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engineering can be mainly classified into five categories, namely single factor, a few factors in parallel, several factors tied, multiple factors and structural mechanics of rock media properties; according to the stage, all belong to surrounding rock classification of exploration stages, not considering the factors including the limitations of exploration methods, the complex impact of construction environment and time.
Correlation analysis Many factors influence the deformation of surrounding rock,as for their very nature can be divided into three categories: the first category is a natural factors of the geological environment, such as the physical and mechanical properties of rocks, structure and tectonics of rock, groundwater, natural stress state of rock, etc., they determine the quality of the tunnel surrounding rock.
There are two reasons for the deterioration of the surrounding rock stress and deformation over time:first, the rheological properties of the rock mass.
Many rock mass have the obvious rheological properties, especially weak rock,such as clayey rock and mudstone.
The table shows tunnel clearance final variation is mainly influenced by the level of the surrounding rock, and construction factors and external factors also have a great influence on the clearance final variation, while construction factors and external factors are mainly affected by human factors.

Mechanical stages are common but very important tools to all the fields in the modern world.
Moreover, based on the microscopic discoveries, the presence of friction would inevitably affect system dynamic response, especially for the presliding friction regime and the transition between these two regimes, since any subtle displacement or velocity variations was crucial to the high-precision motion requirement.
(5) It is mentioned in the original work that the function depends on many factors such as material properties, lubrication and temperature.
If a mechanical system subject to the friction force, then the equation of motion follows the Newton’s 2nd law.
Experimental Results The proposed scheme is performed on a common ball screw driven mechanical stage system operated in normal conditions.

The long-term corrosion resistances for the carbon steels have been investigated under high temperature pressurized water atmosphere, in the conjunction with the analysis of nondestructive properties by the ultrasonic wave.
The mechanical properties of carbon steel suffered from the corrosion cycle were investigated by a tensile test, attaching an acoustic emission sensor on the test sample.
The wall thining of carbon steel pipe was greatly caused by the flow-accerlerated corrosion (FAC) in the environmental atmosphere exposed to the flowing water or the wet steam. [4] The majority of R & D research for the corrosion damages of carbon steels was mainly focused on the evaluation of mechanical properties in the various operating environments.
Especially, the effect of corrosion cycle on the mechanical properties of carbon steels was examined, in the conjunction with the analysis of corrosion damages by the ultrasonic wave and the acoustic emission techniques.
In order to investigate the mechanical properties of carbon steels suffered from cyclic corrosion tests, the tensile test was conducted at the room temperature.

The interfacial mechanical characteristics in anchorage zone of grouted bolts influence the ultimate capacity of bolts directly; a push-out test was carried out at the lab to study the interfacial mechanical characteristics in the case of bond failure happening at the grout-rock interface, leaned from some scholars to test methods for analysis of concrete microstructure instead of rocks.
Until the mid-1950s, people began to theoretical study of the mechanical mechanism of the anchoring technique, the direction of the study is mainly focused on the bolt mechanical transfer mechanism and the effect on the surrounding rock, the aim of the study is to improve the anchoring of the ultimate bearing capacity, to optimize the anchor design.
Early as 1967, Luta L and Gergeley.M [2] launched a study on the sliding nature of Reinforcing Steel in Concrete, Hanson [3] and Goto [4] thought that the anchor surface shape of the anchoring force plays a vital role, Rong Guan and Zhu Huan-chun et al conducted a comparison test of rebar and round bar mechanism, these studies show, the anchor rod surface shape and the intensity of the main factors affecting the anchorage force.
Obviously, until the currently most studies focus on the bolt - mortar interface properties of, but studies have shown that many cases occur mortar - rock interface failure [5, 6], especially in the pressure bolt prone to such failure modes.
Relationship between microstructure and mechanical properties of the paste-aggregate interface [J].

The main objectives of this paper is to find the way for solving the problems of aluminum extrusion process, and improve the mechanical properties of the products through a smart design, modelling and simulation of this process by using finite element method (FEM).
There are many factors that affect the surface finish, properties and structure of the section, which are the conditions of the billet and the container, extrusion speed and extrusion ratio.
Various factors such as geometrical dimensions, variation of mechanical properties over the extruded length and cross section, appearance and regularity of the microstructure, chemical composition and surface finish, are functions that determine the quality of an extruded product.
Conclusion Low material waste and energy consumption, high productivity, good mechanical properties of extruded components, is the main features of cold extrusion technology.
Aluminum Extrusion, Alloys, Shapes and Properties.

At the same grinding parameters, Ti-5-5-5-1-1 had the maximum depth of heat-affected zone because of its poor high temperature properties.
The mechanical properties of tested materials are shown in Table 2[1,5].
Grinding force is one of the most important factors in evaluating the performance of grinding process.
So the construction of complicated coatings on ground surfaces could be contributed significantly to chemical reactions and mechanical factors.
Scratches and some kind of plastic deformed coatings existed on surface, the construction of them could be contributed significantly to chemical reactions and mechanical factors.

Suspended centrifuge which is the post-treatment equipment during the production process is widely used in the sugar manufacture industry .Sieve basket is the key parts of the suspended centrifuge because its structure, shape and processing property will not only affect the production and use cost of the suspended centrifuge , but also will largely determine the service life of the centrifuge.
The centrifuge used by sugar refinery is mechanical equipment that makes use of the centrifugal force to separate the liquid and solid particles or liquid and the components of the liquid mixture from each other.
We should distinguish the difference of strength standard between the rotary drum and the safe factor.
The centrifugal pressure of filter screen (Pd): use Eq(11) to calculate: The pressure which affects the inner wall is combined material pressure and filter screen pressure.
Journal of Mechanical Strength，2002，24(2):295-297 [7] Jiang Yongtao.Finite-element Analysis and Structural Optimization for Drum of Hang Type Centrifuge [D].

Different SiC volume fractions, processing temperature and stirring time have different influence on tensile strength and elongation of SiC; but how to find out the satisfied treating parameters is an unavoidable question, a hybrid method is put out and experiments prove the effectiveness of research work. 0 Introduction SiC particle reinforced magnesium matrix composites have been widely applied in automobile industry, mechanical engineering and other industries because of their excellent properties such as low density, high strength-to-weight ratio, excellent casting capability, good machinability and damping characteristics[1-4].
Model between performance and affecting factors is constructed with artificial neural network (ANN).
The construction of testing equipments is represented in figure 2. 1 thermocouple 2 heating resistance wire 3 crucible 4 intelligent temperature controller 5 resistance furnace 6 stirring blades 7 vacuum tank 8 pressure testing meter 9 sucking pipette 10 vacuum pump 11 windpipe 12 speed-variable motor 13 stirring pole Fig. 2 Schematic diagram of stir casting of SiCP/AZ61 composites 2.2 Experiments design The composites mechanical performance is affected by many factors, such as SiC volume fractions, processing temperature and stirring time, so the orthogonal experiment design is adopted, there are three factors and each factor has three levels, corresponding results are shown as table 1.
Vol. 22A (1991), p. 957-981 [4] Hu Lianxi,Wang Erde, “Fabrication and mechanical properties of SiCw/ZK51A magnesium matrix composite by two-step squeeze casting,” Materials Science and Engineering, Vol.
Zhang, “Research on Properties of SiCP/AZ61 Magnesium Matrix Composites in Fabrication Processes,” Materials Science Forum, Vol.561 (2007), p.945-948 [9] Wei Haikun: Theory and Method of Neural Network Structure, Beijing: Defense Industry Press, 2005

Since the properties of materials are strongly dependent on microstructure, the manufacturing parameters affect the material parameters during the process.
The importance of texture stems from the fact that all crystals are anisotropic in most the mechanical and thermal properties[13].
Consequently understanding the texture modifications leads to predicting the properties of the material either during machining (i.e. material parameter) or after machining (final properties).
Essentially, there are several factors affecting grain size evolutions.
In our case, in the area 1 (area right below the tool), the grain growth factors drive the grain evolution response while a little deeper in the material the grain refinement factors govern the evolution.

Effects of Nano-Silica Addition and Reactive Diluent Addition on Dynamic Mechanical Properties of Epoxy Nanocomposites Huey-Ling Chang1a*, Chih-Ming Chen2b 1 Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan, R.O.C. 2 Department of Mechanical Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan, R.O.C.
Recently, new strategies have appeared utilizing nanoparticles to improve toughness and other mechanical properties [1].
Some researches demonstrated that using nanometer fillers can significantly improve thermal and mechanical properties [3, 4].
The silicon dioxide powder can enhance many properties [5, 6].
The trapped solvent will affect the properties of the nanocomposites after curing.