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Introduction In improving physical-mechanical properties of materials, we largely depend on the treatment technology including modern methods and the combination of various techniques.
In this case, higher toughness may be caused be the following factors.
The character of the specimen fracture of Fe360 low-carbon steel with a coarse- and sub-microcrystalline structure with a V-shape incision at impact bending was affected, besides the structure condition, defectiveness, and other factors, by the grain size and a lower testing temperature. 2.
Zolotorevskiy, Mechanical properties of metals, Metallurgiya «Publ.», Moscow, 1983
Shagalina, The mechanical properties of submicrocrystalline steel 09G2S after ECA-pressing, Moskovskiy institute stali I splavov «Publ.». (2004) 143

The permeability of these mixtures is also strongly affected by the technology behind their production because they are manufactured to achieve maximum density according to the Proctor test [4].
Table 1: Physical-mechanical parameters of used Liapor aggregates Property/Aggregate 1-4/500 4-8/450 8-16/275 Bulk density - loose fill [kg·m-3] 490 460 273 Compressive strength by compression in the cylinder [N·mm-2] 3.0 1.7 0.6 Void space – loose fill [%] 34.8 40.3 44.8 Absorption [%] 5 minutes 11 8 6 30 minutes 13 10 8 60 minutes 15 12 10 120 minutes 17 14 13 total 30 25 25 Table 2: Physical-mechanical parameters of used natural aggregates Property/Aggregate 0-4 Bulk density - loose fill [kg·m-3] 1550 Density [kg·m-3] 2660 Void space – loose fill [%] 41.7 Absorption [%] 5 minutes 0.4 30 minutes 0.4 60 minutes 0.6 120 minutes 0.6 total 0.7 The results show a significant difference between the values of absorption for natural and Liapor aggregates.
From the point of view of the design of the sub-base mechanically strengthened or cement-bonded mixtures, absorption in the short term is a significantly important factor in predicted retention capacity.
The results of the absorption and other physical and mechanical properties of the mixtures are shown in Table 4.
This factor is significant for the immediate capture of rainwater.

The properties of dolomite can be identified in terms of physical, chemical, mechanical, structural, morphology and thermal properties.
Thus, the mechanical properties of the dolomite could theoretically be influenced by the physical and chemical properties.
Several reviews on the mechanical properties of the dolomite have been summarized in Table 3.
Thus, based on the reviews upon the required mechanical properties, it can be assured that the dolomite has the potential to be utilized as bioceramics for the purpose of biomedical devices with exceptional mechanical properties.
Table 3 Related reviews of mechanical properties of dolomite.

Ti-6Al-4V is an alloy that is increasingly used in aeronautics due to its high mechanical properties coupled with the lightness.
Previous studies showed that the key factor that rules the mechanical properties and the fatigue life of the joint is its morphology.
The underfill and reinforcement defects not only influence the appearance of the weld joints, but mainly causes a stress concentration at the weld edges, which have a great effect on the mechanical properties of the weld joint, in particular on the fatigue behavior.
Effect of welding parameters on morphology and mechanical properties of Ti-6Al-4V laser beam welded butt joints.
Investigation on the microstructure and mechanical properties of Ti-6Al-4V alloy joints with electron beam welding.

Analysis and solution of the influence of mine water on the electric and hydraulic control system Lizong Liu 1,a, Xinnan Zhao 2,b and Enqing Xie 3,c 1China Coal Research Institute, Hydraulic support research department, Beijing, 100013, China 2China Coal Research Institute, Hydraulic support research department, Beijing, 100013, China 3China Coal Research Institute, Hydraulic support research department, Beijing, 100013, China a sddh818@163.com, bzhaoxinnan6@hotmail.com, cxienqing@yahoo.com.cn Keywords: Mine water, hydraulic support, the electric and hydraulic control system, influence factors, countermeasures.
Influence factor Mine water is not chemically pure water, but a complex solution, its physical properties and chemical composition is along with the change of time and space.
In addition to clean mine water the other four kinds of water are likely to affect the electric and hydraulic control system.
Mechanical impurities and suspended solids.
Huiling Shang on the relief valve failure of the deep reason do iron spectral analysis [2], is shown in Fig.1, through the taken by the iron spectral pollutants in the relief valve failure to reveal the map of the micro factors: metal particles, coal, by oxide and scale, the oil content of the mixed pollution degradation etc, so that causing clogging and failure.

Buckling Optimization of Composite Shells by Utilizing Finite Element Analysis, Neural Networks and Genetic Algorithm Hossein Amirabadi1,a and Mehdi Mostofi2,b 1Department of Mechanical Engineering, Abadeh Branch, Islamic Azad University, Abadeh, Iran 2Department of Mechanical Engineering, East Tehran Branch, Islamic Azad University, Iran ahossin_amirabadi@yahoo.com, bmehdi_mostofi@yahoo.com Keywords: Composite shells, buckling, optimization, neural network, genetic algorithm.
In addition, the kind of goal function significantly affects network functionality.
Material is a Carbon/Epoxy called T300/976 commercially and has the following properties: , , , , , thickness (t) = 0.1429 mm.
The compared shell has geometrical and mechanical properties as follow [11]: Table 2.
Predicting of only one optimized point by optimization algorithm can be due to different factors, such as function shape is affected in a wider range, in such a manner that, with change in numerical optimization parameters, convergence will be occurred faster.

It has been developed rapidly because of its good comprehensive properties].
Ceramic particle reinforced Cu-base composite materials have greater electrical and thermal conductivity, higher wear-resistance and better high temperature properties.
The cutting factors is selected to be ap=0.1~0.5mm, f=0.1~0.2mm/r, n=1400r/min (v=0.88m/s) and 320r/min(0.22m/s).
When the cutting factors are bigger, the F values are closer.
There is a great difference of the physical and mechanical properties between its reinforced body and substrate Cu.

There is a lot of related experimental and theoretical research [8-14] on the structural, mechanical and optical properties of Group-IV materials.
Therefore, it is of great significance to study the bowing factor of lattice constant of alloy materials for understanding the structural properties of materials.
Adachi, Properties of semiconductor alloys: group-IV, III-V and II-VI semiconductors, Wiley. com2009
Kouvetakis, Optical and structural properties of SixSnyGe1−x−y alloys, Applied Physics Letters, 84 (2004) 888-890
Ferhat, Unusual structural and electronic properties of SnxGe1− x alloys, physica status solidi (b), 240 (2003) 116-119

Both material properties and geometric parameters were optimized.
The value of these properties was not in the catalogue, and the properties used to perform the material selection were related to a material sub-class, Eg.
The mechanical tests performed were: Tensile Test and Extensometry Test, to obtain the relevant material properties, mainly Young Modulus, Poisson Coefficient and Yield Stress.
To achieve the aim of deflection reduction, one must optimize both geometric parameters and material properties, focusing two main factors: The Young Modulus and the Inertia Moment, with the goal of maximizing the rigidity and minimizing the object mass.
In both models one considered three geometric variables and three material properties variables.

As using different geometry, load properties and boundary conditions, it can incentive the external prestressing curve beam and mimic activity characteristic.
With the service operation of curved beam structure, to some extent many external factors will caused by the weakening and damage of curved beam structure’s performance.
While using external prestressing technology, the curved beam structure with enhanced mechanical properties will be a very effective reinforcing means [11-12].
Connection anchor of anchorage device is to achieve transfer of the external prestressing .The joint’s subtle change is likely to have an impact on the overall structure properties.
The external prestressing reinforcement process of curved beam will be subjected to a number of factors and limitations.