Search results

Therein, the mechanical properties of the steel sheet are neatly characterized through a group of uniaxial tensile tests.
The degree of die deformation is influenced by the material properties and structural characteristics of the die, with rigidity playing a particularly critical role [5].
Mechanical properties of the 3-mm thick HR420LA high-strength steel sheet along three different sheet directions.
Though the effect from both factors are very marginal, incorporation of die deformation appears to have a greater impact on the simulation results than variation of the yield model.
Expectedly, tiny die deformation barely affects the degree of part springback.

Based on the above discussion, research on grinding PCD tools at present mostly focused on grinding mechanism and single factor's optimization under the definite condition, lack of researching and optimizing integrated effect of certain factors on grinding process.
Experimental Method This study chose PCD tools with E Six CTB002 brand material whose mechanical and physical property is shown in Table 1.
This experiment chose grinding speed (rotational speed of grinding wheel), grain size of grinding wheel and grinding pressure that affect grinding process at the most, and was carried out in orthogonal experimental method, L9(3 4 ) orthogonal table with 3 factors and 3 levels.
The experimental factors and levels are shown in Table 2.
Therefore, to grinding efficiency, the best grinding efficiency is rotational speed 3500r/min, grain Table 2 Value of experimental factors and levels Factor 1 Factor 2 Factor 3 Factor level Rotational speed [r/min] Grain size [µm] Grinding pressure [Pa] Level 1 1500 09 5.5 Level 2 2500 15 4.0 Level 3 3500 22 2.5 size 22µm (or 9µm), grinding pressure 2.5Pa.

A nonlinear three-element model is used to obtain its mechanical constitution.
Our model cell is now first built to simulate this, and then some other mechanical properties can be developed to form a biomechanical model cell. 2.
The micropipette aspiration has developed a powerful technique to investigate the mechanical and rheologic properties of suspended and adherent cells [3, 4].
As we all know, Ca 2+ is the main factor which affects the pulsation of the myocardial cell.
[7] Olivier T, Olivier C, Changes in the mechanical properties of fibroblasts during spreading: a micromanipulation study, Eur Biophys J (1999) 28: 222-23 [8] Schmid Schonbein, G.W, Passive mechanical properties of human leukocytes, Biophys.J.36, 243-256, 1981 [9] M.

Material and grain size of stucco on the secondary layer greatly affects the properties of the molds.
Nylon addition is not affect strength of silica sand ceramic mold but significant increase the edge strength of the mold.
Maksimovic, Microstructure and mechanical properties of precision cast TiAl turbocharger, J.
Nguyen, Identification of critical factors affecting shrinkage porosity in permanent mold casting using numerical simulations based on design of experiments, J.
Kuskonmaz, Properties of ceramic casting molds produced with two different binders, Ceram.

Indeed, the residual stress distribution affects fatigue life, corrosion resistance and other functional aspects of the workpiece.
However, modeling these types of operations by FEM has some limitations principally due to the high computational time, the lack in the material properties, as flow stress functions at very high strain rate and temperature, and in the definition of heat transfer and thermal exchange coefficients between workpiece and tool.
In the first phase the IL solver is utilized for reaching the mechanical steady state.
All the other thermal (thermal expansion, thermal conductivity, specific heat, …) and mechanical (density, Young’s modulus, Poisson ratio, …) material properties were set according to Deform 3D material database.
The friction factor m was set equal to 0.82 representing dry conditions according to Ceretti et al. [20].

However, the release of the bound chloride is influenced by many factors which do harm to the durability such as chemical erosion and stray current, as the bounds usually are not firm, thus leading to more free chloride ions dissolved in the pore solution and participating in the corrosion process [1-2].
Chloride binding ability is affected by many factors like content of chloride ions, water-to-binder ratio and curing conditions.
It is well known that the critical factor affecting the performance and durability of a concrete structure is the pore size distribution.
Due to this variation in pore size, there is much variation in micro-structural properties, mechanical properties and corrosion behavior studies.
Newman, Factors influencing chloride-binding in concrete, Cement and Concrete Research. 20 (1990) 291-300

Ti-6Al-4V is unique in that it combines attractive properties with inherent workability and good weldability.
Fig.2 Finite element model Mechanical and thermal physical properties of TC4 at different temperatures can greatly affect the simulation precision, therefore, those properties should be cared about.
Thermal physical properties of TC4 show a rising tendency with higher temperature.
Fig.3 Temperature dependence of mechanical properties of TC4 Fig.4 Temperature dependence of thermal physical properties of TC4 In the solution of finite element matrix, the boundary condition included welding condition, fixture condition, and thermal condition.
The compressive residual stress is the critical influencing factor to cause wave-like deformation.

Comparing the consequences, the sliding planes and safety factors agreed well with the result of limit equilibrium method.
The internal stress and physical and chemical properties has changed greatly.
Table 1 Rock mechanical parameters E(mpa) v (Kpa) 2800 0.2 10 30 Fig.2 The Finite Element Computing Model Fig.3 shows the sliding plane when the water depth is 30m.
And the safety factors (showed in Table 2) coincide well.
It is showed in Table 3, that the safety factors of the two conditions are very close.

In addition, the crack length affects the plastic rotational factor, and this is disadvantageous to the evaluation of shallow surface cracks in linepipes [4,5].
Secondly, the ratio of J-conversion CTOD to CMOD-based CTOD was analytically evaluated for several mechanical properties.
Twenty-three P-Vg curves of four steels, A517 [10], A533-B [11], YR70 and YR90 [12], were referred to, and their mechanical properties and CTOD test conditions are shown in Table 1, where Y/T is the yield-to-tensile ratio and S is the span of SE(B) specimens.
Table 1 Steel mechanical properties and CTOD test conditions.
The Electric Power Research Institute (EPRI) scheme [13] was used for the calculation of Jpl and Vpl, where εys is the yield strain and P0 is the limit load of SE(B) specimens. h1 and h2 are factors that relate to a/W, N, specimen configuration and constraint conditions, and are listed in the EPRI report[13]. αpl is the material factor in the plastic term of the Ramberg-Osgood relation, and was given by 0.002E/σys in this study. 1N 0 1ysysplpl P P hb J +       = σεα , N 0 2ysplpl P P ha V       = εα , SbB4451 P ys 2 0 σ

Results also show that convection efficiency strongly depends on the grinding wheel speed, grinding arc length and fluid properties.
A new analytical model of CHTC is proposed to include fluid properties: dynamic viscosity, conductivity, density and specific heat capacity.
This does not affect the derivation of the basic equation.
Convection factors based on temperature measurements.
The values of convection coefficient strongly depend on the grinding wheel speed, grinding arc length and fluid properties.