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Investigation of Thermal Conditions of the Aluminothermic Welding and their Influence on the Structure and Properties of Metal Rails A.D.
The article is devoted to the assessment of temperature influence effect on the mechanical properties and structure of weld metal and welded rails.
Investigations aimed at improving mechanical properties of welded joints due to the doping of a thermite powder are given in [2,3].
This work is devoted to the assessment of temperature influence effect on the mechanical properties and structure of weld metal and welded rails.
In the study of the thermal conditions influence of the welding process on the structure and mechanical properties of the weld metal and heat affected zones, microstructural studies and measurement of the rail head hardness of the welded joint were carried out.

The modulus of elasticity strongly depends on the the environmental factors, and as the modulus changes, resulting in the change of pavement susceptibility to mechanical characteristics [1].
Therefore, assuming a changeless surface layer’s modulus as the depth increases may be misleading during the traditional design or analysis of the mechanical properties of asphalt concrete pavements [4].
In order to know about the influence of surface layer's modulus changed as non-uniformity gradient on the mechanical characteristics of asphalt concrete pavements, this paper assumed the different changes on the modulus of surface layer with different gradient and then researches the mechanical properties of asphalt concrete pavements by using the finite-element method.
Stress intensity factors variations with different modulus of surface layer are shown in Fig. 4 and Fig. 5.
Fig. 4 variation of the stress intensity factor KⅠ with modulus of surface layer Fig. 5 variation of the stress intensity factor KⅡ with modulus of surface layer Conclusions This paper assumes the different changes on the modulus of surface layer with non-uniformity gradient, and then researches the mechanical properties of asphalt concrete pavements with different modulus of surface layer by using the finite-element method.

According to 35t/h biomass grate boiler which is running actually, the factors which affect exhaust gas temperature are analyzed and summarized to help solving the problem of higher exhaust gas temperature.
Fig 2 Fuel Biomass boiler exhaust gas temperature influence factors analysis 1 The impact of fuel property on exhaust gas temperature Water content, ash, volatile and low heating value of biomass fuel has a direct impact on boiler exhaust gas temperature
Exhaust gas temperature increases by about 0.6℃ when convert water increases by 0.1[1]. 2 The impact of air leakage on exhaust gas temperature Air leakage is one of the main factors which affect on exhaust gas temperature.
And then, the factors which affect exhaust gas temperature are analyzed and summarized, fuel property and air leakage have a greater impact on exhaust gas temperature.
Many factors which affect boiler exhaust gas temperature are not isolated, there is a certain relationship between them, and they are coupling.

Influence of Anisotropic Properties upon Stress Intensity Factors under Biaxial Stress Akira Shimamoto1, a, Hiroshi Ohkawara1, a and Jeonghwan Nam 2, b 1 Saitama Institute of Technology, 1690, Fusaiji, Fukaya, Saitama 369-0293, Japan 2 Hi-tech Mechanical Design Research Center, Yeungnam University, Kyoungbuk, Korea a shimamot@sit.ac.jp, bnam@jj.ac.kr Keywords: Anisotropy, Stress Intensity Factor, Experimental Stress Analysis, Fracture Mechanics, Biaxiality Ratios Abstract.
In this study, stress intensity factors were investigated and determined by photoelastic and caustics methods to clarify the mechanical behavior of crack tips under various biaxiality ratios.
Caluculation of stress intensity factors Photoelasticity.
Conclusions The stress intensity factors KI, KII, of PC band plates with isotropic and anisotropic properties were determined by photoelastic and caustics methods under biaxial stress conditions.
When the notch angle θ is 0ﾟ under biaxial load conditions, there is no influence from either isotropic or anisotropic properties, only KI is affected. 2.

Mechanical Properties of Concrete after High Temperature Cycling Test Overview.
This causes the peak stress of concrete to decrease as the number of cycles increases, and the mechanical properties of concrete gradually deteriorate.
Mechanical properties of PVA Fiber-Reinforced Concrete after High Temperature Test Overview.
The properties of PVA fibers are shown in Table 3.
From the experimental results of the thermal conductivity of bentonite, it can be seen that the main factors affecting its thermal conductivity are actual water content, actual dry density and porosity.

Factors influencing the machining surface layer of physical and mechanical properties.
Plastic deformation and heat is more serious than the blade cutting, so after cutting and grinding processing surface layer the three physical and mechanical properties above will change a lot.
The main factors impact cold hardening.
Mechanical processing surface quality affects the performance of machine use [J].
Mechanical processing surface quality and influence factors analysis [J].

The dynamic mechanical properties of the blends of polyacrylic ester and various nano-fillers and the effect of nano-filler on the damping properties of polyacrylic ester damping paint were studied by using dynamic mechanical analysis (DMA) in this paper.
When the nano-filler was filled into damping paint, it will affect the damping property for the paint.
So, the dynamic mechanical properties of the blends of polyacrylic ester and various nano-fillers and the effect of nano-filler on the damping properties of polyacrylic ester damping paint were studied by dynamic mechanical analysis (DMA) in this paper.
The sample’s dynamic mechanical properties such as loss tangent was obtained through a NETZSCH DMA 242C type dynamic mechanical analysis tester in the temperature ranging from -60 °C to 140 °C with a heating rate of 3 °C/min and a frequency of 2.5 Hz.
Comparing with the pure polyacrylic ester, when adding nano-polyacrylic ester rubber powder to the polyacrylic ester latex, the peak value of loss factor for the blend increased evidently, which indicated that the damping properties for the blend increased, and the damping properties increased with the content increase of the nano-polyacrylic ester rubber powder.

Eight control factors were designed in an L18 orthogonal array experiment, and the effects of the control parameters on the surface properties were critically evaluated in the experiments.
Statistical Variation Estimation affecting Coating Characteristics Table 1 Selecting significantly factors from analysis of variance Symbol Sum of Squares Degree of Freedom Mean square F-test Contribution percent A 0.089 1.0 0.089 3.301 1.80 B 0.243 2.0 0.121 4.504 24.98 C 0.602 2.0 0.301 11.167 2.03 D 1.213 2.0 0.607 22.489 2.37 E 0.324 2.0 0.162 6.004 20.49 F 1.405 2.0 0.702 26.039 10.17 G 0.714 2.0 0.357 13.228 36.11 H 1.540 2.0 0.770 28.550 1.17 Error 0.054 2.0 0.027 1.000 0.89 Total 6.185 17.0 100.00 The analysis of variance explores the control factors that significantly affect the quality characteristics of integrated properties.
It can be found that accelerating voltage, stand-off distance, powder feeder rate and carrier gas accounting for nearly the 91.75% of total variance affecting the integrated properties.
The experimental results identify that accelerating voltage, stand-off distance, powder feeder rate and carrier gas are the main parameters among the eight control factors that significantly influence the surface properties in plasma sprayed coatings, in which these factors account for nearly 91.75% the experimental variation.
By applying significant factors from analysis of variance in the grey relational analysis, the surface properties could be effectively improved in this study.

Structural dimensions are the major factors affecting mechanical strength and manufacturing cost of diaphragm chamber.
Mechanical strength of diaphragm chamber was checked in the light of ASMEVIII-2.
Diaphragm chamber is connected with diaphragm chamber covers, suction valves and discharge valves in fluid end, so we should fully consider the fluid pressure, pre-tightening force of bolts and other factors during designing process.
The diaphragm chamber is made of alloy steel ZG20Mn, material properties of ZG20Mn are as follows: tensile strength (σb) is 510MPa, yield strength (σs) is 295MPa.
Fig. 3 Von Mises stress and displacement distribution graphs of diaphragm chamber Fig. 4 Stress evaluation paths of diaphragm chamber On the basis of stress generation reasons, stress concentration regions and stress properties, stresses of pressure vessel can be classified into broad categories as primary general membrane stress (Pm), primary local membrane stress (PL), primary bending stress (Pb) and secondary stress (Q)[2].

This article focuses on the finite element method-based bridge vertical plate non-ballasted track CWR mechanical properties.
So it is necessary to analyze the mechanical properties of CWR.
Under the conditions of friction coefficient of the sliding layer as 0.1, 0.3, 0.5, conduct mechanical properties analysis.
Bridge Vertical Line Mechanical Properties, Even Seamless Analysis of Slab Track [J].
Theory and Mechanical Properties of High-speed Rail RPC Slab Track Design Studies [D].