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Fibers had the effect of improving some of the material properties of concrete such as flexural toughness, fatigue resistance, impact resistance, and post-crack strength [1, 2, and 3].
The fibers enhance the concrete properties by improving its effectiveness in inhibiting the rapid and unlimited propagation of cracks, associated with catastrophic failure in plain concrete.
Synthetic fibers have some unique properties that make them excellent candidates to be used in concrete.
The geometrical and mechanical properties of fibers used in this study are presented in table 2.
Geometrical and mechanical properties of fibers Fiber ID shape Length (mm) Specific gravity Tensile strength (MPa) Elastic modulus (GPa) CR crimped 60 0.91 379 4.14 TWS Twisted 60 0.91 379 4.14 Mixtures.

the relative weights ratio distribution wi/wj Equal importance Weak importance of one over another Essential or strong importance Demonstrated importance Absolute importance Intermediate values between the two adjacent judgement aij 1 3 5 7 9 2, 4, 6, 8 Optimization strategy base on the grey rational grade The grey rational grade is a method which can analyzes rational factors correlation or scalarization regional innovation in the grey system theory.
The weighs factors approaches scale according to develop extend resemble and dissimilarity in the person of relations between factors, providing information with system identity, forecast, decision, control.
The rational grade describes dynamic status similar degree between events, factors[13-15].
Fig.1 Auto panel three-dimension model Simulation forming Set up finite element model The St1405 material is investigated in this work which the property is listed in Table1.
Batoz, et al: International Journal of Mechanical Sciences Vol. 43 (2001), p. 2407-2434 [6] N.M.

Introduction With the rapid advancement of the micro-nano technology, micro electro-mechanical systems (MEMS) characterized by small size and shape has become an emerging technology, but the fabrication of micro machining tools for the micro components made of brittle materials is one of the difficulties restricting the advance of MEMS.
Using this characteristic, called the ER or MR effect, to control the mechanical properties, the clutches, dampers, seals and composite beams have been applied in engineering successfully [1,2].
The removal depth (about 0.48µm) at the diamond size of 125µm reduces by a factor of about 10 than that of 5µm.
The abrasive content dispersed in the EMR fluid determines the concentration of the abrasives in the EMR-effect-based tiny-grinding wheel and affects the chains of the EMR particles, then directly influences the polishing performance of the tiny-grinding wheel.
Therefore, the presence of the diamond abrasive can enhance the removal ability of the tiny-grinding wheel, and an appropriate concentration of the diamond abrasive can affect the structure and the effective machining size of the tiny-grinding wheel, whereas too much diamond abrasives have little effect on the polishing performance of the tiny-grinding wheel.

We only examined the above military entity relationship system constituted ignored the influence of other factors that may exist for the entire system problems.
In the simulation, we get simulation results shown in Fig. 3, the described trend between the variables of these three factors, the blue fighters dispatched scale (BFT), blue air defense systems dispatched scale (BMT) and the sea battlefield command of the air control effect.
In the simulation, we get simulation results shown in Fig. 4, the described trend between the variables of these four factors, the red fighters dispatched scale (RFT), the blue fighters destroyed red fighters probability (BFFC), the blue air defense system destroyed red fighters probability (BMFC) and the sea battlefield command of the air control effect.
Later in the simulation, sea battlefield command of the air control effect and red fighters dispatched scale two factors is an inverse relationship.
Dynamics and bifurcations of non-smooth mechanical systems [M], Berlin：Springer, 2004

Hence, the bond integrals used in our development are represented by analytical functions similar in form to that of Goodwin, Skinner and Pettifor [16], which are multiplied by screening factors the dependence of which on separation of atoms was established in [15]; for details see [10, 11, 17].
Instead, a physically justified empirical formula is used so that the constructed potential reproduces either experimental or DFT calculated basic properties of the material studied.
Moreover, the non-planar cores have symmetry properties that lead to a number of unexpected asymmetries in the choice of slip planes and orientation dependences of the yield stress of single crystals (for reviews see [21, 37-41]).
The stress components other than the shear stress in the direction parallel to the Burgers vector, called non-glide stresses, exert forces upon these displacements and may thus affect the core structure during loading.
Kunc: Electronic Structure Dynamics and Quantum Structure Properties of Condensed Matter {Plenum Press 1985)

An overview of current understanding of diffusion properties of grain boundaries in severely deformed materials is presented.
Below diffusion properties and the effect of SPD-processing on some of these short-circuit paths are analyzed in more detail.
Do twin boundaries produced during severe deformation reveal similar properties?
The diffusion properties of teh recrystallization front were measured in specially designed experiments [26, 48].
Deformation conditions of ECAP processing affect the percolating porosity.

At the same time, the temperature increase (depending on different conditions – the magnitude of the fire load, the factors of the microclimate of the room, etc.) sometimes differs from the conditions of the standard mode, so in this work, when studying the process of self-ignition of wood samples, we considered several modes of increasing the temperature over time.
Extractive substances are involved in the formation of coke, affect the formation of smoke.
In order to better study the properties of fire danger of wood, it is necessary to continue testing with other types of hardwood, as well as to study the possibility of reducing the fire danger of wood samples by applying to their surface flame retardants made from available components.
Study of the effect of flame retardant on the properties of wood materials.
Engineering formation of a nuclear power plant safety system // (2018) International Journal of Mechanical Engineering and Technology, 9 (10), pp. 1406-1414 [9] Abramov R.A.

It negatively affects the behavior of this material at low temperatures.
Apparently, such ambiguous behavior of steels depends on the nature of the material, its chemical composition, structural phase state, and other factors.
Aleksandrov, Ob’emnye nanostrukturnye metallicheskie materialy: poluchenie, struktura i svojstva, Moskva, 2007 (Bulk Nanostructured Metal Materials: Production, Structure, and Properties) [in Russian]
Maier, etc., Annealing behavior of ultrafine grained structure in low-carbon steel produced by equal channel angular pressing, Materials Science and Engineering A - Structural Materials Properties Microstructure and Processing. 1(581) (2013) 104-107
Syromyatnikova, Vliyanie rezhimov termoplasticheskoj obrabotki na mekhanicheskie svojstva i mekhanizm razrusheniya nizkolegirovannoj stali pri nizkih temperaturah ispytaniya, Fundamental'nye issledovaniya. 2(1) (2015) 30-35 (Influence of thermoplastic treatment modes on mechanical properties and fracture mechanism of low-alloy steel at low test temperatures) [in Russian]

In terms of building physics are the most significant variables especially boundary conditions, that affect the construction.
Temperature Factor of Structure Internal Surface.
Sufficiently high temperature of structure surface θsi and low relative humidity of the indoor air φi,r are the main factors that ensure the prevention of condensation of water vapor on the surface of structure and thus it precludes subsequent mold growth [9,12].
However, in the case of values characterizing the properties of the internal environment they are significantly influenced by the way of use of the building and design values can differ significantly.
Determination of optimal number of collectors depends on many other factors that can´t be primary taken into account in the calculation.

Design of air-lock valve of the mesh roller-type unginned cotton and film remnant separator Honglei An 1, 2, Ruoyu Zhang 1,2, Za Kan 1,2, Xiaoliang Li 1,2, Yinglan Jiang 1,2 1Machinery and Electricity engineering College of Shihezi University, Shihezi, 832000, China 2Key Laboratory for Agricultural Machinery of Xinjiang Production and Construction Corps, Shihezi, 832000, China E-mail: shz-jyl@163.com Key words: air-lock valve, unginned cotton, material properties, film Abstract.
After the separation, the unginned cotton in the air-lock valve is mainly affected by the force of its own gravity, centrifugal force, frictional resistance and supportiveness from the blade, the analysis of force unginned cotton is shown in Fig. 3.
The correction factor was different under the different wind pressure, yield, and cotton flow velocity.
Design of the slop of side plate for air-lock valve Part of the unginned cotton contact with the side plate during the process of falling, so the friction force is an important parameter which affects the design of the slop of side plate for air-lock valve.
Journal of Guangdong Mechanical Institute, 1996, (04):36-39, In Chinese