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The use of coupled experimental researches (including NDT – non-destructive testing and local mechanical properties of castings) and simulation tests (Procast, ANSYS) have shown how the properties gradient influences on the safety factor distribution in the casting subjected by chosen load.
These discontinuities are related with local cooling rate and temperature gradient and affect the mechanical properties variation of the casting wall section (casting thickness) [1,2].
It is usually applied in stress calculation to take into account homogenous mechanical properties in all the casting volume without real zones with local mechanical properties.
Fig. 1 Algorithm of experimental-simulation tests coupling the structure and properties gradient with stresses distribution and local safety factors.
As the simulation tests show (ANSYS), the way of discontinuities assumption in the material of the casting significantly affects the calculated real safety factors.

The mechanical properties of lost foam pattern and its mechanical property model were studied, which provided theoretical support for the research of numerical control processing and safe casting of lost foam pattern.
In lost foam casting, under normal circumstances, there are many factors affecting the dimensional accuracy of casting, such as the structure, shape and size of the lost foam casting, the influence of the quality of the foam plastic, the influence of the coating, the influence of the casting process, the casting process and so on.
Menges and Knipschild studied the mechanical properties of rigid polyurethane foam.
There are still some works about the influence of cell structure on the mechanical properties of foam plastics.
Compared with low density foam plastics, the mechanical properties of high density foam plastics are seldom studied.

Influence of Pulsed Gas Feeding on Surface Defects and Mechanical Properties of Ti/TiN Multilayered Films deposited by Ion Beam Assisted Magnetron Sputtering FU Zhiqiang1, a, REN Yi1, WANG Chengbiao1, YUE Wen1, and LIN Songsheng2 1 School of Engineering and Technology, China University of Geosciences, Beijing 100083, China 2 Guangzhou Research Institute of Non-ferrous Metals, Guangzhou 510651, China a fuzq@cugb.edu.cn Keywords: Ti/TiN multilayered films; ion beam assisted magnetron spputtering; pulsed gas feeding; surface defect; mechanical properties.
It was found that the key factors affecting surface defects of monolayer TiN films are sputtering power and N2 flow rate while ion current is the most significant factor affecting the hardness of monolayer TiN films.
Table 4 Effect of various factors on LC of TiN films Factors SⅠ SⅡ SⅢ R Optimal A 2.83 9.07 8.33 6.24 7-9 kW B 9.63 5.43 5.17 4.46 20 sccm C 8.00 5.97 6.27 2.03 4 A D 8.27 6.00 5.97 2.30 150 ℃ Table 3 Effect of various factors on AD of TiN films Factors SⅠ SⅡ SⅢ R Optimal A 3.09 3.45 2.23 1.22 9 kW B 2.32 2.63 3.82 1.50 20 sccm C 2.77 2.81 3.19 0.42 4 A D 2.48 2.61 3.68 1.20 150 ℃ The effect of various factors on LC of TiN films is shown in Table 4.
Table 5 Effect of various factors on HV of TiN films Factors SⅠ SⅡ SⅢ R Optimal A 1783 2218 2272 489 9 kW B 1999 2026 2247 221 50 sccm C 2460 2109 1704 756 4 A D 2322 2117 1834 488 150 ℃ The effect of various factors on HV of TiN films is shown in Table 5.
Conclusions The key factors affecting the monolayer TiN films deposited by ion beam assisted magnetron sputtering are sputtering power and N2 flow rate while ion current is the most significant factor for the hardness of the monolayer TiN films.

A two-factor design was then applied to determine the two factors that influenced the PA6 fatigue displacement the most, with analysis of variance being used to determine how the factors affected the fatigue property.
Analysis of variance (ANOVA) was used to determine how the factors affected the fatigue.
Zoalfakarb, Mechanical properties of glass fiber reinforced polyester composites, Int.
Özdemir, Experimental investigation of the effect of glass fibres on the mechanical properties of polypropylene (PP) and polyamide 6 (PA6) plastics, Mater.
Quaiyyum, Mechanical properties of polypropylene composites: A review, J.

Another issue of concern in galvanizing high strength steels is the zinc bath temperature, which might affect the mechanical properties of high strength steels.
Nevertheless, these mechanical properties are recovered after galvanizing [3].
This is why the tensile test specimens were pickled for two hours in 10 % HCl acid containing inhibitor to investigate if pickling process can affect the mechanical properties of the steel.
Gutierrez-Solana, Environmental factors in failure during structural steel hot-dip galvanizing, Eng.
Langill, Mechanical Properties of Hot-Dip Galvanized Steel, Structures Congress 2009. 1-6

Cooling is very important in the process of hot stamping process of a link, directly affect the mechanical properties and service life of the forming parts.
This paper deeply analyzes the hot stamping process and heat transfer theory, summarizes the main factors affecting mold cooling system performance.
A rapid and uniform cooling is an important index of measuring mold cooling system is reasonable, the ideal cooling system can not only improve the efficiency of production, is also the key to improve the mechanical properties and dimension precision.
This study was based on the basic theory of heat transfer, analyses the factors that affect the cooling effect.
The analysis found: the velocity of flow, pipe spacing, the pipe diameter is the main factor affecting the mold cooling effect, this paper uses the FLUENT fluid analysis software of cooling process of U shaped parts of analysis, simulation of temperature field change state.

It is also found that the mechanical properties can affect cell differentiation and tissue development and regeneration.
The density of cell encapsulated in scaffolds is a critical factor that affects the mechanical properties of hydrogel scaffolds.
This model will provide a basis for the design of the mechanical properties of scaffolds.
At a high cell density, the mechanical property of cells causes the nonlinearity of scaffold mechanical properties.
Different cell densities may lead to different mechanical properties of scaffolds.

The factors influencing the surface quality of machining and improving measures Chaoqun Leng xianjing Luo Nanchang University of Technology, Nanchang ,Jiangxi 330044, China Hunan Polytechnic Vocational College , Xiangtan,Hunan 411104 ,China Key words: Mechanical processing; The surface quality.
After understanding the factors that affect the surface roughness, we must reduce the roughness of machined surface, according to need to improve the machining surface quality.
References: [1]Chen Yanhua. the influence factors of machining surface quality [J].
Mechanical processing surface quality affect the performance of machine use [J].
[3] Yu Zhijuan, mechanical processing surface quality and influence factors analysis [J].

Mechanical Properties Research on Concrete Block Doped Nano-TiO2 under the Conditions of Common Conservation Zhiyong Deng Zhejiang Business Technology Institute, Ningbo 315012, China ddzzyy2005@sohu.com Keywords: concrete block; nano-TiO2; mechanical properties.
By compressive test of concrete block doped nano-TiO2 under the conditions of common conservation, this paper respectively studies the regulation of compressive properties of the concrete block affected by the factors such as concrete strength and nano-TiO2 dioxide.
The properties of NM- titanium dioxide are listed in Table 2.
Mechanical Property of Concrete Mixed NM-TiO2 Concrete with NM-TiO2 is a new type of composite building materials, its mechanical properties has different characters because of the complex material.
Therefore, this article will study the concrete mixed NM-TiO2 mechanical property experimental research, and make theoretical analyses for this research.

The pore size, strut thickness, and internal structure of the bone implant are vital factors affecting mechanical strength and Young's modulus.
The deviations can be caused by many factors, such as the inaccurate dimension of the actual printed sample and imperfect pore shape, which affect the mass, volume, and ultimately the actual sample's density.
Such deviations can cause a substantial reduction in the mechanical properties of the actual printed sample and affect the osseointegration of the implant [12].
The directional microstructures may cause anisotropic mechanical properties.
The difference in the pore size and overall size may also affect the actual mechanical properties.