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The Role of Low Temperature on Mechanical and Fatigue Properties of Different Alloys F.
At each temperature, mechanical properties, σy, σu, E, εr, impact energy absorption curves, and some fatigue properties such as the initiation life, Ni, total life, Nf, and propagation life, Np, as well as the shape of the propagation curve, da/dN-Kmax (Kmax maximum stress intensity factor) were assessed.
This is true for almost all mechanical and fatigue properties in different materials.
Mechanical properties are listed in table 1 and Fig. 1.
The same tendency occurs for general mechanical properties.

Study on Impact Properties of New Hydro-pneumatic Buffer for a Metro Vehicle YiPing Li 1,a 1School of Chemical and Environmental Engineering Shanghai Institute of Technology, Shanghai 201418, China amliyiping@163.com Key Words: railway vehicle; hydro-pneumatic; dynamics model; characteristic curve; dynamic simulation Abstract.
The two buffer using damping rod and throttle damping ring structure, if the damping rod and damping ring buffer is not good for neutral, can lead to buffer cannot reach the expected effect, and even failure [5].The damping hole and the damping ring are the main structure parameters of new hydro-pneumatic buffer, also is the main factor that affects the hydro-pneumatic buffer characteristics curve.
Figure .1 Hydro-pneumatic Buffer Structure Diagram and Calculation Model 1. hit head 2.piston rod 3. gas-liquid isolate piston 4.damping hole 5.damping valve 6.cylinder7.oil cavity a 8. check valve 9. oil cavity a 10.gas chamber Dynamic model of hydro-pneumatic buffer The internal structure of hydro-pneumatic buffer is more complex, many factors affect the dynamics characteristics.
Of course, the ideal hydro-pneumatic buffer curve should be as shown in figure 1, but that in practice due to the impact of changes in oil viscosity, oil formation time and other factors is difficult to achieve.
Dynamic test and simulation to the new model of Hydraulic-Gap Buffer[J].Chinese journal of mechanical engineering, 2006, 42(1)：212-216

Welding sticks H05MnNiMo and H06H1 are developed to improve the corrosion resisting property of the X80 pipeline in submerged arc welding.
And the characteristic and mechanical of the welding seam was discussed.
Since non-equilibrium complicated chemical and physical changes is conducted on the pipeline steel in the process of pipeline welding, deficiencies as the inhomogeneous chemical constituent, the existence of quenched structure, non-uniform mechanical properties, and the different electrochemical corrosion characteristic in the welded joint exist and tend to cause corrosion in the welding joint [6].Thus the corrosion of the joints is the key factors affecting the reliability of the pipeline system, mainly caused by the sulfur medium in crude oil.
It can be deduced from the anti-corrosive alloying principle that the more positive natural corrosion potential of the rare earth, copper and nickel decreases the cathodic polarizability, makes the base mental passivated and finally increases the anti-corrosion property of the alloy [9].
The more positive the potential is, the better the anti-corrosion property is.

Different concentrations of stabilizer addition on the properties of asphalt It can be seen from Figure 4, the addition of stabilizers have greatly improved on the softening point, while a certain decrease of the ductility, and the degree of penetration has little effect.
Figure 3 Penetration with different content of carbon nanotube/SBS modified asphalt Figure 4 Different concentrations of stabilizer addition on the properties of asphalt E.
Optimizing various factors, the best system is established by a carbon nanotube, SBS and stabilizer, the performance of base asphalt or SBS modified bitumen product is greatly improved.
SBS modified asphalt production technology and properties research, (1991)
Dynamic mechanical analysis on shearing and developing procedure of styrene-butadiene-styrene modified asphalt (2005)

This is because the processing of the shafts on CNC lathes introduces a number of technological errors [1-7] that affect the accuracy of mechanical processing.
The development of the manufacturing process for stepped shafts depends significantly on the following factors: the design of the shaft, the geometry of surfaces and the accuracy of their parameters, the interrelation of parameters, and the volume (quantity) of product output.
In addition to the listed factors, the method of obtaining workpiece parts is also of great importance [1-8].
v= CVTm tx Sy KV (1) Where T=60 min, the tool life is assumed, and the general coefficients take into account the factors such as the material requirement, tool strength, etc. [13].
Kp is a general coefficient that includes the machinability of the material, tool properties, and cutting force conditions.

As a result of prolonged exposure to these factors, cracks form in reinforced concrete, which may eventually lead to structural failure.
As is known, the most complete information about the actual strength and other mechanical properties of the material for various types of deformations (tension, compression, bending) is given by laboratory tests of samples using standard destructive methods.
As an indirect characteristic, the values of surface hardness, elastic and plastic deformations of materials, their electromagnetic and acoustic properties can be used.
The second sample was made without the use of fibre, in order to better understand how the presence of polypropylene fibre affects the electrical response.
The scattering of acoustic waves on cracks in concrete affects the attenuation of the electrical response.

Introduction Water-proof of cement concrete bridge and lasting properties of asphalt concrete pavement layer is serious problems faced by road construction field[1].
There shall be better anti-high temperature performance, anti-deformation ability, and sufficient shear properties and binding ability based on construction conditions, use environment and horizontal relationship[5,6].
Successful application of rubber-asphalt in deck water-proof is definitely to effectively bind asphalt concrete layer and deck panel as one whole so as to prolong use life of deck[7,8].Therefore to carry out systematic analysis and research on interlaminar shear properties through indoors test is of important realistic meaning.
Test plan Carry out indoors shearing test to determine horizontal shearing strength of rubber-asphalt as water-proof tack coat of cement concrete deck and systematically research affect on interlaminar shearing strength by factors such as asphalt spray amount (which is thickness of water-proof tack coat), use amount and size of gravel spread, interface situations of cement concrete deck panel, and environmental temperature, and change regulations.
y = -0.0004x2-0.0457x+1.7502 R2=0.9616 (2) Conclusions Systematic analysis and research were carried out on interlaminar shearing performance on water-proof shearing performance of rubber-asphalt based on indoors shearing test to determine all kinds of factors and regulations affecting interlaminar combination stability, with the following main conclusions obtained: ① In order to promote interlaminar shearing effect of water-proof tack coat of rubber-asphalt, it is suggested to spread clean gravel with particle size of 2.36~4.75mm and spreading amount controlled at about 10 kg/m2.

This study aims to examine the effect of the pore on mortar properties with eggshell powder (ESP) as its fine aggregate alternative based on two fundamental properties: microstructural and mechanical strength.
Additionally, concrete with an eggshell composition has acceptable mechanical and radiation shielding properties [32].
Therefore, this study was conducted to examine the properties of the modified mortar with eggshell powder (ESP) as its fine aggregate alternative based on two fundamental properties: microstructural and mechanical strength.
Mechanical properties of hardened mortars.
A variety of factors can influence pore formation.

Hydroxyapatite (HA) is also known for its electret properties [1], piezoelectricity [2-4] and pyroelectricity [3, 5].
While electret properties mean that space charge can be introduced and/or dipoles can be aligned by means of an external electric field [4], piezo and pyroelectric properties indicate that hydroxyapatite is naturally polar, confirming a prediction made from quantum mechanical simulation [6].
Disadvantages are the usually high degree of specialization and the simultaneous existence of several variables affecting the microwave measurement (temperature, density, moisture, structure, etc.) in material measurements [9].
To investigate the properties of HA in a form of coating, namely as a film, the following procedure was employed.
These spectra will be further analysed to determine the dielectric constant of HA at GHz frequencies and how different forms affect these properties.

Safety Range of Braking Force Distribution For general cars, according to the factors like distribution of braking force of front and rear axles, road adhesion coefficient and so on, the following three conditions may occur during braking: 1.
Therefore, the brake force distribution will affect the direction stability of the vehicle when braking.
As the main power unit of electric vehicle, the overcharging seriously affects its cycle life and safety.
By introducing a weight factor c so the vehicle braking recover energy can be limited.
At the same time it meets the mechanical properties and prevents battery overcharging effectively.