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With the resulting steels, we have made metallographic determinations using optic microscopy and determinations of the main mechanical properties.
The PM process offers many routes to improve mechanical properties through alloy design, increased density and high temperature sintering.
Of the factors which influence the hardenability of sintered steels it is noted their apparent density (porosity), chemical composition from the viewpoint of carbon content and alloy element and the size of austenite grains [11].
Doherty, Microstructure and mechanical properties of PM steels alloyed with silicon and vanadium, International Journal of Powder Metallurgy 48 (2012)
[9] Chris Schade, Tom Murphy, Alan Lawley, Roger Doherty, Microstructure and mechanical properties of PM steels alloyed with silicon and vanadium, International Journal of Powder Metallurgy 48 (2012) 41-50

The different in composition of glass fibre is expected to yield different response hence can be used to determine the properties of the material.
However, in dynamic situations their behavior is very complex due to a large number of factors that govern their response.
These factors include impact velocity, specimen geometry, impactor size, clamping mode, matrix properties and reinforcement geometry [2].
Also the mechanical behavior including impact behavior of composites is much dependent on the fiber volume fraction.
Influence of fibre length and concentration on the properties of glass fibre-reinforced polypropylene: 1997;28:277–88

Especially wheel profile is one of the most important design factors to rule the running stability and safety of train.
However, roughness on the surface, humidity and such fine particles as rain, snow and sand are also affecting.
The mechanical property of ER7 is shown on Table 1.
The figure of Korean High-Speed Railway is UIC60 and its mechanical property is listed on KSR TR001-07 (Korean Railway Standards).
Table 1 Mechanical properties of wheel for KTX Steel Grade Rim Tensile Strength (N/㎟) Yield Strength (N/㎟) Reduction of section area(%) Brinell hardness Impact values KU at +20℃ : Aver.

There are also studies on tensile properties of APFREC that has been done by Siregar [8] and study on impact properties of APFREC by Leman and his colleagues [9].
Moisture, heat, UV light and many other environmentally induced factors tend to cause changes in a composite’s property.
These factors can cause changes either on its mechanical or physical properties.
After weighing, the epoxy resin was left for 8 to 10 min to remove entrapped air which can impair mechanical properties of the composite.
Mechanical properties of woven banana fibre reinforced epoxy composites.

A remarkable synergetic effect between the GNSs and MWCNTs on the enhanced mechanical properties and thermal conductivity of the epoxy composites was demonstrated.
Graphene has shown many remarkable properties, such as excellent electronic transport properties, high thermal conductivity, structural, extraordinary mechanical properties, low density and large specific surface area [6].
Two factors were proposed to explain this phenomenon: (i) the contact geometry changes from 0-D point contact to 1-D linear contact, increasing the contact area within hybrid nanofillers considerably.
A remarkable synergetic effect between the AFGNS-MWCNT on the enhanced mechanical properties and thermal conductivity of the epoxy composites was demonstrated.
A remarkable synergetic effect between the GNSs and MWCNTs on the enhanced mechanical properties and thermal conductivity of the epoxy composites was demonstrated.

The ceramic material is known to be linear elastic and its properties do not depend on temperature.
Full bibliographic mechanical and thermal properties are available for alumina (A), stainless steel (SS) and filler metal (FM) on Table 1.
Mechanical and thermal properties of each component according to temperature: Alumina (A), Filler Metal (FM), Stainless Steel (SS).
Geometrical factors level (Tab. 1) Von Mises stress (MPa) -1 +1 Figure 11.
Geometrical factors effects on maximal stress of the pipe design 6.

The amount of solder and the size of solder are selected as the two quality properties.
Three levels are defined for the three control factors.
We select four factors as the essential factors affecting the quality control.
The quality characteristics related to the control factors are revealed.
Conclusion After the analysis of response surface method, the essential factors which affect the manufacturing process can be found.

Abstract.Wind power is an important source of green power.The equipment, generators, and power systems are all determining factors of equipment efficiency.
Cogging torque is a major issue affecting generator efficiency.
Excessive cogging torque creates difficulties in starting the generator or jerkiness during operation, which directly influences the mechanical and electrical properties of the generator.
Their manufacturing methods and properties also vary considerably, as shown in Table 1.
Silicon steel has unique applications and superior electromagnetic properties that are essential in industries involving electric power, telecommunications, and measurement instruments.

Meanwhile, the factors which can have effects on the behavior of the beam-column joints are also obtained.
The reasonable parameters such as material constitutive, the boundary conditions and mesh types will directly affect the accuracy of finite element analysis results.
To compare the differences between the experimental results and analytical results, the component sizes, reinforcement arrangement, material properties and forced states of model M1, M2 and M3 are the same as joint specimens ZHJ1, ZHJ2 and ZHJ3 designed in reference [9].
The concrete damaged plasticity model is suited to simulate mechanical properties of concrete under monotonic, cyclic or dynamic loadings in low confining pressures.
The main reason is that the finite element analysis is always realistic but in practical experiments, there are some inevitable factors, such as the defects and errors occurred in the process of loading and measuring.

By studying a typical rectangle PCB, the design parameters affecting natural frequency of PCB are found in the paper.
Theoretical Analysis of Modal Sensitivity Sensitivity means the change of gradient about concerned properties of a product with respect to the design parameters.
Geometrical property sensitivity analysis.
Based on the analysis above, all the results are calculated in Fig.7 (b) after further sensitivity analysis of different factors.
Mechanical Vibration [M].