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China Email: wsmsuccess@163.com Keywords: Sheet metal forming; Air-bending; Springback; Finite-element method; Numerical simulation Abstract: In this paper, the influencing factors of springback for air-bending of sheet metal are introduced.
Quality amplification factor was set to 10. 
Figure 5 The influence of press amount of punch on springback 5) The influence of sheet properties on springback The influence of different sheet properties on simulation springback results is shown in Figure6.
Figure 6 The influence of sheet properties on springback 4 Method for controlling springback Influence factor of the springback was analyzed above.
International Journal of Mechanical Sciences, Vol. 51 (2009), p. 732-740

Besides the factors of material composition, the storage medium (artificial saliva), temperature (37oC), and contact area (surface area exposed to artificial saliva), another factor that affects the rate of ion release is the immersion time.
The composition and filler load affect the mechanical properties of the material.
Mechanical properties generally increase along with the increase of filler load.
Fluoride Releasing Restorative Materials: Effects of pH on Mechanical Properties and Ion Release.
Comparative Evaluation of Mechanical Properties of a Bioactive Resin Modified Glass Ionomer Cement.

The conductive ceramic based composites, nowadays, are manufactured by some special processes [5] Ahmad and Sueyoshi (2010) [6] have studied the effect of sintering temperature on the mechanical properties and electrical properties of silicon nitride and titanium nitride composites.
• From the each level affecting factors in GRA is A2B1C2D3.
Here Pulse on Time influences more compared to other factors.
Microstructure and mechanical properties of silicon nitride–titanium nitride composites prepared by spark plasma sintering.
Properties of Si3N4–TiN composites fabricated by spark plasma sintering by using a mixture of Si3N4 and Ti powders.

Introduction There are several different ideas about polypropylene fiber impact on the mechanical properties of concretes, especially the influences on the compressive, axis compressive and splitting tension strength in literatures at home and abroad, and as for the idea that polypropylene fiber can improve the strength of concretes supported by fibers suppliers, it’s considered to be selective generally.
As for the above overviews of some experimental researches, some scholars have their opinions, they think the splitting tension and compressive strength of fiber concretes are affected by many factors, such as kind of aggregates, particle diameter, grading, W/C ratio, specimen size and shaping condition, curing time, test method, and the fiber type, fiber content, fiber length and slenderness ratio, etc.
Therefore, this paper made an experimental research about the influences of polypropylene fibers on mechanical properties of concretes from the angle of the strength grades of concretes.
The specimen were cured under the same conditions (C20 test specimen were cured under the standard conditions，C30 and C40 test specimen were cured in water before testing), until testing at the age of 7, 14, 28 days, the concrete mechanical properties test was took according to Standard for test method of mechanical properties on ordinary concrete GB/T50081-2002.
Influences of polypropylene fibers on mechanical properties of concretes A comparison experiment on polypropylene fiber concretes at a fiber content of 0.9Kg/m3 and ordinary concretes was made.

Both theoretical analysis and experimental study were held on the effects of many factors to the deburring results.
Recently the miniature holes are mainly fabricated by mechanical drilling, but drilling always generates burrs along the edge of the holes, which severely affect the accuracy, quality and performance of the parts [1].
M-ECD is sensitive to various processing parameters and material properties, such as electrolyte composition and concentration, processing current, inter-electrode gap, initial burr height, so it is difficult to exactly predict whether the burrs are removed completely.
The processing parameters and workpiece material properties considered for this purpose are exhibited in Table 1.
But there are still some errors caused by many factors.

Introduction The widespread red-bed soft rock in the west region of Yunnan province is characterized by bad engineering properties, which impose adverse impacts on the construction and operation of highways built in this region [1].
To make the matter worse, this region is frequently affected by earthquakes with large intensity.
The stability factors at different slope heights and ratios are calculated by using strength reduction [4], and the correlation between slope stability factors and heights is deduced.
As is shown in Figure 6(a), where only the gravity load is considered, the stability factors of the slopes at the same ratio but with different heights tend to exhibit non-linear change, while at different slope ratios; the polylines of the stability factors are nearly parallel to each other.
Fig. 5 A picture of the stability factors of a slope 9m in height and 1:0.75 in slope ratio (a) under gravity loading (b) under seismic loading Fig. 6 The tendency of the slope stability factors Calculation of Slope Critical Height.

Introduction As reported already, graphene exhibits a huge number of remarkable electronic and mechanical properties, such as unconventional integer quantum Hall effect[2]-[3], ultrahigh electron mobility[4]-[5], which is possible to arrive at 2 million cm2/Vs even at room temperature, structure of hexagonal symmetry lead to electron-hole symmetry[6]-[7] and ultrahigh thermal conductivity at about 3000~5000W/mK which is as well as CNT[8].
Some exotic properties, like absorbing hydrogen at low temperature[9], di-pole semiconductor feature displayed in experiment[10], Ballistic transport in room temperature[11], et al.
There are two main factors which influent the quality of graphene deposited on thin nickel layers, one is the sort of metal which graphene grown on, and the second is the rate of cooling after heating CH4 where carbon atoms original from.
The quality of SiC played a magnitude role in affect the surface morphology of graphene[17,18,19].
Less foreign matter adhered on the surface may be the most significant advantage in pyrolysising to grow graphene, as shown in Fig.1 (c) Applications The potential application of graphene must be no doubt to be the substitute of SiO2 used in transistor as channel, for the superior electronic and thermal properties.

From this arises the need to work with environmentally friendly materials that apart from having an easy recycling process reduce the weight of the element without affecting the mechanical characteristics [3, 4, 5].
This is the specific case of horsehair which is only used for decorative or clothing purposes, wasting its great mechanical properties [6, 7].
Subsequently, the regulations to be followed are revised to obtain the test pieces and the equipment used to determine the mechanical properties in the different tests.
A review on chemical and mechanical properties of natural fiber reinforced polymer composites.
Standard test method for tensile properties of polymer matrix composite materials.

So that it is very important to study the resistance to crack initiation properties of HDPE pipe and its butt-fusion welded joint.
Fracture properties can be expected to be governed primarily by the degree of crystalline, even though this parameter is just one of the many factors which characterize the semi-crystalline state.
So the degree of crystalline is thus the first structural variable that to be related to fracture properties at different zone of butt-fusion joint.
At the same time for polymer material, the degree of crystalline decides its mechanical property.
The test of basis mechanical property shows the same results.

Quantum mechanical calculations of the electronic structure of hydrogen storage materials have undoubtly deepened our fundamental understanding of their basic properties.
In this paper, we focuss on the latter aspects, we discuss the electronic and elastic properties of Haucke compounds of AB5 type (A=La or Y, B=Ni), in relation with their hydrogen absorption properties.
Substitutions at the La and Ni sites have been extensively used to modify the thermodynamic properties of LaNi5 and play a crucial role in the selection of the alloy for specific technological applications [12-15], since they affect the stability and the hydrogen content of the hydride.
These elastic and electronic effects affect in turn the hydrogen absorption properties relevant to applications.
Elastic properties.