Search results

It is found that the viscoelastic properties of rubber have a strong influence on the hysteresis component of friction.
Furthermore, it has been found that both adhesion and deformation losses are directly related to the viscoelastic properties of the rubber.
Since rubber has temperature dependent material properties such a thermal analysis may play a very important role in the understanding of real friction behavior.
Surface roughness affects both the size of the real contact area and the contact pressure distribution.
It can be concluded that the viscoelastic properties of rubber have a strong effect on the hysteresis friction.

Meanwhile it was discussed that quality characteristics of pavement concrete was changed with main construction factors included milepost distance, section distribution, half-side spatial position, construction time and other environment.
Furthermore, a discussion on the factors affecting the concrete quality and the methods promoting the concrete was presented.
It was produced by New Century Cement Co., Ltd in Guixi Country of Jiangxi Province, and its properties were expressed in Table 1.
Table 1 Main properties of the cement Fineness[80μm sieve residue wt %] Stability Setting time[min] Flexural strength[MPa] Compression strength[MPa] Initial Final 3d 28d 3d 28d 3.6 Qualified 58 465 4.2 7.9 18.6 46.9 River sand taken as fine aggregate with a fineness modulus of 2.9, was sourced from Yiyang sand factory located in Yiyang Country.
Here fcs is defined as the threshold value that the pavement concrete can be predicated to meet works requirement on mechanical property in case of flexural strength above it, and the fcs is obtained from equation (1).

The geometry of aluminium can affect the surface area of aluminium [7].
One of the factors that can affect the yield of hydrogen production is the dislocation density of the aluminum structure.
Kazeminezhad, “The effect of direct- and cross-rolling on mechanical properties and microstructure of severely deformed aluminum,” J.
Das, “Microstructures and tensile properties of commercial purity aluminium alloy AA1235 under different annealing conditions,” Mater.
Wang, “Microstructure and Mechanical Properties of AA1235 Aluminum Foil Stocks Produced Directly from Electrolytic Aluminum Melt,” Metall.

Many researchers concluded that the main factor affecting PM emission is the fuel oxygen content.
Table 2 summarizes the detail properties of the test fuels.
Properties of the fuels.
Properties Diesel B20 B20 E5 B20 E10 B20 E15 B20 E20 Flash point (°C) 70 110 43 48 45 49 Viscosity (mm²/s) 4.24 3.07 3.08 3.09 3.28 3.63 Density (kg/m³) 837 845 843 842 844 843 Cetane number 50 41.2 41.7 42.6 43.4 44.2 The engine was controlled by a Dynalec control to increase and decrease the engine speed.
Sarofim, "Combustion aerosols: factors governing their size and composition and implications to human health," Journal of the Air & Waste Management Association, vol. 50, pp. 1565-1618, 2000

The preliminary results indicate that the flutter speed can be affected by the passive control, both in its mechanical aspect as electrical.
The piezoelectric element used is the PZT G1195, whose electrical properties are shown in the Table 1.
The typical section’s properties, for the initial configuration can be found in Table 2.
Table 1: Electromechanical properties of the PZT G195 piezoelectric patch.
Piezoelectric patch PZT G1195 69 7700 18,1 1,6e-6 2,68e-9 Table 2: Typical section’s mechanical properties for the initial configuration.

Make containers use fiber concrete to replace the ordinary concrete, will beneficial to improve the mechanical properties of concrete[5].
The basic assumptions of carbonized life analysis Actually, the process of concrete carbonation is very complex, which should be appropriately simplified on the basis of meeting engineering demand and considering the main factors affecting the carbonation of concrete` in order to design the parameters of model test.
(14) Generally, The concrete carbonation speed is directly proportional to the square root of the CO2 concentration： (15) Where: kc is CO2 concentration affect coefficient; kc =0.742-0.224lgC.
[2] Z.D.Wang, Research and Evaluation on the Deteriotation of Concrete Subject to Multi-factor, China building materials academy,Beijing, 2010
[8] X.M.Wan, Deterioration Mechanisms of Reinforced Concrete Structures under Combined Mechanical and Environmental Action, Xi’an University of Architecture & Technolog, 2011

Vehicle handling stability is an important factor of vehicle active safety [1].
In fact, there are many nonlinear factors affect vehicle performances.
This shows that the higher the speed is the more obvious the tire non-linear characteristics affect.
Affected by tire nonlinear characteristics the carriages roll angle will go through a long time to tend to a stable value.
[6] Zhao You-qun, Yin Hao, Zhang Gui-xia: Mechanical Science and Technology Vol. 24(2005), p. 1138.

As structure is an important bearing component, its performance directly affects the life of the system.
Introduction Sheet metal as the main support part for system, as it accounts for a large proportion in the system, its performance directly affects the life of the system.
Since the unit is divided into a variety of shapes and sizes, it adapts to the complex geometries, material properties and boundary conditions[2].
Structure material selection is Al7075; density is 2810 kg/m3; the yield strength is 455 Mpa; safety factor is 1.5; allowable stress is 303 Mpa; the maximum deformation amount is not more than 1mm; elastic modulus is 71700 Mpa; poisson's ratio is 0.33.
Modal is the natural vibration characteristics of the mechanical structure.

Dambatta4,f 1Faculty of Mechanical and Automotive Engineering Technology, Universiti Malaysia Pahang, 26600 Pekan, Pahang, Malaysia 2Faculty of Technical and Vocational, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim, Perak, Malaysia 3Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Padang, 25131, Air Tawar Padang, Sumatera Barat, Indonesia 4Department of Mechanical Engineering, Faculty of Engineering, Kano University of Science and Technology Wudil, P.
Many factors affect load transfer at the bone implant interface such as the type of loading, material properties of the implant and prosthesis, implant geometry, surface structure, implant design quality (diameter and length) and quantity of surrounding bone, and nature of bone implant interface [3, 4].
However, a key factor for the success of a dental implant is the particular way of stresses that are transferred from implant to the surrounding bone.
The material properties of the implant system and the mandibular bone used to setup ANSYS for analysis are shown in Table 1.
References [1] Mas Ayu, H., et al., Improving biocompatibility of cobalt based alloy using chemical etching and mechanical treatment.

Domestic and international researches find that: the vital factors affecting the reliability of electrical connectors include temperature, humidity, manufacturing processes, material properties, etc.
Low temperature has the particularly impact on the reliability of electrical connectors: 1) the rubber and plastic become brittle, lose strength and the anti-shock loading capability; 2) the shrinkage of material and the variation of the gap between parts emerges, resulting in the mechanical action fault; 3) the stress corrosion causes the cracking of the contact surface; 4) the changes of the resistance and capacitance affect the performance and reliability of electrical systems, etc [2].
The followings are the fundamental factors concerning the test.
The length of test time not only affects the cost and efficiency, but also affects the authenticity of test results.