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Due to a very complex character of operation and specific load, were tested in order to determine the dynamic properties by means of DMTA method, thus to determine the storage modulus E’ and the mechanical loss factor tgδ, responsible for dispersion of mechanical energy.
Due to a very complex character of operation and specific load, were tested in order to determine the dynamic properties by means of DMTA method, thus to determine the storage modulus E’ and the mechanical loss factor tgδ, responsible for dispersion of mechanical energy. , were then tested in order to determine the dynamic properties by means of DMTA method, thus to determine the storage modulus E’ and the mechanical loss factor tgδ, responsible for dispersion of mechanical energy.
Assessment of dynamic mechanical properties by means of DMTA method was carried out within the range of temperature from -50°C to 120°C, with the frequency of sinusoidal vibrations of 1 and 20 Hz, amplitude of 120um and the heating rate of 2°C/min.
The results of testing of dynamic mechanical properties for the samples not used in human body are presented in Fig. 3.
DMTA thermogram for SIMPLEX P not used in human body Use of polymethyl methacrylate in human body over a period of ca. 10 years causes insignificant changes in mechanical properties of PMMA (Fig. 4).

Taking the effect of geometric errors on machining accuracy into consideration in the design of small precision machine tools, the thermal errors become the main factor affecting the machining accuracy of machine tools.
So, thermal error will be the major factor that affects component accuracy.
Also, to control the error that caused by thermal deformation will be part of the key factors to improve machining accuracy of machine tools.
Intellectual Property Publishing House, 2008: 10:22
Mechanical Engineering,2012 (05)

Wear properties of R19 Steel are evaluated because it is widely used in making the rail wheel and rail roads over the years.
The Surface morphology plays an important role in affecting the wear rate.
One of the most important factors that affect the coefficient of friction during sliding is the surface texture.
Material and experiments Considering the wide applications of R19 Steel and the wear resistance & hardness properties of Titanium, they were selected as specimens for the study.
[2] J.D.Bressan, D.P.Daros, A.Sokolowski, R.A.Mesquita, C.A.Barbosa:”Influence of hardness on the wear resistance of 17-4PH Stainless steel by the pin-on-disc testing”, Journal of material processing and technology 2008 pg.no 359-363 [3] G.M.Sorokin, V.N.Malyshev:”Criterion of wear resistance for ranking steels and alloys on mechanical properties”, International Journal of material and mechanical engineering vol.1 Iss.6, November 2012

In these years, the newly developed functionally graded materials (FGMs) with continuously varying properties have been designed and manufactured [1].
The crack-tip stress field and the stress intensity factor is determined by not only the distribution of the composition, microstructure and mechanical properties, but also the position, orientation, external load, size and shape of crack, which will lead to the complexity of the crack-tip stress field and the stress intensity factor.
For FGMs, another factor that affects the calculation precision is the layered number and the relationship between C1 displacement and the layered number was shown in Fig.4.
Numerical Results and Discussion The mechanical properties of FGMs are inhomogeneous, so the crack tip will always be loaded in a mixed state, and the stress intensity factor of the crack tip of mode I and mode II generally equals to 0.
“Effect of the Transitional Gradient of Material Property on the Mechanical Behavior of a Non-homogeneous Interlayer.”

Results show that concrete with 5% eggshell powder is optimal for high mechanical properties, lower water absorption and low carbonation depth.
This objective of the present study is to investigate the mechanical properties and durability of concrete with eggshell powder and tyre crumb.
While mechanical strength of concrete may be attributed to various factors, water absorption of concrete was commonly related to the internal packing of concrete microstructure.
Replacement of 5% sand with tyre rubber produces concrete with higher durability despite negatively affecting mechanical strength.
Sofi, Effect of waste tyre rubber on mechanical and durability properties of concrete – A review, Ain Shams Eng.

(a) beam RC1, RC2 (b)beam RC3, RC4 Fig. 3 Comparison of load-displacement curve between corroded beams and reinforced beams The mechanical properties of corroded reinforced concrete beam The properties of corroded steel bar.
With the increase of working time, the mechanical properties of reinforced concrete beam degenerate gradually, in these influence factors, the reinforcement corrosion is the main factor.
After steel corroded, it is material mechanical properties such as yield strength, ultimate strength and ultimate strain changes, and yield platform shorten until disappear.
The properties of aging concrete.
Un-carbonated concrete account for the most part in reinforced concrete beam, its material mechanical properties directly influences the bearing capacity of components.

The properties of C/C-SiC composites can be greatly influenced by the factors of GSI process such as the infiltration reaction temperature and the temperature of high temperature treatment (HTT) on C/C [11, 12].
Mechanical properties.
Figure 3 shows the mechanical properties of C/C-SiC composites with different HTT temperatures.
And the higher HTT temperature led to the higher level of decline of the mechanical properties.
(3) The mechanical properties of C/C-SiC composite were poorer after HTT on C/C green body.

Their mechanical properties like a strength and hardness of Al are mainly depended their microstructure.
Affects the mechanical properties of the material the smaller the grain size, more are the grain boundaries.
Results and Discussion Mechanical Properties.
The as-cast alloy shows poor mechanical properties because of its coarse cast structure.
Effect of cooling rate on solidified microstructure and mechanical properties of aluminium, J.

The NPP safety assessment therefore requires precise information on the degradation of the mechanical properties of the NPP components structural materials.
Mechanical properties of the NPP components structural materials are presently evaluated by “conventional” methods, comprising of surveillance programs.
Fracture properties are evaluated either from Charpy impact tests (notch toughness, ductile-to-brittle transition temperature), or from fracture toughness tests (JIc – critical J-integral, KIc – critical stress intensity factor, T0 – reference temperature, etc.).
Furthermore, for the determination of material properties, sampling of the necessary volume of material is connected with affecting the integrity or even with the destruction of the assessed component.
Subsequently, the majority of the tests results were permitted to be taken into account in the process of mechanical properties evaluation.

The sulfate attack from internal or external sources is one of the most factors affecting the durability of concrete structures [17].
This study investigates the behavior of NaOH-activated slag in order to contribute to understanding their properties; this binder is compared with slag cement and Portland cement (PC) in terms of mechanical properties, drying shrinkage, hydration heat and durability against sulfuric acid and sulfate attack.
Roy, Early activation and properties of slag cement, Cement and Concrete Research. 20(6) (1990), 961-974
Pratt, Factors affecting the strength of alkali-activated slag, Cement and Concrete Research. 24(6) (1994) 1033-1043
Payá, Mechanical and durability properties of alkali-activated mortar based on sugarcane bagasse ash and blast furnace slag.