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Online since: September 2019
Authors: Yong Yong He, Yu Tong Hu, Wei Wang
The experimental results showed that the size of the surface texture, compared with that of abrasives, is the main factor which determines the friction coefficient.
For a mechanical system, friction occurs when both surfaces are in contact and a relative displacement happens.
DongJun kim, et al, combined surface texturing and PVD hard coatings to improve tribological properties [12].
Recently, some groups tried to to investigate surface texture with mechanical simulation.
Over the past two decades, a great deal of effort has been made to build a function that can optimize the mechanical properties of materials.
For a mechanical system, friction occurs when both surfaces are in contact and a relative displacement happens.
DongJun kim, et al, combined surface texturing and PVD hard coatings to improve tribological properties [12].
Recently, some groups tried to to investigate surface texture with mechanical simulation.
Over the past two decades, a great deal of effort has been made to build a function that can optimize the mechanical properties of materials.
Online since: June 2008
Authors: Rui Louro, Helena Gouveia, Paulo Brioso
The main factors are the fact that the work detailed in scientific publications often lacks
important information and that some of the research work developed in this field is subject to
confidentiality agreements that prevents its disclosure.
The tool components were subject to a temper treatment designed to improve the mechanical properties of the tools.
Furthermore they were also subjected to an ionic nitriding treatment with the purpose of improving the fatigue properties of the tool and to reduce the aluminium adherence to the tool features, namely the thread.
The most serious weld defects are the ones that affect the interior of the weld, such as the porosity that affects tests 6 and 7 (these internal defects have been highlighted in black).
The tool components were subject to a temper treatment designed to improve the mechanical properties of the tools.
Furthermore they were also subjected to an ionic nitriding treatment with the purpose of improving the fatigue properties of the tool and to reduce the aluminium adherence to the tool features, namely the thread.
The most serious weld defects are the ones that affect the interior of the weld, such as the porosity that affects tests 6 and 7 (these internal defects have been highlighted in black).
Online since: January 2012
Authors: Hong Lae Kim, Nak Soo Kim, Wan Gi Cha
A Study on the Development of Dedicated FEA Tool for Roll Forming of Asymmetrical U-channel
Wan-gi Cha1, a, Hong-lae Kim1,b and Naksoo Kim2,c
1 Sogang University, 1, Sinsu-dong, Mapo-gu, Seoul, Korea.
2 Sogang university, Mechanical engineering, Sogang University, 1, Sinsu-dong, Mapo-gu, Seoul, 121-742, Korea.
Hong et al. [3] developed a roll forming program with kinematically steady-state condition integrated, which allowed for identification of factors affecting roll forming.
Material properties were found by tension test, as shown in Table 1.
Table 1 Material properties Young’s modulus[MPa] 210,000 Poisson’s ratio 0.3 Initial yield stress[MPa] 192.7 Flow stress[MPa] Figure 1 Section profile.
Hong et al. [3] developed a roll forming program with kinematically steady-state condition integrated, which allowed for identification of factors affecting roll forming.
Material properties were found by tension test, as shown in Table 1.
Table 1 Material properties Young’s modulus[MPa] 210,000 Poisson’s ratio 0.3 Initial yield stress[MPa] 192.7 Flow stress[MPa] Figure 1 Section profile.
Online since: January 2013
Authors: Nandy Putra, Ridho Irwansyah, H. Ardiyansya, A. Adiwinata, A. Renaldi, K. Benediktus, Wayan Nata Septiadi
Benediktus
Heat Transfer Laboratory, Department of Mechanical Engineering, University of Indonesia Kampus UI, Depok, 16424, Indonesia.
Thermoelectric refrigerator without heat pipes The experiment was conducted by varying several factors, including the input power, ambient temperature, and cooling load.
Figure 7 shows that the ambient temperature affects the obtained cabin temperature.
Figure 8 shows that the cooling load is one of the factors affecting the degree to which the thermoelectric system can reduce the cabin temperature.
The properties of water that being used in the calculation are density and heat capacity which value are 1.000 kg/m3 and 4.18 kJ/kg respectively.
Thermoelectric refrigerator without heat pipes The experiment was conducted by varying several factors, including the input power, ambient temperature, and cooling load.
Figure 7 shows that the ambient temperature affects the obtained cabin temperature.
Figure 8 shows that the cooling load is one of the factors affecting the degree to which the thermoelectric system can reduce the cabin temperature.
The properties of water that being used in the calculation are density and heat capacity which value are 1.000 kg/m3 and 4.18 kJ/kg respectively.
Online since: January 2018
Authors: Yao Dong Gu, Gusztáv Fekete, Mei Zi Wang, Yang Song
In addition, plantar pressure and horizontal stress are one of the major factors that lead to diabetic foot ulcers [15], the measurement of plantar pressure distribution is also a commonly clinical method in assessing the elevated risk of diabetic foot [16].
The plantar temperature in the process of movement can help us better understand the impact of shoes and environmental factors [22].
Be in running exercise stage, the body metabolizes faster, muscles constantly contract, blood circulation accelerates, continuous foot friction occurs and other factors cause foot temperature to steady increase during movement.
Some studies have revealed that different material of socks would make the human body react differently thus, affecting foot temperature [31].
The effect of environmental temperature on the properties of running shoes.
The plantar temperature in the process of movement can help us better understand the impact of shoes and environmental factors [22].
Be in running exercise stage, the body metabolizes faster, muscles constantly contract, blood circulation accelerates, continuous foot friction occurs and other factors cause foot temperature to steady increase during movement.
Some studies have revealed that different material of socks would make the human body react differently thus, affecting foot temperature [31].
The effect of environmental temperature on the properties of running shoes.
Online since: May 2014
Authors: Khwantri Saengprachatanarug, Saree Wongpichet, Titinai Thienyaem, Taira Eizo, Prakarn Thongrak
In order to maintain a high consistency of billet plating, the harvester discharge mechanism needs to accommodate the physical properties of sugarcane billet of Thai's variety, which vary by breed and harvesting method according to area.
More over, lack of labor for preparing the seed cane causes the delay planting which affect in less germination rate.
However, the metering units of imported billet planters were not compatible with working condition in Thailand to match the breeds and the physical properties of Thai sugarcane billet.
Factors, such as the linear conveying speed and the inclination of the conveyor belts were studied and modeled [2, 8].
To control the property of the sugarcane billets, the bulk density of the billets was checked.
More over, lack of labor for preparing the seed cane causes the delay planting which affect in less germination rate.
However, the metering units of imported billet planters were not compatible with working condition in Thailand to match the breeds and the physical properties of Thai sugarcane billet.
Factors, such as the linear conveying speed and the inclination of the conveyor belts were studied and modeled [2, 8].
To control the property of the sugarcane billets, the bulk density of the billets was checked.
Online since: August 2018
Authors: Santina Di Salvo
Smart surfaces and materials can play a significant role in intelligent, adaptive and responsive envelopes because of these intrinsic properties.
Today, reflection on operational strategies regarding the environmental question, energy efficiency and sustainability is one of the decisive factors for a change in the way of thinking in architecture.
Two main factors emerge that allow us to consider the so-called bio-inspired design approach in a new perspective.
Materials with self-healing properties.
At first, it was thought to add sugar to the mixture, which would have compromised the mechanical properties of the structure.
Today, reflection on operational strategies regarding the environmental question, energy efficiency and sustainability is one of the decisive factors for a change in the way of thinking in architecture.
Two main factors emerge that allow us to consider the so-called bio-inspired design approach in a new perspective.
Materials with self-healing properties.
At first, it was thought to add sugar to the mixture, which would have compromised the mechanical properties of the structure.
Online since: December 2013
Authors: Xiao Jing Ren, Li Ma
Generally, mechanical transmission and drive system have a high requirement to component’s strength and stiffness, the design and layout difficulty, it couldn’t satisfy the power performance of the off-road vehicle, So electricity transmission and drive system are widely demanded, because of its advantages[1].At the same time, electric drive can satisfy rideability and steering performance.
Selection of motor power directly affects the power and economy of vehicle.
The battery is a key factor restricting the development of electric vehicles.
Figure 3 Distance, Speed and accelerated speed Minimum speed and Maximum speed Figure 4 Speed and Time during Figure 5 Gradeability and speed Full load accelerated Table 3 The vehicle dynamic performance simulation results Maximum Speed Maximum Climbing Degree /% 0-to-56Time t/s 8%-Rap Steady speed 32.84 Parameter Optimization The power and economy of vehicle are not only influenced by properties of engine and powertrain parts, but also by the form, parameters and efficiency of engine and transmission system.
The parameters of the electric drive system is optimized in this paper, on the premise of not affecting the power performance and the fuel economy of off-road vehicle become optimal.
Selection of motor power directly affects the power and economy of vehicle.
The battery is a key factor restricting the development of electric vehicles.
Figure 3 Distance, Speed and accelerated speed Minimum speed and Maximum speed Figure 4 Speed and Time during Figure 5 Gradeability and speed Full load accelerated Table 3 The vehicle dynamic performance simulation results Maximum Speed Maximum Climbing Degree /% 0-to-56Time t/s 8%-Rap Steady speed 32.84 Parameter Optimization The power and economy of vehicle are not only influenced by properties of engine and powertrain parts, but also by the form, parameters and efficiency of engine and transmission system.
The parameters of the electric drive system is optimized in this paper, on the premise of not affecting the power performance and the fuel economy of off-road vehicle become optimal.
Online since: January 2017
Authors: Hong Zhi Yue, Xin Wang, Chun Cheng Wei, Zan Zhong Yang
Strontium nitrate, barium nitrate and aluminum nitrate were all analytical reagents and added as additives to affect the crystal morphology of xonotlite.
During hydrothermal reaction the mass ratio of water and solid reactants (W/S) posed a great impact on the properties of products.
The concentrated pellets were apter to be broken by the action of mechanical agitation while the scattered pellets were easily reserved intactly.The increase of the yield of intact pellets would slightly decrease apparent density of the products.
Namely added ions would affect xonotlite fiber morphology and the fiber morphology could affect the apparent density and heat insulation capability of products.
Many factors could affect microstructure of xonotlite particles, such as raw material type and particle size, Si/Ca, W/S, temperature, reaction time, stirring speed and additives.
During hydrothermal reaction the mass ratio of water and solid reactants (W/S) posed a great impact on the properties of products.
The concentrated pellets were apter to be broken by the action of mechanical agitation while the scattered pellets were easily reserved intactly.The increase of the yield of intact pellets would slightly decrease apparent density of the products.
Namely added ions would affect xonotlite fiber morphology and the fiber morphology could affect the apparent density and heat insulation capability of products.
Many factors could affect microstructure of xonotlite particles, such as raw material type and particle size, Si/Ca, W/S, temperature, reaction time, stirring speed and additives.
Online since: September 2020
Authors: Mohamad Hasmaliza, Tuti Katrina Abdullah, Husniyah Aliyah Lutpi
Crystal structure and wave-transparent properties of lithium aluminum silicate glass-ceramics.
Investigation of dielectric properties and microstructure of sintered 13·2Li2O−67·6SiO2−14.49Al2O3− 3·3TiO2−0.4BaO−0.97ZnO glass-ceramics.
The effects of B2O3 on the microstructure and properties of lithium aluminosilicate glass-ceramics for LTCC applications.
Comparison of the mechanical and tribological properties of a sintered low expansion Li2O-Al2O3-SiO2 glass-ceramic and a commercial cooktop plate.
Effect of Melting Times on the Down-Shifting Properties in Ce3+-Doped Oxyfluoride Glass Ceramics for a-Si Solar Cells.
Investigation of dielectric properties and microstructure of sintered 13·2Li2O−67·6SiO2−14.49Al2O3− 3·3TiO2−0.4BaO−0.97ZnO glass-ceramics.
The effects of B2O3 on the microstructure and properties of lithium aluminosilicate glass-ceramics for LTCC applications.
Comparison of the mechanical and tribological properties of a sintered low expansion Li2O-Al2O3-SiO2 glass-ceramic and a commercial cooktop plate.
Effect of Melting Times on the Down-Shifting Properties in Ce3+-Doped Oxyfluoride Glass Ceramics for a-Si Solar Cells.