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The aim of this study is to clarify main factors affecting the non-linear stiffness of unsaturated soil at small strain range for a precise prediction of various ground deformations.
As the important factors for mechanical behaviour of unsaturated soils under small strain range, the effects of suction and mean net stress, which introduce the decrease of void ratio and degree of saturation, were discussed in the study.
The focus of the study is put only on the main factors affecting small strain stiffness, such as void ratio, mean net stress and degree of saturation together with the suction effect.
Other physical properties of it are as follows: =0.990,=0.597, =0.18mm, =1.55 and =1.05.
Their properties were measured by the Japanese standard.

Clay as pottery’s raw material is a major factor that is affecting the quality and reliability of any pottery product.
The clay source areas need to be well determined their geochemical properties in order to control the end properties of clay product.
The new location must be studied and compared their clay properties with establish location in order to understand the end product properties [10].
However, Ahmed et al. [14] stated that both compound were undesired compound that should be removed to improve the mechanical properties and improvised by proper grading of clay particles.
Jalloh, Effect of grain size on selected physico-chemical properties of clay, Am.

In literature [4], the author focused on the 3D numerical prediction of tool wear in metal cutting operations. in their analytical model, the diffusive wear mechanism, heat transfer phenomena at the tool-chip interface and other effect factors were included.
In literature [7], Zro2-based composites with 40 vol. % WC were produced in order to derive correlations between materimal removal rate (MRR), surface finish, wire EDM parameters and material properties.
Ko-Ta Chiang in his paper told us that the main two significant factors on the value of the material removal rate (MRR) were the discharge current and the duty factor.
To a certain extent，the existence of surface affected layer has affected the service life of cutting tool, and has become the second important elements that affected cutting tool life besides the geometry size factor.
The workpiece material and technological parameter of electrical discharge machining influence the affected layer thickness and its physical mechanical property.

Its mechanical properties under different heat treatment conditions were determined by tensile tests.
Composition analyses for the original sheet and T4 samples Mechanical properties of the alloy after heat treatment.
(3) The main factors affecting the alloy performance is the re-dissolution rate of the deformation precipitation and the matrix grain size of heat treatment.
Effect of Gd content on microstructure and mechanical properties of Mg-Y-RE-Zr alloys[J].
[7] WANG J, MENG J, ZHANG D P, TANG D X, Effect of Y for enhanced age hardening response and mechanical properties of Mg-Gd-Y-Zr alloys[J].

Through the equivalent analysis, the length and depth of corrugations are main factors affecting the equivalent elastic constants.
The orthotropic property of the plate derives from different structural properties along both orthogonal directions rather than different material properties.
There are different mechanical properties along directions that having different angles to corrugations.
Because of the corrugation effects, the corrugated plate has different mechanical properties along P and L directions, thus has different elastic constants along P and L directions.
There are different mechanism properties along directions with different angles to corrugations, which should be considered respectively Based on equivalent strain method, Eq. 2, Eq. 7 and Eq. 10 show that the length and depth of the corrugation are main factors to affect equivalent elastic constants.

Furthermore, the shoulder coating effects on microstructure and mechanical properties has been investigated.
The three specimens were obtained for evaluating properties of each welded sample.
Another important parameter that affects the mechanical properties of friction stir welded joint is transverse speed(or welding speed) of tool.
In view of mechanical properties, this imperfection has substantial influence on tensile strength.
Ghasemi: The effect of pin geometry on mechanical properties of PP composite Friction Stir Welds.

Analysis on Influencing Factors of Bus Bar Contact Resistance Shunxin LIU, Wenli HUANG and Zhenhua WEN Zhengzhou Institute of Aeronautical Industry Management.
The influencing factors of contact resistance are analyzed in this paper.
These substances will impede the movement of [4] free electron, thereby increasing the resistance of the parts; increase the amount of resistance caused by these substances called membrane resistance. 1——apparent contact；2——real contact；3——contact pattern Fig. 1 Electrical contact situation Influence Factor Resistance of the contact site may be affected by many factors, which mainly are: the nature of the material, position of contact pressure, contact parts of the processing quality and the temperature rise, the following specific analysis. conductor material resistivity, Brinell hardness, and chemical properties of the metal compounds,  mechanical strength and so on, the resistance size will affect the position of the contact. 
In reality, the need to the above two factors, analysis and judgment of the size of specific contact resistance 2) contact quality and temperature Finish can affect the number of valid contact point contact parts of the contact surface, the contact surface can be rough machining, even by mechanical or electrochemical polishing. 
Each kind of material will have the inflection point -pressure, its value is determined by the properties of the material itself. 

First, this paper analyzes factors that affect the demand for spare parts.
Analysis of factors affecting the demand for spare parts The demand for agricultural machinery spare parts is affected by many factors, such as its own property, region, market and so on.
Parts’ failure rate can be very low due to its stable mechanical properties within their normal lifetime.
Geographical factors.
Steps and processes of neural network forecast BP neural network prediction model will be established based on influence factors, with the inputs being the factors affecting the demand for spare parts, and the ouputs being the demand.

Similarly, Chaudhari et al. [12] showed that extrusion parameters such as die geometry, temperature and ram speed greatly affected the mechanical properties of shaped extrusion, flow pattern, and grain structure.
The processing factors used in this study Factors Level Code -1 0 +1 Ext.
Improving mechanical properties of Al 7075 alloy by equal channel angular extrusion process.
The effect of ram speed on mechanical and thermal properties in ecae process simulation.
Enhancement of mechanical properties of AA 6351 using equal channel angular extrusion.

Effect of Thermomechanical Treatments on the Mechanical Properties of New Low-Cost Ti-Fe-Nb-Zr Alloys Mohamed Abdel-Hady Gepreel1,a and Mitsuo Niinomi2,b 1Egypt-Japan University of Science and Technology, Alexandria, 21934, Egypt. 2Institute for Materials Research, Tohoku University, 2-1-1, Katahira, Sendai 980-8577, Japan ageprell@yahoo.com, bniinomi@imr.tohoku.ac.jp Keywords: Ti-alloys, low-cost alloys, biomaterials, mechanical properties, heat treatments Abstract.
The development of new low-cost alloys composed of common elements that show high biocompatibility and mechanical properties matching with human bone is the target of many researches recently.
In this paper, the effect of heat treatments on the fundamental mechanical properties of the newly developed meta-stable β-type Ti-xFe-3Zr-yNb (x=3-8 & y=2-3, at.%) alloys is explored.
The type and amount of the meta stable phases (ω, α ', α '' and β) retained by quenching in the ST process seem important factor to affect the final overall hardness of the alloy.
The Fe-content in the alloys is very effective in controlling the phases constitution and hence the resulted mechanical properties.