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The orthogonal test method is used to study the influence of three factors on the workability of concrete.
The factors are the proportion of iron mine tailing in the mixed sand, sand percent and the paste and aggregate ratio.
The results show that compared with sand percent and the paste and aggregate ratio, the proportion of mine tailing in the mixed sand is the main factor which affects the concrete workability.
The performances of concrete prepared by iron tailing mine sand are tested according to the national standards about concrete workability and mechanical property.
Water cement ratio (or water binder ratio) is the main factor that affects the concrete strength.

Introduction The 3D porous biological scaffold for cells is the one of the key factors in bone tissue engineering.
In different parts of the body, the mechanical properties of the bone are different.
The mechanical properties are anisotropic to meet the physiological functional requirements.
Thus, in clinical process, both sides should be considered that it would enhance scaffold maximizing porosity under a certain mechanical properties.
The work was the research and analysis for biological mechanical properties of overall structure with femur and scaffold through three-dimensional finite element method.

On the basis of thermo-mechanical coupled FEM model which characterized the composites liquid-solid extrusion process, the constant-velocity and non-constant-velocity extrusion process were simulated by 3D thermo-mechanical FEM.
Thermo-mechanical FE Model Set Up FEM Formulation.
The physical model includes the thermo-physical property, the mechanical behavior, the plastic work, friction and frictional heat generation.
The thermo-physical properties of composite were calculated from the thermo-physical property of Al2O3 and LY12 (presented in Table 1) according to the mixing law.
It can be concluded that it is the mode of velocity rather than the average velocity which affect the forming temperature significantly.

As in any other technology, when manufacturing by means of 3D printers, the accuracy of the final product is influenced by many factors.
This entails a certain restriction, since when using these materials, the walls and ribs cannot be thinner than approximately 1.2 mm in order to have the required mechanical properties. [2] The basic properties of the Digital ABS material are listed in Table 1.
The basic properties of the Vero White Plus material given by the manufacturer are listed in the Table 2.
This method consists of establishing fundamental factors that are changed throughout the experiment.
In addition, the output consists on only of the found optimum, a visible mutual interaction between the individual factors as well.

Viscosity = reading obtained x (factor for the spindle speed comb
Biodiesel production from waste cooking oil: 1.Process design and technological assessment, Department of Chemical Engineering, University of Ottawa, Ottawa, Ont., Canada, Bioresource Technology 89: 1 [5] Mccormick R.L., Ratcliff, M , Moens, L and Lawrence, R., (2007): “Several factors affecting the stabilitry of Biodiesel in Standard Accelerated Tests”, Fuel Processing Technology, 88(7): 651 – 657 [6] Knothe, G., Bagby, M.O., and Ryan III, T.W.,(1998): “Precombustion of Fatty Acids and Esters of Biodiesel.
,Justiz-Smith N.(2012)Physico-chemical properties of Blighia sapida (ackee)oil extract and its potential application as emulsion base.
[20] Omosuli S.V.(2014), Physicochemical Properties and Fatty Acid Composition of Oil Extracted from Akee Apple (Blighia sapida) Seeds.
Chemical composition and physiochemical properties of cashew nut.

This paper presents the main results of the research carried out to analyse the mechanical properties of concrete incorporating with eggshells waste.
The chemical properties of eggshells ash is shown in Table 1.
Table 1 Chemical properties of eggshells ash.
In order to ensure the water cement ratio is not affected, the sand must be dried out first.
One of the most important factors for producing workable concrete is a good gradation of aggregates.

The tool selection is a complex and optimization process, it is affected by a number of factors.
Therefore, giving full play to the excellent properties of cutting tool and achieve desired cutting effect, we must choice reasonable tool according to the specific object.
In this experiment, we choose selection Cr12MoV steel as the workpiece material, which chemical compositions is seen in Table 1 and its mechanical and physical properties is shown in Table 2.
The size of the vibration directly affect the surface contact status between tool flank and workpiece which determines the precision surface of workpiece.
Conclusions Making measurement and analysis to cutting force, cutting force, cutting temperature, cutting vibration, machined quality and tool wear of high hardness hardened steel Cr12MoV (HRC65), we can get the following conclusions: Under this experimental condition, taking the factors of cutting force, cutting temperature, cutting vibration, machined quality and tool wear into consider, the results of the study show that: TiAlSiN is the most suitable for Cr12MoV (HRC65).

In order to achieve the optimum mechanical properties in AA2024, it is usually necessary to solution heat treat and age the wrought product.
Variation of properties with the temperature compensated strain rate parameter.
One of the most limiting factors of the extended application of high strength aluminium alloys is their relatively low fracture toughness.
With FEM simulation, the distribution of the volume fraction recrystallisation factors can be predicted and extracted more easily.
In Interfacial Engineering for Optimal Properties Mat.

Optimization Design of Heterogeneous Injection Mold Cooling System Li Ren1, a and Wenxiao Zhang1,b 1 School of Mechanical Engineering, Dalian Ocean University, P.R.
For the cooling system of plastic injection mold affects significantly the productivity and quality of the finial products, the cooling system design is of great importance.
In this paper, considering the location, size, number of cooling channels and mold material properties, the optimization design of heterogeneous injection mold cooling system is discussed to achieve simultaneously fast and uniform cooling.
Many aspects of production efficiency and part quality are significantly affected by the mold cooling process.
International Journal of Mechanical Sciences, 2006, 48: 430-439

In recent years, there has been many results for the study of structural properties of granular materials.
Because of the complex, random features, many mechanical properties can not be demonstrated and explained.
The main factors which affect the movement of particles includes: 1.the shear resistance which particles need to overcome(friction force and bite force between particles) [4] [5];2.the exciting force.
Fig. 2 The distribution density of the movement of the particles changes with depth The movement of the particles which is caused by the vibrational energy has been affected by the shear resistance.
It points out: when the friction of the shear resistance is equal to zero, it affects the shallowest depth and the speed reduces fastest; on the contrary, the friction of the shear resistance is greater, it affects the deeper depth and the speed reduces slower.