Search results

Grind-hardening machining is not only a complex process coupling mechanical, dynamical and thermal effects, but a process containing distinct changes of microstructure and properties of the workpiece grinded surface layer.
In grind-hardening, the special microstructure and mechanical properties of the hardened layer are produced due to the combined effects of a great gradient temperature field and a stress-strain field in the grinding zone.
Besides grinding parameters, other factors influencing the intension and moving speed of the heat source in the grinding wheel-workpiece contact zone can influence the HLD.
These factors include workpiece material, grinding wheel characteristics and surface state, grinding manner, cooling conditions, et al.
Meanwhile, some factors affect and restrict one another and the grind-hardening effects depend on the combined action of all factors [4-7].

It describes that there are other factors which causes why the stiffness of the linear bearing mover system is lower than that of ball bearing.
Based on the direction, the axial cutting force is the dominant factor that determines the product surface roughness.
Roysarkar, Banerjee, Designing machine tool structures with epoxy concrete, Buletin of Rapid prototyping and tolling group of Central Mechanical Engineering Research Institute, Durgapur, 2003
Koci, Assessment of machine tool dynamic properties, Acta Montanistica Slovaca, 8/4 (2003)
Cheng, T, Guideway joint surface properties of heavy machine tools based on the theory of similarity, Research Journal of Applied Sciences, Engineering and Technology, 5/22 (2013) 5230-5236

Notably, the position of the phreatic surface strongly affects stability, and longer dry beach lengths are generally associated with improved the factors of safety [19].
The primary objective is to develop a numerical model to assess how geometric and geotechnical factors particularly slope angle and sludge height affect the factor of safety, thereby informing the design of stable and sustainable retention structures.
Geotechnical properties of both foundation soils and dike materials were derived from in-situ and laboratory investigations. 2.
The progressive increase in sludge height over time allowed consideration of the evolution of its mechanical properties at different filling stages (Table 7).
In conclusion, dikes constructed from this material (with properties summarized in Table 6) and designed with slopes of 2/1 or gentler are stable against sliding prior to filling operations.

There are a lot of uncertainty (random) factors in engineering structure, it’s the inherent properties of all things in nature.
The paper is to study the impact some main factors such as the load , flange diameter, thickness and diameter of the blade on the diamond saw blades using the reliability analysis software ANSYS with Monte Carlo .
In the reliability analysis of structural strength ,structural strength of the limit state function is expressed by the function, and it is expressed with the equation of G=g(x), in which random variable xi is uncertain factors in the actual structure, such as the structural dimensions, material properties, loading and other factors.
The elastic modulus, Poisson ratio and density of the diamond saw blade and agglomeration of diamond are took as input properties of material properties.
(in Chinese) [2] Werwei, Gao Bingjun: ANSYS in the application of mechanical and chemical equipment.

Analysis of Experiments of Cutting Force and Improvement of Surface Properties for Al2O3 Ceramics Inserts by Ion Implantation Wang Minghong a, He Fajiang b College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China agliu222@126.com, bmikehfj@163.com Key words: Al2O3 Ceramics Inserts, Ion Implantation, Cutting Force, Modification of Surface Properties.
The problem which people are following with interest all the time is how to improve the cutting properties and natural life of cutter.
An effective, simple and convenient method for changing the surface properties of inserts is obtained.
With further researches and higher quality of ceramics inserts in the world, they have become modern ceramics inserts materials with well physical, mechanical behaviors and cutting properties [2].
Conclusions Experimental researches are taken to improvement of surface properties of cutter material for Al2O3 ceramics inserts by N+ ion implantation.

Theses findings show the main factors that affects the intake process and the results will be used as a baseline to improve the intake system.
It is known that a clean and efficient engine requires a lean fuel to air ratio, meaning a fuel to air ratio that is more than 1.0, because a lean fuel to air ratio allows for low throttling losses at part load, high compression ratio and favourable thermodynamic properties as the air combusts.
Studies have been done in finding the factors that affects the flow rate of the inlet system.
Desantes [3] found out that these factors are the pulsations of the pressure in the intake system, the residue from the combustion that is left and impedes the airflow, and the different surfaces and of the different parts in the inlet system.
The factors that are focused on are the different pressure, different valve opening and the different configuration of the inlet system.

Among the referred drawbacks, Al loss during melting is a critical aspect, as its concentration in TiAl based alloys has a very strong effect in their mechanical properties.
Although a few studies of critical factors affecting the evaporation behaviour of Al during electron beam and induction skull melting of Ti-Al alloys had been carried out, until now no information was released on this subject for the ceramic crucible induction melting process.
Depending on the vacuum pressure and the melting technique Al loss by evaporation in TiAl melts can reach 15wt% [3], which is extremely relevant since the microstructure and mechanical properties of TiAl alloys are very sensitive to the Al content [4].
The microstructure at the surface of the cast samples was not affected by the pouring temperature or the chamber pressure.
Mitao et al., Effects of Microstructure on the Mechanical Properties and fracture of g-based Titanium Aluminides.

The influencing degree and trend of these parameters was studied by using the rang analysis, and the optimization set of factors was obtained.
Introduction Quality of the injection products is affected by many factors, such as mold design, the performance of the injection molding machine, material properties, process parameters, and the molding process have the most direct influence on the final quality of the products [1].
Table 1 Variable factor levels Levels Controllable factors A [°C] B[°C] C[s] D[MPa] 1 230 40 1.5 60 2 245 50 2 70 3 260 60 2.5 80 Four factors were studied in this research, three levels of each factor were considered.
If the value of Rang is large, it means that the change of the factor will affect the warpage greatly.
The values of Rang is shown in Table 3, and the trends of warpage with each factors studied in this paper are shown in Figure 4.

Study on conductive properties of composites based on the in-mold laminating technology Yan Zhonga, Pengcheng Xieb, Weimin Yang*c, Yumei Dingd College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China azhongyan3797@126.com, bxiepengcheng@gmail.com, cyangwm@mail.buct.edu.cn, ddingym@mail.buct.edu.cn Keywords: multilayered co-extrusion; lamination; conductive property; percolation threshold Abstract.
Their researches showed that composites like these would combine the advantages of different kinds of polymers, synergistic effect also appeared, so it had special advantages in the properties such as mechanical property, barrier property, optical property and conductive property [4-6].
Fig.3 showed the relation of conductive property and CB content.
Factors affecting electrical conductivity of carbon black- loaded rubber. ⅡEffect of concentration and type of carbon black on electrical conductivity of SBR.J.

Furthermore, the main factors influencing the critical depth of cut apI are experimentally discussed.
To get a clear understanding of the forming process, the forming principle and main factors influencing the cutting-direction burr are discussed.
Fig.1 Forms of cutting-direction burr in metal cutting The main factors affecting the cutting-direction burr formation include the physical mechanical property of the work material, the end shape of the workpiece, cutting parameters and cutting tool geometry etc.
The main factors affecting the cutting-direction burr formation are cutting parameters, the shape of end of workpiece, cutting tool geometry and workpiece material etc. 3.
Wang: Proceedings of Scientific Research (Mechanical Industry Press, China 1991).