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The particular thermo-mechanical history of each point in different experiments was then reconstructed by FEM analysis.
It is known that mechanical properties of the products are closely dependent on the microstructure, which in turn is affected by the thermo-mechanical history, as it is determined by the process sequence [1-5].
Main factors influencing the mechanical, corrosion and aesthetical properties of the product, as well as the ease of extrusion, are the grain size and the presence and distribution of intermetallic compounds.
Particular care was taken in determining the friction factor governing the process, as it was determined by the particular lubricant used at the toolmaterial interface, inasmuch as it affected the strain and strain rate distribution.
A mean friction factor of 0.23 was then used in the process simulations.

This paper study on the influence of ultrasonic vibration assisted grinding (UAG) process on surface topography and properties of C/SiC composites.
The excellent corrosion resistance, high temperature resistance and mechanical properties make CMC widely used in thermal Protection system.
Uhimann [9] found the thermal burns, physical and chemical properties changes of work piece surface could be avoided.
The mechanical properties and microstructure of the C/SiC composite material are evaluated.
It can be directly reflected the influence of the factors on the surface topography.

The friction coefficient of composite is scarcely affected by the alumina content.
To improve the mechanical properties, particularly fracture strength and toughness of Al2O3 ceramic composites, Mo-based composites reinforced by in-situ Al2O3 ceramic particles were developed in this paper, and the properties were researched.
So the actual density of composites depends on the combined action of above two factors.
The friction coefficient of composite is scarcely affected by the alumina content.
The friction coefficient of composite is scarcely affected by the alumina content.

Element analysis.Displacement mode is selected, you can conduct the analysis of cell mechanical properties.
Modeling process, the premise does not affect the calculation results on the slope line appropriate to simplify.
Its mechanical properties parameter synthesizes the suggestion by the local experience and the similar stratum experience is: Supporting capacity characteristic value fak=110KPa, modulus of deformation E0=0.01GPa, cohesive force c=5KPa, angle of internal friction =12°; gravelly soil: structure , medium dense , medium compression .
The stability of the factor analysis using finite element method.
Comparative table of the stability factors Computation number of times Safety coefficient Gravity load ratio method 1 1.41 Strength Reduction 7 1.5422 Contrasting the two kinds of methods can explain the science and rationality of the gravity load ratio method.

Prediction of Effective Material Property of Tailor Welded Blanks for Air Bending Process Yongchuan Duan1, a, Yingping Guan1,b and Xingdong Ma3,c 1School of mechanical engineering, Yanshan university, China ayongchuan.duan@ysu.edu.cn, bgyp@ysu.edu.cn, cmaxiangdong86@yahoo.cn Keywords: Tailor welded blanks, Artificial neural network, Effective material property, Simulation Abstract.
The function relationship between ratio of the width of TWB to the width of weld and uniform elongation was determinated. it is found that the width of specimen less than 20 mm affects the property of TWB greatly, explained by Lin et al [7].
Table 1 Mechanical property for DQSK n K(MPa) E(MPa) 0.1881 527.58 2.070E+005 In the postprocessor of FEM code, the total force of the nodes specified displacement boundary condition was obtained from the reaction force of FEM.
Here trainlm algorithm is used to adjust weight factors and thresholds for the ANN model.
The adjustment rate of weight factor is given by [15]

The Effect of Boundary Structure on the Mechanical Properties of Aluminium Alloys Erik Nes 1, a , Bjørn Holmedal 1,b and Børge Forbord2,c 1 Norwegian University of Science and Technology (NTNU).
This work reviews the mechanical properties resulting from plastic deformation and annealing of aluminium, looking at alloys which prior to annealing was subjected to both severe plastic deformation (ECAP) and more conventional deformation by cold rolling.
The effect of the resulting microstructures on the subsequent work hardening properties are model, applying the new microstructural metal plasticity model (MMP-model) developed in Trondheim over the last decade.
A new approach to the modelling of the effect of grain size on the mechanical properties of aluminium and aluminium alloys has recently been proposed by Nes et al. [16].
Further, these alloy variants contain a high volume fraction of finely dispersed particles, the effect of which on mechanical properties was neglected in the previous treatments.

The two main factors in the processing were described.
After items and systems tests, we fixed some factors affecting on processing.
Main factors affecting on processing efficiency are grinding speed, free abrasive grains and composite lapping plate, etal.
These tow factors of grinding speed and grain size play a different effect from common grinding.
Grinding speed is the main factor affecting the processing efficiency.

Polycrystalline Diamond (PCD) is one of the popular materials in industry because of its superior mechanical properties.
Through statistical analysis it was found that clearance angle affected cutting forces more significantly than the other parameters.
These properties make PCD superior to conventional tool materials [3].
To simple the analysis of relevant factors, the tool paths applied were straight lines along the edge of the workpiece.
Table 3 Conspicuousness value of factors Factors Front angle Cutting edge angle Clearance angle 0.23 0.36 0.64 From Table 3, it can be seen that tool performance could be improved more effectively by choosing the correct clearance angle according to the F-value.

Effect of Mechanically Activated Layered Silicate on the Properties and Structure of Polytetrafluoroethylene S.A.
As shown in [4], when choosing the treatment regime for a substance, the main factors are loading conditions (external force, impact speed, contact time), exposure conditions (free or cramped impact, temperature, etc.), properties of the material to be crushed (mechanical and thermal properties).
It should be noted that the low value of thermal expansion is one of the main factors in the development of sealing seals based on PTFE for highly loaded friction units.
Studies of the effects on solid-state properties and reactivity produced by treatment in various mechanical devices in: F.Delogu, G.
Peculiarities of structure and properties conditioned by microphase separation, Pure & Appl.

Welding Current Dependence of Dynamic Mechanical Properties for Spot-Welded Electric Arc Furnace Steel Sheet Masaaki Itabashi1, a * 1Department of Mechanical Engineering, Tokyo University of Science, Suwa, 5000-1, Toyohira, Chino, Nagano 391-0292, Japan aemail itabashi@rs.suwa.tus.ac.jp Keywords: Spot welding, Nugget diameter, Electric arc furnace steel, Dynamic mechanical properties, Welding current Abstract.
Introduction Automotive structure is made of blast furnace steel, because mechanical properties of such a structural steel are controlled precisely.
Then, mechanical properties of the steel are relatively scattered.
Fig.13 Welding current dependence of dynamic mechanical properties Fig.14 Welding current dependence of quasi-static mechanical properties Summary The sheet of 980-MPa grade electric arc furnace steel of 1.0 mm in thickness was evaluated in the form of single-lap spot-welded tensile-shear specimen.
Harding (Ed.), Mechanical Properties at High Rates of Strain 1979, Institute of Physics, Bristol and London, 1979, pp.71-80