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The tensile mechanical properties were tested in WDW-100 microcomputer control electronic universal testing machine.
It is found from Fig.4 that the mechanical properties of the as-cast alloys can be improved greatly by A-EMS.
So the mechanical properties increase obviously by taking advantages of annular electromagnetic stirring casting process.
Comparison of mechanical properties of the test alloys with different casting processes.
It is indicated that the mechanical properties of the test alloy are also increased significantly with A-EMS.

In this paper, a finite element model predicting machining deformation was developed considering the above mentioned multi-factors coupling effects.
Computer Simulation Material Properties of the Part.
The workpiece material is high-strength wrought aluminum alloy 7050-T7451 and its mechanical and thermal properties are given in Table1.
First the CAD model is established in software package ABAQUS, then input material's mechanical and physical properties, original residual stress and boundary conditions.
a) Machining work b) Tre multi-frame components c) Deformation measurement Fig.10 Measuring deformation of true frame component Conclusions 1）A machining deformation prediction model by FEM was developed considering multi-factors coupling effects including original residual stresses, cutting loads and clamping force.

The mechanical properties of the unidirectional S-glass fiber/ epoxy prepreg were shown in Table 1.
Table 1 Mechanical properties of S-glass fiber/epoxy prepreg Fiber type E1 (GPa) E2 (GPa) G12 (GPa) 12ν (GPa) Volume fraction (%) Tensile strength (MPa) Tensile modulus (GPa) Tensile strain to failure (%) Density (g/cm 3 ) S-glass 85.5 85.5 35.6 0.20 45 4600 86 5.3 2.55 Fig. 1 Geometries of GLARE specimen and cross-section viewing It resulted from the weakness of S-glass fiber/epoxy layer under compression.
The delamination was greatly affected by the crack rather than by the number of cycles [4].
It was believed that the change of the b/a could affect a major parameter to determine the delamination shape factor (fS) and the delamination growth rate (dAD/da).
The effect of three different delamination shape factors (fS1, fS2, fS3) on the behavior of the dAD/da was considered in Fig. 8.

The paper deals with the theoretical analysis of physical, structural, and layout determinants affecting the design and restoration of historic buildings in terms of fire safety.
The real fire resistance of the load-bearing and fire-separating structures is primarily dependent on the mechanical load during fire and the fire load density affected by the operation.
The fire resistance of the structure in the fire department is dependent on the characteristic fire load density per area unit of ​​the floor (qf,d), combustion coefficient, fire hazard and fire protection factors.
The method of reduced properties works with the residual cross-section (obtained after reading the carbonized layer) taking into account the changed strength and stiffness material properties based on the modified coefficient.
  [6] Ďurica P.: Poruchy budov - diagnostika a sanácia - 1. vyd. - Žilina : Žilinská univerzita, 2012. - 244 s., [17,76 AH; 18,20 VH] : ISBN 978-80-554-0561-2 [7] Makovická -Osvaldová, L. - Gašpercová, S.: The evaluation of flammability properties regarding testing methods.

The influence of cutting conditions on friction and wear properties of PEEK, CF/PEEK and GF/PEEK composites using PCD tools Wenxia Wang School of Mechanical and Electronic Engineering, Shanghai Second Polytechnic University, Shanghai 201209, P.R.
The investigation illustrates that the addition of reinforcements to PEEK improve the tribological properties relation with the cutting conditions.
Introduction The use of newmaterials in technology development permitted that materials such as polymers find a new and quite relevant role in tribological applications (friction and wear) in which the service temperature, the environment with significant moisture, the high stiffness associated with the low density and chemical resistance appear as decisive factors in the selection of the material.
It has been reported that the reinforcing PEEK with some fibres has a beneficial effect on its strength and tribological properties[4].
Moreover, the successful performance of machining operation is significantly affected by the properties of work material[7,8].

With the minimum machining time requirement, the content of the article will determine the optimal forming machining parameters affecting the machining time.
With the minimum machining time requirement, the content of the article will determine the optimal forming machining parameters affecting the machining time.
Fig. 3 Curved taper model and test specimen parameters [6] Because the current forming angle cannot exceed the limit of α0 = 90°, the profile of the selected specimen has a speaker shape, the radius of curvature is R = 60 mm as shown in Figure 3. 2.4 Selecting experimental parameters With the combination of practical experience, mechanical properties of SUS 304 stainless steel and the technology system of a dedicated SPIF forming machine, the selection of limited forming parameters suitable for SUS 304 material is as follows: · Diameter of tool (X1): affects machining productivity
(1) = 23/4 = 1.682 where k is the number of factors studied, k = 3.
Through the function Y, it is possible to graph each pair of factors affecting the machining time (Figure 4 ¸ 6), the graphs are drawn when the value of the remaining factor is kept at the base level.

Introduction Triple junctions (TJs) are now becoming recognized as one of the most important and essential elements affecting texture evolution and mechanical behavior.
To a reduced extent, both grain boundaries [7] and precipitates [8] can also serve as nucleation sites because of their suitable geometric, physical and crystallographic properties.
The grain boundary character distribution is an important feature of the texture and affects many of the material properties.
In this regard, variant selection was somewhat stronger on planes with high Schmid factors, in the order primary, secondary, and so on, irrespective of the strain.
The observed tendency in Fig. 5 for the twinning plane fraction to be higher on planes with higher Schmid factors may be associated instead with the ease of folding and of the formation of triple junction affected zones (TJAZs).

The engineering ceramics has some properties such as high brittleness, low fracture toughness, elastic limit very close to strength.
The grinding speed affects less the changed range of surface roughness
While the feed speed is higher, it affects the surface roughness severely.
But the lower feed speed affects less
(2) According to the analysis, determine the precedence order of various factors of the rotary ultrasonic grinding engineering ceramic ZrO2 as follows: abrasive particle size, wheel depth of cut, feed speed, grinding wheel speed.

In this paper, the stiffness mechanical property of natural fiber reinforced thermoplastic composites is analyzed using composite micromechanical model.
Research Methodology In general, there are various micromechanical models developed to predict the mechanical properties of single fiber/matrix polymer composites system.
Table 2 shows the materials properties of the kenaf bast fiber and thermoplastic matrices.
The Halpin-Tsai equation was applied to analyse the elastic properties for all fiber loading conditions.
These results also highlight a great anisotropy of vegetal fibres between transverse and longitudinal properties [13].

The model employs a coupled thermal–electrical–mechanical analysis and accounts for temperature-dependent thermophysical properties of materials, contact resistance and the Peltier effect.
The RMW is a transient thermal process associated with both material nonlinearity from temperature dependent physical properties of workpieces and the geometrical nonlinearity from contacts at the electrode contact surface and the faying surface.
However, it is unpractical to consider all factors in the modeling.
Material Properties Data.
The simulation results are verified by comparing the calculation result and the heat-affected zone of joint cross section through metallographic observation, as shown in Fig. 4.