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Numerical Control Machines Performance Test Platform Song Juan, LI Ming Henan Mechanical and Electrical Engineering College, Henan Xinxiang 453002 Keywords: Numerical Control Machine, Performance Test Platform, Test Research Abstract.
The purpose of the research is to provide test equipment work show high-grade numerical control machine dynamic performance, another purpose of study is to provide the critical test technology, and reveals the dynamic performance of faults and development, the deterioration of the accuracy of the factors that lead.
Performance numerical control machine tools work out these signal acquisition accuracy directly affect the success of the signal of the monitoring system.
Fig. 1 Schematic Diagram of the Construction of Dynamic Performance Monitoring Platform for Typical Functional Parts of Numerical Control Machine Purpose dynamic performance test of the numerical control machine processing is to establish a flexible, open, and reconfigurable database and knowledge base fault analysis of influence factors nc machine tools machining precision and confirm fault diagnosis and effective warning methods.
Application based on granularity binary matrix calculation principle and property value reduction, evaluation and attribute rules rules scope and confidence, and then establishes knowledge base of rule base and fault diagnosis and prediction.

Of course, cost factor should always be considered.
The Design Method The current structural design theory of civil engineering is based on the traditional materials of elastic properties and plastic properties.
Based on material micro mechanical design theory and technological reinforced cement mortar, thus greatly improved its ductility, and even called as concrete material of metal deformation.
So in compression parts(such as arch or dome), to instead steel with high-strength concrete, it’s not only save the costs, but also play their excellent mechanical properties.
Cement and concrete products. 1986 (6) (In Chinese) [3] Chunjing Li ,Fengyu Liu: Factors affecting the strength of high strength concrete specimen with member [J].

Results and Discussion Mechanical Model and Deformed Meshes.
In this study, 3D four-node tetrahedral isoparameteric elements were used to carry out the discretization of a mechanical model.
(a) m=0.1 (b) m=0.2 (c) m=0.3 Fig. 2 Distribution of temperature of the deformed blade under various friction factors when height reduction is 8.0mm A A B B (a) m=0.1 (b) m=0.2 (c) m=0.3 Fig. 3 Distribution of temperature of the section A-A under various friction factors (a) m=0.1 (b) m=0.2 (c) m=0.3 Fig. 4 Distribution of temperature of the section B-B under various friction factors From the above figures, it can be seen that the distribution gradient of temperature increases, and the distribution of temperature becomes more and more uneven with increasing of friction factor.
But the temperature value of lower temperature zone located in the zone contacting dies has hardly been affected by friction.
From this figure, we can see that the change trend of load-stroke curves is similar under different friction factors, but the bigger is the friction factors, the bigger is the forging load, especially at the final forging stage.

They are used to obtain appropriate properties of adaptive structures.
The study [8] also concluded that the cantilever beam with such local treatment exhibits greater sensitive than the full treatment with regards to the natural frequencies and loss factors.
In following considerations it is assumed that homogenous magnetic field of strength H will be affecting on the chosen part of the beam.
Three-layered beam with MR fluid and magnetic field affecting on the part of the beam are schematically presented in Fig. 2.
Rao: Mechanical Vibrations (2011) [17] J.

Thermal fatigue properties of solder joints encapsulated with underfill were studied conducting thermal shock tests.
During curing process, lower temperatures and longer times, thus allowing for full curing of the underfill will lead to lower thermal stress and better physical and mechanical properties.
Fig.1 The thermal properties of underfills: (a) DSC results and (b) TMA results Figure 2 shows the change of electrical resistance of flip chip package under thermal shock according to different underfills.
Voids are defined as cavities formed in the solder joint and may degrade the mechanical robustness of the board level interconnection and consequently affect the reliability and the conducting performance of solder joint.
The location and the size of voids in the solder joints are perhaps the key factors on the performance and the reliability of solder joints.

Several factors, such as low cost, low density, biodegradability, availability, absence of associated health hazards, and they are relatively non-abrasive.
Temperature, microorganisms, radiation, moisture, and other environmental factors all affect rate of disintegration and degradation.
This is because RPVC does not have the same biodegradable properties as PLA.
Valadez-González, Mechanical properties of continuous natural fibre-reinforced polymer composites, Compos Part A Appl Sci Manuf 35 (2004) 339–345. https://doi.org/10.1016/j.compositesa.2003.09.012
Fan, Date palm fibre geometry and its effect on the physical and mechanical properties of recycled polyvinyl chloride composite, Ind Crops Prod 174 (2021) 114172. https://doi.org/10.1016/j.indcrop.2021.114172

Machining Induced Defects and the Influence Factors When Diamond Turning of SiCp/Al Composites Y.F.
Introduction Metal matrix composites (MMCs) have many outstanding properties such as high strength, low density, high thermal conductivity and low thermal expansion, which make them find their increasing application in the occasion which precision and ultra-precision machining are needed.
To the best of the authors' knowledge, no research has yet comprehensively demonstrated the type of the surface/subsurface defects and the factors that affect them when ultra-precision machining SiC/Al composites.
Cutting parameters affect the machined surface through the removing mechanism of SiC reinforcement and amplitude of relative tool-workpiece vibration.
Wang: China Mechanical Engineering, Vol.14 (9) (2003), pp.747 (in Chinese)

University of Sharjah, (UOS), UAE 3Department of Mechanical and Nuclear Engineering, University of Sharjah, (UOS), UAE aU15100768@sharjah.ac.ae, baaldawoud@sharjah.ac.ae, csjunaidi@sharjah.ac.ae Keywords: Termite mound; thermal properties; biomimicry; building envelope; humidity.
The influence of the termite model on the thermal properties such as the Decrement Factor (DF), Temperature Difference Ratio (TDR), and Time lag (Tlg) was investigated.
These parameters include: · Outdoor environmental parameters (outdoor temperature, wind speed, and sky temperature) · Thermal properties of the building envelope
These factors include the Temperature Difference Ratio (TDR), the decrement factor (DF), and the time lag.
“Numerical Computation of Time Lags and Decrement Factors for Different Building Materials,” Building and Environment, V41(I.5), pp. 615–620

Benguediab et al. [43] have analyzed the Chirality and scale effects on mechanical buckling properties of zigzag double-walled carbon nanotubes.
Semmah, Chirality and scale effects on mechanical buckling properties of zigzag double-walled carbon nanotubes, Composites Part B. 57 (2014) 21-24
Semmah, “Chirality and scale rffects on mechanical buckling properties of zigzag double-walled carbon nanotubes”, Composites Part B, 57, 21-24, (2014)
Zhong, An energy-equivalent model on studying the mechanical properties of single-walled carbon nanotubes, Thin-Walled Struct. 44 (2006) 667-676
Semmah, “Chirality and scale rffects on mechanical buckling properties of zigzag double-walled carbon nanotubes”, Composites Part B, 57, 21-24, (2014)

Residual stress is an important factor in quality of the welding joints.
Residual stresses do not only affect the corrosion, cracking and fatigue strength in the mechanical properties of the welding joint, but also greatly affect physical mechanical characteristics of material, Therefore, the quantitative residual stress state obtained is very important for the welding structure designers, manufacturers and users.
Experimental test is authenticity, but can’t avoid the effects of human factors, environmental factors on the test results, the results of different measurements are different even using the same model.
That is to say, the correlation between the material properties and temperature should be taken into account.
The physical parameters at different temperatures are shown in Table 2[5] [6] Table 1 Chemical composition of A6N01S-T5 (wt%) Si Fe Cu Mn Cr Zn Ti V Mg 0.60 0.13 0.009 0.11 0.0021 0.03 0.034 0.010 0.64 Table 2 Material properties of A6N01-T5 Temperature（℃） 25 100 200 400 600 611 660 Thermal conductivity W/(m·K) 180.48 185.33 189.53 194.47 197.45 197.37 87.16 Heat capacity J/(kg·K) 0.9 0.94 0.99 1.07 1.21 2.21 1.17 Density（g/cm3） 2.7 2.68 2.66 2.62 2.57 2.57 2.39 Modulus（GPa） 67.54 64.65 60.79 25.4 7 5 1 Yield Strength（MPa） 210 185 110 30 12 5 5 Poisson's ratio 0.339 0.342 0.347 0.358 0.373 0.374 0.498 Heat source parameters.