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The exploration of microstructure and mechanical behaviors during the plastic working of H-beams is of great significance for improving the product properties.
Since rolling parameters heavily affect the microstructure of H-beams, improved product properties of H-beams can be obtained by optimizing the rolling schedule.
For microstructure evolution during rolling, key affecting factors are strain rate, initial rough rolling temperature, time interval between passes, and other rolling parameters [6].
Specifically, the study focuses on the effect of the above factors on the evolution of austenite during the hot rolling process of H-beams.
This benefits the grain refinement process and leads to improved mechanical properties of H-beams

Various current and proposed CPC applications all have specific setting and hardened cement properties.
In that respect a five-factor, three level central composite design (CCD) was applied to develop an empirical relationship between the response and factors [5].
Response surface model and optimal factors of the system was elucidated, as well.
R2=+140.22-5.77*A+3.59*B+9.32*C+12.50*D+7.02*E-4.73*A*B-8.70*A*C+7.48*A*D+ 6.17*A*E+2.33*B*C-0.11*B*D+2.14*B*E+10.11*C*D+16.98*C*E-13.89*D*E-11.09*A2 – 1.09*B2-19.09*C2-4.09*D2 +6.91*E2 (2) Although all the main factors are affecting the compressive strength response of HA based cements, the seed concentration (D) has the highest effect.
Summary Setting time and compressive strength HA based cement properties can be expressed by the second order polynomial CCD model.

Surface/subsurface processing damage on optical component can severely affect its surface mechanical properties and cause its resistance to external deformation to deteriorate.
At the same time, the processing damage will also affect the surface quality.
The results show that the light intensity enhancement factors can reach 4.7 and 1.9 respectively, when the surface scratches and microcracks are much smaller than the incident wavelength.
According to the Hertz contact theory, the maximum critical deformation depth of the elastic contact is defined as follows [13]: (1) Where Hw, Ew, rw, mw represents the hardness, modulus of elasticity, density, and Poisson's ratio of the mechanical properties of the optical workpiece material, respectively. k is the average contact pressure factor and is generally taken as 0.4.
The following chemical reaction can be expressed as: (3) The electron cloud density between the surface atom and the subsurface atom changes due to the difference in chemical properties of the hydroxyl group and the matrix constituent atom.

Effects of Biaxial Stress Condition for Fatigue Properties of Magnesium Alloy Yasumi Itoh1, a and Akira Shimamoto2,b 1 Graduate School of Engineering, Saitama Institute of Technology, 1690 Fusaiji, Okabe, Saitama, 369-0293, Japan 2 Dept. of Mechanical Engineering, Saitama Institute of Technology, 1690 Fusaiji, Okabe, Saitama, 369-0293, Japan a ito@nrips.go.jp, bshimamot@sit.ac.jp Keywords: AZ31B, Biaxial Stress, Fatigue, Crack Propagation, Biaxial Fatigue Tester, Stress Intensity Factor Range Abstract.
The purpose of this study is to investigate the effect of biaxial stress on the fatigue crack growth properties ⊿KⅠ-da/dN.
As a result, it became clear that existence of a stress parallel to a crack affects crack progress velocity [7] .
The mechanical properties of magnesium alloy AZ31 B-O are shown in Table 1, and the dimension and form of a specimen (cruciform specimen) are shown in Fig.1.
Stress intensity factors KⅠ were computed in FEM analysis using the displacement extrapolation method.

The implementation of crumb rubber has various effects on the properties of concrete depending on several factors such as the amount of aggregate substituted and the size of the crumb rubber.
The implementation of crumb rubber has various effects on the properties of concrete depending on several factors such as the amount of aggregate substituted and the size of the crumb rubber.
Azmi, Strength reduction factors for structural rubbercrete, Frontiers of Structural and Civil Engineering 8(3) (2014) 270-281
Sharma, Mechanical and durability properties of waste rubber fiber concrete with and without silica fume, J.
Wu, Effects of rubber particles on mechanical properties of lightweight aggregate concrete, Constr.

Introduction One of the main problems also severe environmental factors affecting soil properties in the last decades is the acceleration and spread of soil salinity in arid and semi-arid regions around the world [1].
At Sebkha, in fact, the level of the salt water table varies seasonally from 1m under the surface (in the case of heavy rainfall) to 4 meters in depth [3, 4] during the dried season affecting the mechanical properties of the ground soils and raising the question of the stability of the runway.
Not only the similarity between the hydro mechanical properties of these two soils, but also their statistical representativeness of the in situ reality is studied.
In situ, the mechanical properties of two soils are characterized by several SPT and pressuremeter tests whereas the in situ hydraulic properties are heavily known in the scale of the site.
Some physical and index properties of the reconstituted soil in laboratory.

Mechanical properties of the as-rolled sheets.
Figure 4 shows the mechanical properties of the as-rolled sheets.
Mechanical properties of the annealed sheet.
Figure 8 shows the mechanical properties of the annealed Mg-2.0Zn-0.8Gd alloy.
As discussed above, the annealing process has great influences on the microstructure and texture, which affect mechanical properties.

Any accidental (e.g. cracks) or intentional modification in a structure will alert its stiffness and damping properties and affect its dynamic characteristics.
They derived an element stiffness matrix of the beam by integrating of stress intensity factors and proposed stiffness values for closing and opening cracks.
They are functions of the loading, the size and shape of cracks and geometric boundary conditions. 4.2 Determine of the stress intensity factors The idea of equivalent spring to quantify the relations between the loading and the strain of the crack tip macroscopically has become the basic of determining the stress intensity factors by experimental method.
In some simple cases of cracks or notched beams, simple methods for obtaining the approximate stress intensity factors through asymptotic matching have been used [20].
Computers & Structures. 28, 309--313 (1988) [20] Gao, H., Herrmann, G.: On estimates of stress intensity factors for cracked beams and pipes.

These properties make it appropriate for fabricating the aircraft frame, wing truss and tail parts.
The mechanical properties of aluminum alloy 7050-T7451 were shown in Table 1, Table 1 Mechanical properties of 7050 Alloy at T7451 state Modulus of Elasticity [GPa] Shear Modulus [GPa] Eutectic point [℃] Thermal Conductivity [20℃/ W/(m·K)] 70.3 26.9 465 157 Applied cutting tool is provided by Mapal face milling cutter.
Fig.1 Experiment set-up Design of experiments The single factor method was used to conduct the experiment.
The data underlined are single factor parameters.
It is acknowledged that the cutting depth is main factor affecting the cutting force.

This paper studies the influences of factors such as axial compressive ratio and shear wall thickness on the mechanical performance of the reinforced concrete column strengthening with shear wall under low-cyclic reversed loading.
Their mechanical properties are shown in Table 1.
Fig. 1 The sectional dimension and reinforcement of specimen [mm] Table 1 Mechanical properties of materials Materials fy [Mpa] Poisson ratio Elastic modulus [Mpa] Concrete -- 0.167 2.648×104 Longitudinal bar 335 0.3 2.0×105 Stirrup 335 0.3 2.0×105 Constitutive Relations of Materials Constitutive Relation of Concrete.
Taken the length of the shear wall as 200mm, and the axial compression ratio as 0.3 and 0.9, the influence of the thickness on the mechanical performance of two group reinforced column is analyzed.
Conclusions Axial compression ratio is the important factors that affect seismic performance of the components.