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We utilized a smaller sample (340 000 atoms) with edge crack (001) to examine the effect of a6 parameter on the ductile-brittle response at the crack front and mechanical properties.
It was found that h magnitude does not affect microscopic processes at the crack front significantly.
We concluded that this factor is insignificant for the ductile vs. brittle response from the crack front.
Since the relative dimensions l0/W, L/W, B/W in atomistic and experimental samples are almost the same, the boundary corrections for K-factor and T-stress from linear fracture mechanics are expected to be the same in our MD simulations and experiments [1].

Introduction In the field of biomedical materials, titanium and its alloys, in terms of superior biocompatibility and mechanical properties, are widely used for dental and orthopedic implants, but they are not good enough in clinical use.
The factors which may affect the result are temperature and the heating time.

Wu 1 1 College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China a pangcunchen@126.com, bxufeng@nuaa.edu.cn Keywords: Microwave printed circuit board; Milling; Optimization; Genetic algorithm; DBMS Abstract.
If the workpiece, cutter and parameters of a machine tool are chosen, MRR is mainly affected by cutting speed vc, feed per tooth fz, axial depth of cut ap and radial depth of cut ae [2].
Interior penalty function method is used to transform the constrained optimization problem into the unconstrained one because GA is used to solve the latter. 0)(,0)( =≤ xfxg ii (8) )()(,0)( xgxfxg i i i =≥ (9) Let )(xΦ be optimization function: ∑⋅+−=Φ 6 1 )()()( xfrxQx ij (10) where j is the genetic algebra, r1, r2, …, and rj are a series of penalty factors, which are from small to large, that is r1So it is required that all users can query properties of machine tool, cutter, workpiece material and milling parameters.

Research on Cathode Chronopotentiograms and Interelectrode Resistance during Vacuum Boiling Electroforming Juntao Wang1, a, Pingmei Ming2, b 1,2School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454003, China a990373977@qq.com, bpmming@hotmail.com Keywords: Vacuum boiling electroforming, Chronopotentiometry, Interelectrode resistance, Mass transfer Abstract.
The change of interelectrode resistance may be mainly due to two factors.
On the one hand, the properties of gas-liquid two-phase medium including conductivity, volume fraction and topography of dispersed phase affect the medium’s resistance and its distribution[13].

The material properties of acoustic cavity between the body structure and seats were set to the air with density of 1.29 kg/m3 and the sound propagation velocity of 340 m/s.
The material properties of front and rear seats were set to foam with density of 19-11i kg/m3, sound propagation velocity of 66+24i m/s [15].
Inspired by a certain excitation, some of resonance frequencies may be aroused to generate a strong resonance, which not only made the driver uncomfortable but also affected driving safety.
Based on the original structure model, optimal model was established, and three factors for the optimization were determined as objective function, constraint condition and design variables.
[12] GB/T 7031-2005: Mechanical vibration-Road surface profiles-Reporting of measured data.

For the radiopacifier application, low amount BaSO4 is usually used to avoid the agglomeration that can reduce the mechanical properties of bone cement.
Scanning Electron Microscopy (SEM) was observed using a Zeiss Evo MA-10 with a magnification factor of 50 and an accelerating voltage of 3 kV.
As the polymer filler, the higher amount of BaSO4 can increase the mechanical performance of the Bone Cement Composite.
However, overpopulated BaSO4 can affect the polymer matrix formation.
Buang, A Review of the Properties and Applications of Poly (Methyl Methacrylate) (PMMA), Polym.

The implications of bone implant materials on the host body are important factors that determines the success or failure of the developed materials.
Therefore, a thorough understanding of the correlation between the material properties and biological effects is necessary.
White Portland cement (WPC) is the preferred choice to improve the strength of HAp, since its mechanical properties and setting mechanism are similar to those of gray cement.
While the mechanical properties of bulk HAp have been reported inappropriate in load bearing applications such as orthopedics, HAp/WPC composites are an alternative choice to achieve a favorable combination of properties, and incorporating the best characteristics of each material.
The addition of HAp to WPC affected the hydration of WPC resulting in a deceased compressive strength.

In addition, the standard deviations of multi-segments stitching errors are between 0.2 μm and 0.4 μm as the four factors are set to the proper values.
Introduction Large scale aspheric surfaces are increasingly applied in space optics and military fields because they have great optical properties in improving the image quality and reducing the number of optical elements and associated size and weight [1,2].
As shown in Eq. (4), Dz3 are affected by the translation amounts, the rotation angles and the corresponding motion errors. 2.
Fig. 3, Fig. 4, Fig. 5 and 6 shows the variation trend for standard deviations of Dz3 when the four factors increase respectively.
When the two factors increase respectively, the variation trend of standard deviations of Dz3 are depicted in Fig. 10 and 11.

Introduction The metal cutting processing is a complex plastic deformation processing in the effect of thermal and mechanical coupling [1].
Factors having the greatest effect on the cutting surface developing are the deformation and stress state in the deformation zone III.
Therefore the deformation zone before the blade directly affected by cutting edge is more prone to slipping apart.
China Mechanical Engineering. 18(2)(2007):220-224
Solidification behavior, microstructure and mechanical properties of high Fe-containing Al–Si–V alloys [J].

Plain concrete is chosen as the target material, using LS-DYNA plastic kinematic hardening model to simulate the projectile material 45steel. 45 steel is a kind of mild carbon high quality steel, which has the good comprehensive mechanical properties, and has been more widely used in conventional weapon development experiments.
Chen Gang [4] and others studied the effects of stress state, strain rate and temperature on the failure strain of 45 steel; Lou Jianfeng [5] and others studied the effects of long rod penetrator material parameters on the penetration performance, and that the failure strain is the main parameter affecting penetration depth.
To accurately simulate the transient response of structures, the description of material’s mechanical behavior is a crucial foundation.
Material failure is a kind of complex physical mechanical phenomenon.
Numerical simulation can fully reflect penetration details of the process, as well as changing relationships in projectile, target and various physical quantities, and you can visually identify how those factors have influenced structural deformation and failure of projectile in penetration.