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The bending properties of high strength precipitation-hardening AA6016-type Al alloy thin sheets in pre-aged T4P temper state were studied in this work.
Microstructural features like grain boundary particles distribution and volume fraction of the matrix strengthening phases were considered as factors controlling the mechanical properties and the fracture of this grade.
Only by providing both, homogeneous distribution of the matrix strengthening phases and a favourable grain boundary structure, the severe and often contradictory requirements for the functional properties of these alloys can be successfully satisfied.
That is why the cooling rate during quenching is the most critical parameter determinative for obtaining satisfactory fracture properties of these alloys.
However, the macro-appearance of the bend was not affected and this sample showed good hemmability.

Calculating safety factor of accumulation body under different working conditions: According to calculation results of EMU programs: 1)Stability safety factor of accumulation body is above 2.5 under natural condition while the safety factor of most dangerous sliding surface is about 2.0, which indicates that the side slope of accumulation body is stable. 2)Affected by earthquake load, the safety factor of side slope declines but is still above 1.5, which meets the stability requirements. 3)When impounding level reaches a normal height, dangerous sliding surface are found in section III and its safety factor is below 1.0(0.824).
Safety factor will decrease under the working condition of impounding and earthquake.
Due to water soak, the mechanical property of accumulation body below water surface declines leading to plastic flow, large displacement and partial sliding of pull-type and stage-by-stage.
Due to water soak, the mechanical property of accumulation body below water surface declines leading to plastic flow, large displacement and partial sliding of pull-type and stage-by-stage.
A method o f calculation of total factor of safety slopes by elasto-plastic FEM [J].

If the cooling achieved is sufficiently fast the crystallographic growth of the material can be manipulated to obtain specific properties observable in the mesoscale.
Two form factors will be considered 4.6 mm and 15.8 mm, these are not nominal integer values in order to facilitate the implementation of the finned structures that will be discussed later.
For the 4.6 form factor the side (S) is 9.8 mm and for 15.8 form factor is 33 mm [Fig. 6].
Table 2- 4.6 form factor.
Table 3- 15.8 form factor.

In addition, the effect of air, electric field and other factors would accelerate the aging of oil under certain conditions [4].
The prevention and elimination of the particulate pollutant in the transformer oil If the transformer oil was polluted by mechanical impurity particles, it could cause deterioration of oil’s dielectric strength, dielectric loss, volume resistivity and other electrical property.
The more mechanical impurity particles in the oil, especially large particles, the worse the electrical property and insulating property of oil would be.
Make sure that the glue, paint and other materials used were compatible with the transformer oil, and they would not peel off or break down and affect the oil quality [7].
Because of the production process factors, operating factors and the neglects during work, there might exist large particles in the oil such as copper, iron, fiber, etc. [7].

The mechanical properties of bamboo culms are better than ordinary wood, and bamboo culms have good flexibility and toughness.
Marco Invernici[5] applied a finite element method to analyze the original bamboo beams mechanical properties.
The mechanical properties of bamboo culms test methods include: bamboo culms axial compressive strength test, tensile strength test, parallel to the bamboo culms axis shear strength test.
:Bamboo / poplar Composites bond performance and its influencing factors.Chinese Academy of Forestry Sciences, China 2009 [7] Zhao X.S.: Based on ANSYS Software bamboo surface compression process analysis.
:Building mechanical properties of tensile strength parallel to the grain bamboo Test Method.

Introduction Oil drilling platform can generate noise up to 100dB, seriously affected the health of people's lives.
Setting the parameters of sound-absorbing cotton material as follows, density is 10kg/m3, the structure factor is 2, impedance is 40000rayl / m, porosity is 90%.
Table 1 shows the material properties of each component.
The properties of acoustic panels and shutters material name Thickness (mm) Density (kg/m3) Damping factor Poisson's ratio Modulus (×1010N/m2) steel 1.5 7900 0.001 0.3 21 Damping rubber sheet 25 1200 0.25 0.4 0.16 Composite rock 45 500 0.4 0.1 0.07 According to on-site field measurements, we set a plane wave sound source 2m away from the noise components, set calculated points 1m away from both sides of the board for measuring the transmission loss of sound insulation.Figure2 shows the amount of noise reduction.
The rear of the body and the connecting drive shaft are switch to switch sound glass door, which reduces the gap and does not affect the normal maintenance.

Therefore, the research on the fatigue properties of rail joint bolt has important practical significance.
By rail joint bolt working conditions and material properties, the basic S-N curve with a power function is applied, take k = 0.35, S=940MPa.
The next work is setting the material properties of the bolt, building the contact pair, meshing generation, applying boundary conditions and load.
Fig. 3 Fatigue life of rail bolt Fig. 4 Safety factor of rail bolt As can be seen from the above chart, the rail joint bolt has a lower safety factor at the root of the bolt thread.
Mechanical Design [M].

However, the production by sand casting possesses low mechanical property and the inner pore which will decrease the lifetime and security of the flange.
Finally, the best process parameter and the order of effect of factors are obtained.
Three factors and three levels are taken into consideration in this research, but we do not include the interaction among the factors.
Table 1 is the factors and levels for L9 orthogonal array.
The F values of factors A and C shown in Table 4 have no obvious differences, and both of the factors show significance.

Analysed data of crack growth and threshold conditions are a basis for an application of damage tolerance philosophy, which is in case of pressure vessels quite a complicated task due to several reasons: combination of high cycle and low cycle loading with overloading cycles and a very large number of affecting factors as regards corrosion environments like load frequency, waveform, strain rate hold time, environmental parameters - solution composition, corrosion potential, etc. [1,2].
Mechanical properties were: strength 634 MPa, yield stress 507 MPa, ductility 22 %, reduction area 68 %, notch toughness 210 J/cm 2.
The dependence of U-ratio on the actual stress intensity factor range ∆K related to the FCG diagram is shown in Fig.1. 1.E-10 1.E-09 1.E-08 1.E-07 1.E-06 1.E-05 1.00 10.00 100.00 Delta K / Delta Keff (MPa m1/2) da / dN (m/cycle) Delta K (air) Delta Ke ff (air) y = -1.123E-09x6 + 2.812E-07x5 - 2.770E-05x4 + 1.374E-03x3 - 3.619E-02x2 + 4.810E-01x - 1.567E+00 0.2 0.4 0.6 0.8 1 1.2 5 10 15 20 25 30 35 40 Delta K (MPa m1/2) U = Keff / K K/Keff (air-extrapolated) K/Keff (air-measured) Fig.1: FCG in pressure vessel steel in air, R=0.1 evaluated as dependence of both both ∆K and ∆Keff Fractographical analyses were carried out to explain the crack closure growth in the nearthreshold region.
Oung: Factors Affecting the Crack Growth Rates of Reactor Pressure Vessel Steels under Simulated Boiling Water Reactor Conditions.

Furthermore it affects the exchange rate.
Therefore the fluctuations of oil prices should be the monetary factor.
(F-statistic) 0.000 Simulation results are given to illustrate the excellent performance of the statistical properties.
Fig.3 Statistical properties of the fitting equation Although regression results in Table 1 confirm the close relationship between the Brent oil price and the U.S. dollar liquidity, the exchange rate, do not yet confirm that they can decide Brent prices.
Its fluctuation will affect the dollar exchange rate and the liquidity of the global market, thereby affecting the global economy, including china’s economy.