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Grinding efficiency depends on reasonable choice in grinding depth and feed, but it’s also related to parts shape, machine tools state, grinding liquid state, grinding wheel dressing more than 30 variable factors [1].And electrolytic dressing joins in ELID grinding machining.
As a data in engineering database, its source affects reliability of related data in the experience database directly.
In fact, in calculation of the example similarity, according to the different starting point, people tend to focus more about the influence of local similarity to the whole similarity of some properties.
,μn=i=1mwi×simq,μi=1mwi (3) In formula: q--- New problems which represent the example or target example; u--- Source example in case database; qi, ui- The i attribute of the q ,u； m-- The number of the properties in problem description part; wi-- The weight of close-season similarity of the i attribute.
On the analysis of the physical properties of the workpiece materials, respectively take the material hardness, tensile strength, elongation, impact toughness, thermal conductivity of the weight as 0.3, 0.3, 0.2, and 0.2.

The stress on the weld is one of the key factors and should be given special attention.
Zhu Yaohong et al [7] experimentally studied the mechanical behavior of the longitudinal joint of the subway shield tunnel under different joint bolts; Zhao Qing [8] established different finite element models of the shield tunnel to study the mechanical properties of the shield tunnel segments and bolts.
Material properties.
Mechanical properties of the material.
(in Chinese) [8] Zhao Qing.Study on three dimensional numerical modeling method of shield tunnel and mechanical properties of lining [D].Sichuang: Southwest Jiaotong University,2017.

They revealed that inhaled fumes particles having distinct morphologies, surface properties, and chemical composition had a distinct biological effect on the working operator.
A tungsten carbide drill bit of 600 μm was considered as a tool electrode due to its high melting point (2850 ℃) and good mechanical properties i.e high toughness and hardness.
Whereas the concentration of fumes particles is affected by the spark energy produced in the machining zone.
Fig. 4 Variation of FMC with electrolyte concentration Fig. 5 Variation of FMC with the duty cycle Morphological analysis of fumes particles The morphology of fume particles is primarily used for analysing aerodynamic properties and surface area of particles.
The quantity of inhaled fumes particles significantly depends on two factors (i) aerodynamic properties and (ii) surface area of particles [13].

Many studies had shown that Sn-Ag-Cu solders (SAC) possessed superior mechanical properties such as high strength, good ductility and long fatigue life.
Dendrites growth was another factor affecting the reliability of solder joint in electronics packaging.
The another factor affecting on whisker formation was absolutely relative to the formation of IMC (intermetallic compound), Zn and Bi doping in SAC solder cannot eliminate IMC formation, which can cause the compressive stress on the solder alloys, so whisker growth was inevitably.
Electrochemical migration properties of SAC solder could be suppressed by Bi addition, which the contrary effect suitable to Zn addition.
In order to attain the excellent characteristics of SAC solder, these factors on reliability would be considered evenly.

This promotes the compaction of the material to practically nonporous state and enhances its mechanical properties.
Applied pressure higher than Laplace pressure promotes structure formation, and attainment of enhanced mechanical and functional properties of sintered materials for structural and tool applications.
Therefore, in this mode, sintering can enhance the material mechanical properties.
A machine is characterized by inertial properties expressed through mass and by elastic rigidity.
Dynamics of Sintering at a Preset Motion To obtain high-density parts with enhanced mechanical and functional properties, powder metallurgy employs hot forging using crank presses.

Introduction The stamping formability of cold rolled sheet (CRS) depends not only on its microstructure and mechanical properties, but it is also closely related to the surface conditions of CRS.
The mechanical properties and microstructure of test material are shown in Table 1 and figure 1, respectively.
The grain size is level 9.5, and the mechanical properties of them are similar.
Table. 1 Mechanical property of the three steel plates No.
Sheet forming properties of three kinds of texturing technologies.

Their practical use requires the following properties: avoiding short-circuits between neighboring wires, producing a minimum of toxic gases and dark smoke during pyrolysis, and keeping good mechanical properties.
KT Ea Aek − = (5) where A is the former factor and Ea is the apparent activation energy.
And because the crystal embryo of the Mg,Al-hydrotalcite produced instantaneously is less than 10 nm (See Fig.2(a)), the shape of the crystal embryo can be supposed to be spherical after we add the factor of shape rectify b.
And this is due to the reason that the less the Mg,Al-hydrotalcite grain, the less affecting of the shape rectify factor b based on the assumption that the grain is the round shape; (3) With prolonging the reaction time, the gap between the theory curve and the experimental curve is increased.
And the reason is as follows: 1) the concentration C0 of the reaction liquid is changed a lot after reacting a long time; but we suppose that A value, which is also decided by C0, is a constant when we draft the theory curve; 2) the longer the reaction time, the greater the Mg,Al-hydrotalcite grain size, the more affecting of the shape rectify factor b on the calculation of grain size.

Foams containing large cells suffer a reduction in mechanical properties; therefore, an optimal foam contains small, evenly sized, and well distributed bubbles in large numbers.
Foams containing large cells suffer a reduction in mechanical properties; therefore, an optimal foam contains small, evenly sized, and well distributed bubbles in large numbers [1].
Resin viscosity also has a strong affect the nucleation of rotationally moulded foams.
Fig. 5 demonstrates the behaviour of a range of polymers with varying melt flow properties.
It was though that the use of mould pressure to control densification could also remove the careful balancing act of polymer rheology properties needed to create foams in rotational moulding, meaning that higher zero shear viscosity materials with a high melt strength could be explored instead.

Influence of Multiple Firing on the Bending Strength of Zirconia/Porcelain Bilayered Dental Ceramics Rong-Jian Lu1,a, Ting-Ting Ma1, Yuan-Fu Yi2, Long-Quan Shao3, Jie-Mo Tian4, Kang-Lin Hou1, Ning Wen1 and Bin Deng1,b 1 Department of the Prosthodontics, The General Hospital of Chinese PLA, Beijing 100853,China 2 Department of the Stomatology, The General Hospital of Chinese People’s Armed Police Forces, Beijing 100039, China 3 Department of the Stomatology, The Nanfang Hospital, Guangzhou 510515, China 4 State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China a lrj200112@sina.com, b dengbin1971@yahoo.com.cn Keywords: Dental ceramics; Zirconia; Mechanical properties; Multiple firing Abstract.
Mechanical property of veneered zirconia was carried on single factor variance analysis with origin7.0 software, a = 0. 05.
Mechanical property of Zirconia/Vita VM9 ceramic composites showed in Table 1, the three-point bending strength of bilayered ceramic composites didn’t change significantly after 2 to 8 times firing, and strength difference among treatment groups was not statistically significant (p = 0.97567).
Material that still maintained good thermal stability after multiple firing, could make bilayer ceramic restoration better property.
This also reacted mechanics property between zirconia and veneer porcelain matched well.

(Problem 3) Even if the panel is made of alternate bonded composite and metal layers, only one panel is modelled in the numerical analysis (Fig. 17), with global thickness and mechanical properties calculated with the “rule of mixture”.
Skin and doubler have the material properties of Al 2024 T3 kin and doubler have the material properties of Al 2024 T3ct “IARCAS and Al 2017-NAS 1097.
The assembly component dimensions and rivet mechanical properties are reported in Table 2.
Assembly component dimensions and rivet mechanical properties.
The propagation analysis is based on the NASGRO3 formula (eqn. 12), where the fatigue material properties, are related to the Al 2024 T3 (all the analysed cracks will affect the only skin).