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Finally, the variation regularities of stress-strain characteristics of reinforced soil with the changes of different influencing factors is studied.
In the past ten years, a number of rheological models of geosynthetics including component models, endochronic model and experiential model were gradually proposed, which reflect the viscoelastic or viscoelastic-plasticity and mechanical properties of geosynthetics.
Then, we could analyze the variation regularities of stress-strain of the reinforced soil structures as the factors change.
(a)macro-stress (b)micro-stress of soil (c)micro-stress of geogrid Fig. 5 Sstress state of a compsite unit in a reinforced embankment The physical and mechanical properties of soil in Fig. 5 are assumed in Table 5.
Experimental study on creep properties and viscoelasticity constitutive model for geogrids.

However, because the DB that can predict mechanical properties of composite material and fiber orientation distribution by the fiber content ratio was not constructed, we need the systematic study for that.
Tensile strength of fiber reinforced polymeric composite is affected by the fiber orientation distribution more than by the fiber content ratio.
The products press-molded are not uniform because of fiber orientation and show aestropy, so it has a lot of effects on the mechanical properties of molded products.
Fiber orientation can happen by material factor such as intervening power of each fiber according to fiber diameter, the length of fiber, and molding factor such as closing speed of metal casting, molding press and the temperature of metal casting.
The products press-molded is not uniform because of fiber orientation and shows aestropy, so it has a lot of effects on the mechanical properties of molded products [1, 2].

Through metallographic analysis, mechanical properties test, high temperature and high pressure autoclave researching, the effect of microstructure and properties on corrosion resistance of the material was studied.
The purpose of this study is to find out the influence of different chromium content on the microstructure and mechanical properties of steel, and its influence on corrosion resistance, so as to provide a theoretical basis for rational material selection in actual production.
Previous studies have shown that the diversification of microstructure and mechanical properties could be caused by the difference of the chemical composition and processing mode of the tube, which would affect the corrosion resistance of the material[13-15].
Another factor is that carbon content affects the existence of chromium atoms.
Considering the economic factors, the 3Cr alloy can also be considered as a priority.

In manual mixing, air and impurities will be used to produce pores, thereby affecting the quality of the casting.
Effects of various contents of nano-NiAl on microstructure and mechanical properties of the alloy were studied.
Ceramic particles usually have high strength, high wear resistance, high melting point and other physical and mechanical properties, which are widely used to improve the comprehensive properties of iron matrix, then achieving iron matrix composites with excellent mechanical properties.
Yang, et al, Effect of TiC/NbC addition on microstructure and mechanical properties of iron matrix composites, Rare Met.
Ru, et al, Pressure-less sintering behaviour and mechanical properties of Fe2O3-containing SiC ceramics, J.

The reason is that, after severe deformation, there will be various strengthening modes, such as slip, mechanical twinning and shear banding which affect the distribution of internal stress within crystals of face-centered-cubic (f.c.c.) materials [5].
Samples σ0.2 (Mpa) σb (Mpa) εu (%) εe (%) Before annealing 710.79 748.27 1.72 3.08 Annealing at 200℃ 873.93 914.34 1.67 2.00 Annealing at 250℃ 747.49 796.11 1.76 2.84 Table 1 shows the tensile properties of the specimens annealed at different temperatures.
So the fine-grain strengthening and the micro-stain closely related annealing twins are not the major factors that induce the anomalous hardening in cold-rolled copper alloys.
Wang, Enhancement of mechanical properties of heat-resistant martensitic steel processed by equal channel angular pressing, Mater Sci.
Lu, Microstructure evolution and thermal properties in nanocrystalline Fe during mechanical attrition, Acta Mater. 49 (2001) 365-375

Microstructure of eroded surface, mechanical properties and erosion rate were characterized.
Surface roughness of eroded samples was measured using AMBIOS XP-200 surface profilograph and roughness factor Ra (average surface roughness) was calculated.
These are expected to be M7C3 and M23C6 types of carbides Fig.1 Optical micrographs of (a) 13/4 steel and (b) as received 23/8N steel Table 2 shows the mechanical properties of hydro turbine steels studied.
Table 2 Mechanical properties of 13/4 and 23/8N steels Steel Hardness (VHN) Impact energy (J) YS (MPa) UTS (Mpa) Ductility (% elongation) Tensile toughness (MJm-3) Strain hardening exponent (n) 13/4 296 64 763 833 12 68 0.07 23/8N 266 41 567 820 32 240 0.55 The data on cumulative weight loss due to cavitation erosion for the samples in this investigation is plotted as function of time of cavitation erosion in Figure 2(a), while Figure 2(b) presents mean depth of erosion (MDE) versus time of erosion curve.
Mechanical properties significantly affect the erosion resistance of the target material In nitrogen alloyed 23/8N steel higher resistance to cavitation is due to high hardness coupled with good mechanical properties in comparison to those of 13/4 steel.

Three kinds of dimensional simplified models were established according to the structure properties of interpenetrating network composites.
The random properties of cutting forces were also analyzed.
The random cutting force properties were also analyzed.
The cutting properties especially cutting forces are affected by reinforced phase parameters ｄ, α and β of INC.
Because the mechanical properties of reinforced phase and matrix are mismatched, the surface crack could arise for the separation of the two phases on interface.

Because of the high variation of the physical and mechanical properties the part has to have a high reserve factor and thus weighs more [3].
Mechanical properties.
This is considered optimum for achieving maximum mechanical properties.
Mechanical properties.
The MTI laminate had good mechanical properties but poor void and defect results.

China has hundreds of Mines exist such problems that seriously affect the deep coal resources safety and efficient mining [2].
For the next step to determine the type of soft rock tunnel, mechanical deformation mechanism of rock stability control measures and provide the basis for supporting technology.
By X-ray diffraction analysis, the factors that endanger stability of surrounding rock the first factor is the amorphous mass fraction is too high, the second factor is the relatively high mass fraction of clay minerals, in which the expansion of the mineral mass fraction higher.
Scheme design Large internal porosity of soft rock, not only the low strength and large deformation, but also exhibit plasticity, rheology and other complex mechanical properties [4].

This will directly affect the fatigue life.
Process like decarburization affects the hardness of the surface and fatigue life changes.
Machining parameters of AFM and the rheological properties of the abrasive medium are the two factors that will affect the efficiency of the process.
Removing the stress raisers at sharp corners by producing controlled radii on edges can substantially improve thermal and mechanical fatigue strength.
Design of experiments A statistically design of experiments (DOE) technique, two-levels three variable full factorial design of experiments is used here [14].The three design factors considered in the design of the experiments are extrusion pressure (A), grain size(B) (or mesh number) and abrasive concentration (C).