiority, which is necessary to overcome frictional resistance in the duct.
Online since: October 2012
Authors: Jian Long Zheng, Xiao Chen
Lu applied finite element numerical simulation to study the asphalt mixture viscoelasticplastic mechanical deformation properties, and the application of pavement performance evaluation and permanent deformation of asphalt layer are successful obtained [3].
Khaled Anwar Kandil studied the effects of gradation characteristic and material properties on the asphalt mixture compaction by indoor and field tests, and the established two compaction model of indoor and outdoor to the evaluate compaction quality[4].
Thus, gradations of asphalt mixture, compaction, quality control method and theory have significant impacts on asphalt mixture compaction properties.
Asphalt Mixture Compaction Deformation Theory 2.1 Dense deformation principle Hot asphalt mixture comprises asphalt binder with heat flux properties, the gravel aggregate supported by a framework and a kind of gas.
And the compaction thickness data can be converted as follows: (36) Whereis compaction layer thickness after roller N times ; theory layer thickness for rolled thickness infinite times ;is the rolled layer thickness initially ( mixture paving thickness ); N rolled times; influence factors rolling deformation speed.
Khaled Anwar Kandil studied the effects of gradation characteristic and material properties on the asphalt mixture compaction by indoor and field tests, and the established two compaction model of indoor and outdoor to the evaluate compaction quality[4].
Thus, gradations of asphalt mixture, compaction, quality control method and theory have significant impacts on asphalt mixture compaction properties.
Asphalt Mixture Compaction Deformation Theory 2.1 Dense deformation principle Hot asphalt mixture comprises asphalt binder with heat flux properties, the gravel aggregate supported by a framework and a kind of gas.
And the compaction thickness data can be converted as follows: (36) Whereis compaction layer thickness after roller N times ; theory layer thickness for rolled thickness infinite times ;is the rolled layer thickness initially ( mixture paving thickness ); N rolled times; influence factors rolling deformation speed.
Online since: May 2023
Authors: Danny Tupayachy-Quispe, Jonathan Almirón, Diana Mamani-Rivera, Yosheff Ortiz-Valdivia, Francisco Velasco
This acid is also widely used in the biomedical field due to its antibacterial and low toxicity properties [7, 8].
One of them is polyvinyl alcohol (PVA), used to obtain nanofibers in biomedical applications due to its mechanical properties and its known characteristics of biodegradability, biocompatibility and water solubility [9,10].
Experimental investigation of the properties of electrospun nanofibers for potential medical application.
Factors that interact with the antibacterial action of thyme essential oil and its active constituents.
Electrospinning, mechanical properties, and cell behavior study of chitosan/PVA nanofibers.
One of them is polyvinyl alcohol (PVA), used to obtain nanofibers in biomedical applications due to its mechanical properties and its known characteristics of biodegradability, biocompatibility and water solubility [9,10].
Experimental investigation of the properties of electrospun nanofibers for potential medical application.
Factors that interact with the antibacterial action of thyme essential oil and its active constituents.
Electrospinning, mechanical properties, and cell behavior study of chitosan/PVA nanofibers.
Online since: May 2019
Authors: Preda Pichayapan, Peerapong Jitsangiam, Phittayoot Chaleonpan, Pongsakorn Wongchana
The aggregate properties are shown in Table 1 below.
It shows the result of aggregate properties under a specification of DOH requirements.
Field investigation of factors affecting skid resistance variations in asphalt pavements.
Influence of engineering properties on Polished Stone Value (PSV): A case study on basic igneous rocks from Serbia.
BS EN ISO 1097-08, Test for mechanical and physical properties of aggregates – Part 8, BSI, London, UK.
It shows the result of aggregate properties under a specification of DOH requirements.
Field investigation of factors affecting skid resistance variations in asphalt pavements.
Influence of engineering properties on Polished Stone Value (PSV): A case study on basic igneous rocks from Serbia.
BS EN ISO 1097-08, Test for mechanical and physical properties of aggregates – Part 8, BSI, London, UK.