Search results

Introduction Properties that describe crack initiation and propagation, under variable load, are the most important for the exploitation safety of welded structures.
Fatigue cracks initiation on smooth and homogenous shapes, due to the local stress concentration on inevitable constructional crossings and cross-section changes, can’t be described with the simple dependences of load, stress, material properties and cross-section dimension.
The choice was made according to the base material properties and thickness and the chosen welding procedure [4], according to the ACRONI Jesenice catalogue recommendations.
The mechanical properties and the chemical composition of the delivered sheet metal and the chosen electrode are given in Table 1 [4].
Mechanical properties and chemical composition of Nionikral-70 and Tenacito-75 Batch Nionikral-70 Testing direction Yield strength, Rp0,2, [MPa], min.

Wang studied the performance of textile fabric, finding that the fabric weight affects the breaking strength of textile fabric. [1] Wang Lijun and Yuan Guanluo studied on the relationship between physical properties of the sewing thread and the seam quality. [2] They found that seam density is one of the reasons leading to the change of physical properties of sewing thread.
The data is processed by rang analysis to understand the influence between 3 factors and breaking strength.
It is easily concluded that fabric weight is the dominating factor to affect the breaking strength of carrying-belt seams.
(2) The fabric weight is the dominating factor which affects the breaking strength of carrying-belt seams
[5] Li Zuopan and Chu Caiyuan: Investigation of Mechanical Properties Simulation and its Application for Nonwoven Fabrics, Journal of China Textile University, Vol. 24(1998), p.2 [6] Azita Asayesh and Ali A.

The literature [4] study that different mixing amount of carbon fiber has effect on the mechanical properties of concrete.
It can draw up the appropriate conclusions, which is carbon fiber can be effective in improving the mechanical properties of concrete.
On Mechanical properties and Micro Structure of Short Carbon Fiber Concrete Flexural Components[D].kunming University of Science and Technology.2009 [5] Understanding of Properties and the Mechanism of Short Carbon Fiber High-performance Concrete [J].
Journal of Fuzhou University(Natural Science Edition) . 2006,（05）,739-744 [10] Ke Kaizhan, Zhou Ruizhong, Researches on mechanical properties of carbon fiber reactive powder concrete[J].
Study on The Fracture Properties of Carbon Fiber Reinforced Concrete[D].

This may be contributed by uneven distribution of pressure load, thus affecting the particles packing and properties of final product.
The addition of TiO2 and Cr2O3 hinder the grain growth of Al2O3 during sintering process, thus contribute to the improvement of ZTA’s mechanical properties [18,19].
The improvement in particles packing due to higher pressure influenced the mechanical properties.
Chevalier, Elaboration of alumina-zirconia composites: Role of the zirconia content on the microstructure and mechanical properties, Materials 6.5 (2013) 2090–2102
Rashid, Mechanical and microstructural properties of TiO2 doped zirconia toughened alumina (ZTA) ceramic composites at different TiO2 contents, 11 (2015) 8–12

Table 1 Magnesium alloy of thermal conductivity Beijing Nonferrous Metal Research Institute developed systems tensile strength /MPa yield strength/MPa thermal conductivity /W·(m·K)-1 Mg-Zn-Si 265~380 210~355 120 Mg-Zn-Zr-Ag-RE 340 310 120 Mg-Zn-Cu-Mn-Ag 340 320 120 Mg-Ag-Zr-RE 350 300 120 Factors affecting the thermal conductivity performance magnesium alloy ZHANG Shenghua[9] studied the effects of heat treatment system for Al-Mg-Si-RE-B tissue properties of the alloy.
Based on the above literature survey, the factors that affect the movement of electrons and phonons will affect the heat transfer properties of magnesium alloys, studies have shown that α-Mg alloy matrix elements in the solid solution heat conduction process will become scattered electrons and phonons Movement center, thereby reducing the mean free path of electrons and phonons movement, will directly lead alloy thermal conductivity and thermal diffusivity decreases.
This is the most important factor affecting magnesium alloy thermal conductivity and thermal diffusivity size.
Effect of RE on magnesium alloy’s thermal conductivity performance Magnesium alloy to give high priority based on their excellent mechanical properties and high temperature oxidation resistance, but less study of its thermal properties.
Thermal properties of Mg-11Y-5Gd-2Zn-0.5Zr(wt.%)alloy[J].

Introduction Classical surface roughness parameters obtained on atomic force microscopy (AFM) images are frequently used as a typical measure of mechanical surface properties in every application field where the surface structure is known to affect the observed or utilized phenomena.
Their dependence on the image properties (e.g. density of scan points [2] or background correction [3]) is also discussed.
The localization factor was introduced in our previous work as a parameter to quantitatively characterize surface structures [4].
Hence the application of this novel parameter for the quantitative characterization of surfaces could be beneficial in all of the areas dealing with mechanical surface properties as covered by material science.
Figure 5 presents the localization factor values obtained on the images.

In order to improve mechanical properties of hydroxyapatite it is doped with magnesium.
A category of bioceramics have good mechanical properties but do not interact with environment which means they are inert.
In order to improve mechanical properties of interest: mechanical strength, hardness, tenacity, wear resistance and some thermal properties, hydroxyapatite is used in combination with ceramic oxides or metals in dispersion.
One of the techniques to improve HA properties is doping it with small amounts of ions greatly affecting mechanical properties of final product, although they are in small amounts (1-5%).
Each of these chemical elements brings advantages and disadvantages to mechanical properties [4].

Porous coral structure resembles bone and mechanical properties of bone.
Tissue engineering requires three main components in it: scaffold, cell, and growth factors.
Surface tension is one of the mechanical properties of a liquid.
The size of porosity is affecting cell adhesion.
The higher the porosity value on the scaffold, the better the porosity value affects the mechanical strength of the scaffold is.

Dynamic Response Analysis of Motorcycle Fenders Liu Jun1 Li Liang2 Yancheng Institute of Technology Yancheng 224003, China; liuj@ycit.cn jzlliang@163.com Key Words: Fender；finite element method；modal；Dynamic response Abstract：Motorcycle fender is one of the main components of motorcycle，fender structure directly affected it's comfort and security properties．In this paper, the finite element modeling and dynamic response were analyzed using NX 8.0, and found its natural frequencies and mode shapes.
On the basis of the fender structure modeling on different road with the same speed, this paper investigated the several factors affect the vibration motorcycle and analyzed true fender of the motorcycle and did comparative analysis with the modal analysis results.
We build fender finite element model according to the following principles: (1) The analysis of the finite element model fender should gain on the real structure of simultaneous approximation fender form both the mechanical and geometrical properties, especially from the dynamics of the interpolation approximation
The main conclusions were as follows: (1) we established the finite element model fender and analyzed it's modal; (2) we analyzed it's frequency response analysis in random road situation . we obtained result that the properties of materials mentioned in this article meet analyzes results, and it can be used to produce the fender, our calculation results were similar to the actual theory.
Journal of the Chinese society of mechanical engineers 2008,21(3):265～282 [2] LiuGang，Studyon deformation of titaniumthin- walled part in milling process Journal of Materials Processing Technology Volume 209， Issue 6，19 March 2009：2788~2793 [3] Luo YH, Li LX (2006) Study on isothermal extrusion using the deform.

Magnitudes of these fluctuations are directly connected to the ideality factor and temperature, so monitoring of the n(T) dependence could indicate the changes (degradation) in not only electrical but also in optical properties of the photodiodes. 1.
Furthermore, the area of application of photodetectors is very wide, so the investigation of the temperature induced variations affecting their performance is very important from the environmental protection point of view, also.
Main parameter that could be extracted from I-V data is the ideality factor (n), a direct indicator of the output parameter dependence on the electrical transport properties of the junction [2-5].
In this way, determination of the n(T) dependence could indicate the changes (degradation) not only in electrical but in optical properties of the photodiodes as well.
Also, voltage dependent fundamental properties such as saturation current and shunt and series resistance, could be the cause of the n(V) dependence.