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In this work, theoretical and experimental research in areas such as evaluation mechanism, formation mechanism, influencing factors, control methods of impact line are carried out to meet the needs of the community.
The mechanical properties of the material 1 # used in this simulation are displayed in Table1.
Table 1 Mechanical properties of material 1 # code t [mm] E [MPa] σs [MPa] n r0 r45 r90 1# 0.7 2.07×105 194.2 0.231 1.744 1.917 2.401 Impact line evaluation methods.
The basic mechanical properties of the materials (1 # and 2#) in this experiment are given in Table1and Table 2.
Table 2 Mechanical properties of material 2 # code σs [Mpa] E[Mpa] σb [Mpa] δ[ %] 2# 194.2 2.07×105 315 33 Measurement of impact line.

Therefore, the transition layer is prone to be damaged under effect of vehicle load and some environmental factors, which affects the stress state and reliability of the surface slabs.
And performance of the transition layer can be analyzed via the microstructure and the tests of macroscopic mechanical properties.
Thus, it is necessary in the engineering projects to carry out analysis and tests on the interlayer mechanical properties, with consideration of the field conditions [7].
In order to better evaluate the field mechanical properties between cement concrete slab and LCB, as well as to systematically analyze the slab-base interface characteristics, the research in this paper developed a mobile interlayer direct shear apparatus for the field tests and prepared specimens with different types of slab-base binding condition for direct shear tests.
This also indicated that, for the pavement without bond-breaking layers, when warp occurred to the surface slab due to temperature changes or interfacial passage occurred, the transition layer was in the most unfavorable state and its fatigue properties would be affected [1]. 3.

The other is the so called thermo-mechanical coupled analysis, which means thermal and stress analysis performed consentaneously.
Table 2.Welding process specification process torch No. diameter of the weld wire [mm] weld current [A] weld voltage [V] weld angle [degree] weld velocity [m/min] Inside SAW 1 4 1200 32 -15±2 1.60 2 4 700 34 0±2 3 4 600 36 18±2 4 4 500 38 30±2 Outside SAW 1 4 1300 34 -15±2 1.70 2 4 600 36 0±2 3 4 550 38 18±2 4 4 500 40 30±2 parameters variety allowed weld current: ±18%;weld voltage: ±10%; weld velocity: ±10% Material properties.
Regarding to the material properties of the steel, MA Bo, PENG Yan, LIU Yunfei and JIA Bin [4] research on the constitutive relationship of X80 steel at temperature higher than 900℃.
Flow stress curves at temperture of 1100℃ LI Yajuan and LI Wushen[5] have researched on numerical simulation for the temperature distribution of X80 pipeline steel and given thermo-mechanical properties for X80 steel as showed in Fig. 5.
Thermo-mechanical properties of X80 steel according to LI’s research Then, in order to improve the accuracy, both of them is used in such a manner: (2) Thermal model.

These properties depend on the structure of metallic glasses, which is meta-stable in nature.
Inoue et al [1] and Kovneristyj et al [2] have reported excellent thermal and mechanical properties of Cu-Zr-Ti alloys.
Among various other factors that affect the value of Tx in a metallic glass, atomic size mismatch is one.
Reduction in free volume & diffusivity, electron to atom ratio, differences in electro-negativities, are few other factors that are responsible for variation in Tx.
Kurosaka, Thermal and mechanical properties of Cu-based Cu-Zr-Ti bulk glassy alloys, Mater.

The tensile strength of joints depended on these factors.
In general the diffusion bonding method in vacuum with active solder was selected in this joint system because of the much difference of mechanical and physical properties such as melting point, thermal expansion coefficient, Young's modulus.
Bonding temperature, bonding duration time and bonding pressure were investigated as the experimental factors to obtain the suitable bonding conditions in the PECS method.
It indicate that the interface strength increased with the increasing the bonding temperature, but the residual stress affected to the strength over 753K.
It assumed that the following factors affects to this case on the distribution of bonding strength for the sliced butt shape specimen

The relaxation factor clearly reveals two relaxation processes involving in slow relaxation and fast relaxation of the quenched liquid TiAl film.
Concerning the studied film, the obtained results reveal how quenched temperatures affect local structure changes.
Introduction As an important intermetallic compounds, there is increasing scientific and commercial interest in the development of nano-structured titanium aluminides films due to their unique mechanical, electronic, magnetic, and optical properties [1,2].
Hence, to properly control final microstructures and properties, knowledge of the crystallization kinetics of the film is required.
The quenched temperature strongly affects interchange movements among the atoms.

Spring back is not only affected by the tensile strength and stress but also influenced by the thickness of the plate, bending radius and angle.
The spring back issue has been studied over the years to compensate for the undesired shape errors and to identify the influence of main factors, such as material of workpiece, tooling geometry, and process parameters, on the amount of spring back, both experimentally and numerically.
This is caused by the elastic properties of the metal and the strain change that produced by the elastic recovery.
International Journal of Mechanical Sciences. 40(7) (1998), p. 631-650
Nandedkar, Factors Affecting on Springback in Sheet Metal Bending: A Review

Other studies have focused on the mechanical properties of these mortars [24]; [3]; [25]; [9]; [20].
The following properties of mortars specimens were determined: compressive and flexural strength and water absorption by capillarity.
In the following results is shown the hardened properties of mortars containing kaolin wastes as pozzolan and inert material.
F., Kaolinitic calcined clays: Factors affecting its performance as pozzolans.
[36] AMBROISE, J.; MAXIMILIEN, S. e PERA, J., Properties of metakaolin blended cements.

Furthermore, conventional techniques have difficulty in finishing advanced engineering materials such as silicon nitride, silicon carbide and aluminum oxide, etc. with super-finishing, accuracy and less surface defects because of their rigid tool which affects advanced engineering properties for these materials [50].
This medium is a mixture of abrasive particles with polymeric materials to form cutting tool with required rheological properties to finish the workpiece.
Also, they determined that machining time, type of abrasive, concentration of SG, and mesh number of SG were the most important factors to dominate the behavior of surface roughness.
The researchers have found that magnetic field, concentration of abrasive particles, working gap and feed rate had significant effect on surface roughness, while rotational speed and lubricants were not important factors affecting surface roughness.
Weight of abrasives was found to be the most significant process parameter affecting the material removal rate.

Machinability can be applied to provide the basis for determining the optimum machining parameters, and to design ceramics with better machining characteristics by choosing the desired mechanical properties.
The alternatives affecting machinability mainly include two aspects, material properties and machining parameters.
Therefore, the set of alternatives can be composed of mechanical properties of ceramics including Young’s modulus, hardness, fracture toughness, flexural strength, Weibull modulus, etc. 2.
The material properties are listed in Table 1.
Considering the relationship between mechanical properties and machining processes, the fuzzy normal distribution µ(x) is selected as the membership function