Search results

The plastic strain of fine-grained subgrade under repeated loads can be determined by the model proposed by Li and Selig [3].
The Deriving calculation formula is Eq.1: Eq.1 In which, is the as a percentage of roadbed accumulated plastic strain, is the surface stress of roadbed, is the compressive strength of roadbed, which can be obtained by the static triaxial loading test, is the applied numbers of repeated load, are regression parameters of roadbed, determined by the roadbed type.

In figure 3, different wiper positions do not cause different spaces between dendritic grains.
As wiper position rises, the numbers of defects increase (Table 4).

Results of the Experiments and Discussion As can be seen in the photograph of the tablet obtained with a MIRA3 TESCAN electron microscope (Fig. 3), the structure of the material is sufficiently fine-grained and homogeneous, which should contribute to a constant composition of the resulting coatings.
This approach makes it possible to quickly carry out a large number of studies in order to obtain more advanced anti-friction, heat-resistant, corrosion-resistant and other functional coatings.

For fatigue test a pole shape specimen was applied to a tensile-tensile test (180MPa/180(R=0.1)) on MTS 810 machine to measure the number of cycles at fracture in the stress.
It is well reported that the mechanical properties would be improved with the decrease of grain size and primary α phase size.

The United States and France have excellent structural profiled absorbing carbon fiber used in stealth aircraft [7]. 1.5 Chiral carbon fiber Spiral carbon fiber is a typical chiral material with wide grain size distribution and excellent electromagnetic wave dispersion effect.
Its diameter is 4-30μm and adjustable root number is between 1000~5000.

Different magnetic matrices, in the same background field intensity of magnetic field gradient is different, for different fineness of ore grain, magnetic separation effect is different. [7]According to the separated materials, in the background field strength for 1.2 T, choosing different magnetic matrices to obtain the result is shown in Table 3.
So, one-time high gradient magnetic separation can get qualified concentrate, there is no need to increase the number of cleaner.

The number of microcracks decreased with increasing rolling speed and was hardly observed at rolling speed above 1m/min and strip with good surface was obtained.
It was recognized by observation of the cross-sectional microstructure that columnar dendrites grow along the direction of heat transfer from the surface to mid-thickness region and an equiaxed crystal grain is present in mid-thickness region.

The increase of initial compressive stress was responsible for the expansion of grains because silanol (Si-OH) is formed by reaction between moisture and oxide film.
Intensity Wave number (cm-1) Fig. 3.

While there have been a number of studies to tailor the properties of aluminum using different types and amount of reinforcement, there has been no attempt made to study the effect of the level of deformation such as extrusion ratio on the microstructure and tensile properties of Al-Mg2Si composites.
Fig. 2a shows a typical microstructure of Al–15 wt.% Mg2Si composite, which according to the pseudo-binary phase diagram (Fig. 2b), consists of dark faceted particles of primary Mg2Si and bright α-Al grains in a matrix of Al–Mg2Si eutectic cells.

., Nové Strašecí) and fine grained quartz sand ST2 with maximum particle size of 0.1 mm and STJ25 with maximum particle size of 0.3 mm (both manufactured by Sklopísek Střeleč, a.s.).
The difference in load ∆P was calculated for all the recorded data during the experiment between points B and C (Fig. 3) as:∆P = ∑np i=1 |PB−C,teor,i − PB−C,exp,i| np , (6) where np was number of the recorded data between points B and C.