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The influence from lubricating properties of piston ring has been specifically studied.
We analyzed the impact on the inner excitation from factors including lubricating oil, interface roughness, deformation of cylinder liner and piston skirt.
Fig. 3 Slap force under different impact factors The six curves in Fig. 3 denote six different scenarios.
It is found that with the increasing number of factors being considered in our model, the maximum slap force decreases.
Conclusions We established a theoretical model to describe the kinetic properties of the piston, which accounts for the piston’s secondary motion.

The volume fraction of CaCl2 and sintering temperature are the main factors that affect porosity of copper foam.
The influence of the content of CaCl2 and the sintering temperatures on the porosity, and the effects of porosity and cell size on the mechanical properties of copper foams were investigated.
High temperature mechanical properties of low alloy steel foams produced by powder metallurgy[J].
Mechanical properties of low alloy steel foams: Dependency on porosity and pore size[J].
Metallic foams: their production, properties and applications [J].

Rashid et al[2]. studied the structure and electrical properties of GaP by density functional theory.
Since the GaP bandgap calculated by the band structure is 1.580 eV, a 0.68 eV scissor factor was introduced during the analysis of the optical properties.Fig 3(a)-(c) show the absorptivity, dielectric function, and complex refractive index, respectively of GaP.
First-principles study of the electronic structure, optical properties and anisotropy of GaP[J].
First-principles study of the structural and electronic properties of III-phosphides[J].
Ab initio simulation of the properties of ferroelectric materials[J].

The mechanical properties under compression and the elastic modulus of the cermets were characterized from room temperature to 1400°C.
At 1400°C, both cermets suffered a significant deterioration of their mechanical properties due to a presumed chemical degradation of the individual components.
Both combine their properties of toughness, thermal, chemical and mechanical resistance, resulting in an improved material [2][3].
Therefore, the characteristics of the precursor wood can affect the mechanical behavior of the material to some extent.
This deterioration of mechanical properties can be attributed to several factors, such as degradation of individual components (SiC, Si, TiSi2), accelerated oxidation, and microstructural changes induced by high temperature.

Research on Properties of Ca-Co-O Thermoelectric Material with Adding Sm MU Jie-chen1,a, WEI Xiu-ting1,b and ZHANG Li-peng2,c* 1 School of Mechanical Engineering, Shandong University of Technology, Zibo, China, 2 Wan Jie Group CO.LTD, Zibo, China 255091 amujiechen@sdut.edu.cn,bwjbh2011@163.com, c*lpzhang2007@163.com Key words: Ca3-xSmxCo4O9; sol-gel; microstructure; thermoelectric properties.
The microstructure and thermoelectric properties of ceramics were researched.
The thermoelectric properties of Ca3-xSmxCo4O ceramics were excellent.
The additive affect microstructure of materials [7].
The thermoelectric properties of Ca3-xSmxCo4O9 ceramics were excellent.

Crystal vacancy is one of the most important reasons for elasticity phenomenon of steels, which results in the fact that the Young's modulus is affected by pulling rate.
Introduction Young's modulus is one of the basic mechanical properties of metal materials.
It can not only represent the ability of elastic deformation resistance of materials but also affect the property of deformation springback of workpieces.
So the factors affecting the Young's modulus are very significant.
(Mechanical Industry Press, Beijing, 1999) [2] Liu Yang: Rare Metal Materials and Engineering.

So the load factor and the productive efficiency are high.
Aircraft titanium alloys parts demands excellent mechanical properties, and welding repair problem are brought to the fore.
Compared with the traditional welding processes, laser welding has advantages such as high energy density, low heat input, high weld speed, good microstructural and excellent mechanical properties.
Because of the active chemical properties of titanium alloys, harmful gases such as oxygen, hydrogen and nitrogen would easily be absorbed during welding, and mechanical properties of the joint would decrease obviously.
Because of the advantages of excellent mechanical properties and corrosion resistance, superalloys have been widely applied in aviation and aerospace fields.

Hardening effect as a function of the content of alloying elements [12] The quality of any extruded product is a function of various factors, such as chemical composition, geometrical dimensions, appearance and regularity of the microstructure, variation of mechanical properties over the extruded length and cross section, and surface finishes [4].
There are numerous factors that affect process planning of cold extrusion such as extruded shape and size, tolerance, surface finish, component type, material and quantity to manufacture, etc. [7].
Mechanical properties of tool steel alloy.
The main factors like billet length, billet container, extrusion ratio and extrusion speed will affect metal flow and the resulting properties, structure of the section and its surface finish.
Shapes and Properties

An experimental design was used to investigate the interaction of enzyme dosage and contact time on the beatiability, and both factors were investigated at three levels.
The measurements of beating degree and handsheet properties were following the TAPPI methods.
The dosage of enzymes and the contact time are the main limiting factors affect the application of enzymes.
Effect of enzymatic treatment on the handsheet properties.
The enzyme dosage and enzyme contact are the main factors affect the physical properties of the pulp.

Because of coal winning machine actual working environment is very bad, the objects’ physical and mechanical properties are quite uncertain, coal winning machine output shaft bearing vulnerable to damage, so choose the right bearing is very important.
Introduction The rolling bearing is One of mechanical parts used widely in mechanical equipment.If bearing selection is unreasonable, and it often leads to premature bearing fatigue spalling or a sharp rise in bearing temperature, caused by burning, thereby enabling the bearing locking cage fracture and even rolling element and such as ring broken fault, seriously affecting the reliability of the machine.
Select bearing a variety of factors to consider, judge the main diversity of thinking.
Bearing life correction formula （1） In the formula: load factor; reliability life correction factor: the life of the lubrication correction factor; the life of the lubricating oil filter accuracy correction factor; the life of lubricating oil water content correction factor; material meltinglife modification factor; the life of the material surface hardness correction factcor; the life of the temperature correction factor; the radial clearance of the life correction coefficient; the life correction factor for axial deflection; basic dynamic load N; equivalent dynamic load, N; life index.
Mechanical design and manufacturing,2001,4(10):10-11.