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Introduction As one kind of potential structure materials which can be used in high temperature, TiAl alloys have shown high specific strength, high specific stiffness and excellent mechanical properties in high temperatures [1].
And the sandwich structure made of TiAl alloys has shown greater carrying efficiency and high temperature mechanical properties, which have demonstrated broad applications in the manufacture of aircraft fuselage, thermal protection system and so on [2,3,4].
However, the superplastic deformability of the TiAl sheet is determined by several complex parameters, such as the friction between metal sheet and mold, the size and shape of mold, material properties and loading process.
All these factors can lead to nonuniform thinning or rupture of the sheet, which limits the application of sheet superplastic bulging.
Table 1 Structure parameters of the 1/4 model Length [mm] width [mm] height [mm] Thickness of sheet [mm] Radius of mold fillet [mm] Side wall rake [1] 30 26 13 1 3 0.154 Material properties.

The hexagonal metallic materials such as magnesium and titanium alloys, which have many advantages of low density, high specific strength, thermal properties, damping capacity, fatigue properties and machinability, provide great potential to reduce weight and replace the commonly used structural materials [1-3].
Hexagonal materials are generally characterized by highly anisotropic mechanical properties due to the pronounced texture that develops after deformation processing.
This is reasonable that the schmid factors for different deformation modes depend on the corresponding specific crystal orientation under the identical applied stress tensor.
The plate texture basically affects the subsequent production process and the resulting mechanical properties.
By comparison, increasing the friction coefficient is an efficient means for weakening the basal texture and improving the forming properties.

On this basis the foundation settlement factors was analyzed systematically that focus on the elastic modulus of pile, pile spacing, pile diameter and pile length in foundation treatment, especially for the characteristics parameters of contact element.
Because the roadbed left and right sides are symmetrical, in order to reduce the computing workload, the physical and mechanical properties of cement-soil compaction pile is adopted which has been disposed to replace the original pile, and the half structure for numerical calculation of composite foundation is taken.
Reasonable mechanical model has been established, appropriate mechanical parameter has been chosen and then the mechanical characteristics of structure-soil surface is understood in depth.
Two element parameters which affect pile settlement significantly is analyzed, that is ultimate shear stress and shear modulus.
On this basis the foundation settlement factors is analyzed systematically.

The project is due to manholes surrounding backfill not dense , there is no hierarchical compaction required , fillers poor quality , poor moisture control and other factors affecting the compaction effect , caused by too much work for the settlement . 2 sewer project construction quality control points 2.1 Quality control pipe .
Quality control during excavation should take the following points: 2.3.1 Slope Landslide Control First of all, the former location of the pipeline trench excavation by construction patterns in the field put on the line , the excavation methods are manual excavation ( excavation with hand tools ) , mechanical excavation ( excavators excavation ) , should also be adopted in case of lots of rock blasting excavation .
According to soil type , soil mechanical properties to help determine the appropriate slot slope .
Secondly , try to make the mound excavation trench excavation on one side and the other side can be placed transported to drain to be installed , must not allow the drainage ditch was excavated placed side out soil buried. 2.3.2 Control section of the trench slotted wide cross-section from the bottom , deepened , bottom , and between the layers slope gradient layer width and other factors to determine the remaining units .
Tube should be adopted under the crane , the crane should be opened along the trench line and away from the edge of the ditch should be greater than 1m, in order to avoid the trench wall collapsed, affecting the stability of the trench slope.

Introduction Surface tension is the governing factor in all processes of cutting, welding, soldering, and joining.
Due to the fact that material is affected by the thermal-mechanical process, through an interaction with the laser beam, knowledge on stress and deformation analysis for the application and the process of monitoring is ideal.
The equation of mechanical equilibrium is defined as (2)
A decrease of Emat and ρ with depth h is expressed by the attenuation factor cos δ by Equations (11) and (12)
A technological constant KcutL = f (Wlas, vp, p, d) affects the surface roughness, i.e. the surface deformation and the achievable depth of cut and analogously affects the surface tension σsurh.

Nano-particles are nowadays used in the production of food packaging, which improves the barrier properties, mechanical properties, that has been confirmed [1-9].
Analytic measures Mechanical property test The mechanical properties including Tensile Sress, Young Modulus, Yield Strength, Maximum Rupture Stress, and Elongation at break, were tested according to standard of ASTM 638.
Results and discussion Mechanical property The effect of nano- SiO2 (NS-2) with different content on mechanical property is showed in table1.
Table 1 Effects of nano-SiO2 on PP’s mechanical property Sample No.
The improvement of printing and laminating performance related to the some factors, example, process condition, and dispersion of nanoparticle as filler that needs to further exploration.

The epoxy resin packaging material is made up of epoxy resin, filler and curing agent, and can provide mechanical support and insulating property for the integrated circuit board.
Besides, the filler will affect crystallinity and crystallite size of the polymer so as to change its thermal conductivity.
Based on the above analysis, filler was supposed to distribute evenly in the resin, and the mathematical expression is as follows: Lgλ = VC2 lgλ2 + (1-V) lg (λ1C1 ) (2) C1 - influence factors of crystallinity and crystallite size of polymer, C2 - free factor of formation of heat conductive chain.
The relative factors have been calculated and processed by equation (3), as shown in Table 1.
The preparation and properties of epoxy molding compounds filled with multiple ceramic particles.

By simply rotating the samples on each consecutive pass, therefore by changing the shear plane and the shear direction, controlling the microstructure and the texture of processed material is made possible, therefore becoming possible to control its mechanical properties [11].
Such superior mechanical properties are highly desired when manufacturing advanced structural materials.
Valiev, Microstructure and properties of pure Ti processed by ECAE and cold extrusion, Mater.
Hong, Mechanical properties and microstructures of an AZ61 Mg alloy produced by equal channel angular pressing, Scripta Mater., 47 (2002) 39-44
Fodor, Influence of ECAP routes on mechanical properties of a nanocrystalline aluminium alloy, Per.

The paper make the service life of relieving formed milling cutter as the optimization objective, proceed the simulation study on the mechanical degree of cutter, cutting data.
The results indicate that the finite element simulation of the metal cutting processing can analyze quantitatively some physical properties, such as the cutting force, stress, strain and so on, the traditional way of qualitative analysis is changed.
The finite element simulation object of metal cutting processing is the reaearch that the relevant factors of cutting influence the working life of tool.
Mechanical model of the forming milling cutter In the paper, the research tool is the shovel teeth forming cutter which milling circular trough, the local cutting processing of forming cutter is showen the figure 1. ap is the width of the cutting layer which is ready to cut, ae is the depth of the cutting layer which is ready to cut, af is the feed per tooth. v is the feeding speed of workpiece.
The extremum problems in the milling process is discussed, the cutting layer thickness in the actual milling is a variable, the maximum is af, we should build the orthogonal cutting model, which is shown as figure 4, the setting of the cutting layer thickness chip extreme value af, it won't affect the results of problem.

The experimental results above show that the carbon content is the main factor to affect the morphology of martensite in steel.
The new phase martensite keeps semi-coherent relationship with the parent phase austenite during the formation of martensite in steel and there are high density dislocations in the phase interface, so the strain energy depends on the volume difference between the new phase and the parent phase, the shape of the new phase and the mechanical property of the parent phase [1].
So carbon content is the main factor affecting the morphology of martensite.
Conclusions (1) The carbon content is the main factor to affect the morphology of martensite in steel.
Trans., Vol. 2(1971), p.2373 [9] Zhaoji He: Mechanical Properties of Metal (Metallurgical Industry Press, Beijing 1982) (In Chinese).