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The structure optimization design for the W-type metallic sealing ring based on the MOGA algorithm Xiangyu Ding NanChang HangKong University Jiangxi province Nanchang City South of FengHe road No. 696, China Email:dxiangyu20000@163.com Key words:metallic sealing ring, MOGA optimization algorithm, The outer arm opening angle, The outer arm arc angle Abstract:This paper uses the ANSYS software to analysis the outer arm opening angel(OAOA) and the outer arm arc angle(OAAA) of W-type metallic sealing ring which can effects on the mechanical properties,obtained in that when the OAOA choose from 1.398°to 14.156 °and the OAAA choose from 30.21° to 59.5 °, the mechanical properties of  the sealing ring can satisfy the requirement of use.  
Because of its "seal ring thin-walled, large deformation, precision" on the whole, the development of metallic sealing rings are extremely difficult, and the design analysis process is affected by many factors, design analysis affected by many factors.
Under high temperature, the strength of the material is still very good, its oxidation resistance, fatigue, fracture toughness, plastic and other comprehensive performance are very good also, the basic mechanical properties parameters are shown in Table 1[5].
The size of optimization design  is reasonable, and the sealing ring has better mechanical properties .
Mechanical design manual[M].Bei Jing: Mechanical industry press,1992

The quantitative evaluation of the preferential orientation of crystallites by the synchrotron and neutron diffraction techniques during regeneration at the interface with implant gives a good prediction of the mechanical properties of the bone.
At the interface implant-bone, the new bone reconstituted after implantation must have the same mechanical properties of bone in order to accept the implant.
First used in airspace industry, the Ti-6Al-V alloy has proved both good mechanical properties and biocompatibility.
Therefore, we measured the intensity of the peak (1 1 1), because it is not affected by texture [6,10].
The bond reconstructed at 0,15 mm from the interface is very strength and it is one of the most important factors indicative of the reliability of fixing the implant to the bone tissue.

Identify and evaluate the uncertain factors in pick force analysis.
Estimate and model the uncertainties in the material properties of the pick tips.
Various factors such as cutting modes, rock properties, drum and pick geometry, operational parameters, as well as the material of pick tips can affect these forces.
However, in reality, the factors affecting these forces are often uncertain and unpredictable.
Modeling the Properties of the TSDC TSDC is a type of new material.

Fabrication and Mechanical Properties of ZrO2/Ni Functionally Graded Materials M.
The distributions of mechanical properties in the FGMs are obtained from the mechanical testing of homogeneous composite samples with different volume fractions of Ni.
Most the researches concerned the used the ceramic/metal FGMs for studied the mechanical and thermal properties of the gradient structure [5-9].
Also, the mechanical properties were studied such as Vickers hardness, which was reduced monotonously with increasing the content of iron.
The mechanical properties of Si3N4–Al2O3 FGM joints with 15 layers for high-temperature applications were investigated.

Increased plastic production and consumption, difficult to decompose characteristics [4, 5] and short life cycle [1, 6] can be factors that cause plastic waste problems [7, 8].
In the previous research, repetitive recycling with implementation of material value conservation revealed that degradation of mechanical properties occurred during recycling processes but recycled product can still be used as alternative raw material based on mechanical properties [21].
The characteristics of material plastics are one of the factors affecting colour [26], transparency [27] and gloss [10].
Surface arrangement, inside layer arrangement, material temperature and mould temperature are important factors which influence colour and gloss in the recycling processes [10].
Sardon, Packaging materials with desired mechanical and barrier properties and full chemical recyclability, Nature Communications, Vol. 10 no. 1 (2019) 1–7

Mechanical Model and Influencing Factors of Fatigue Life Mechanical Model of Shaft with a Circumferential �otch for Life Estimation.
There are many factors to affect the fatigue life of shaft with a circumferential notch.
The other class, such as geometrical factors, materials property, environmental conditions and other factors, which show in left column, can not be described by parameters.
Influencing factors to affect the fatigue Life of shaft Supporting conditions and Manufacture Materials property Parameters of notch Environmental factors assmble factors other factors form Loading Geometrical factors Fig.2 Kinds of factors to affect the fatigue life of shaft Table 1 Influencing factors on fatigue life and descriptive parameters Kind of factor Influencing factor Kind of factor Influencing factor Descriptive parameters Geometrical factors Dimension of notch Loading forms Loading course M, T Shape of shaft Loading amplitude Mmax,Tmax Position factors Loading frequency ω Materials property Chemical element Manufacture and assemble factors Manufacture precision ε Hardness of material Assemble precision δ Wearability Degree of lubricity ∆ Environmental conditions Corrosion fatigue Parameters of notch Tip radius ρ Heat fatigue Depth of notch h Wear and friction Open angle α Other factors
The second class can not be described by parameters, such as geometrical factors, materials property, environmental conditions and other factors

TRIP steels, or Transformed Induced Plasticity steels, have excellent mechanical properties if compared with conventional steels.
The factor found to affect material recovery the most was the bending angle.
Introduction TRIP steels or Transformed Induced Plasticity steels have excellent mechanical properties if compared with conventional steels.
The mechanical properties experimentally evaluated for the steel are provided in Table 2.
Girault: Bainitic transformation in TRIP-assisted steels and its influence on mechanical properties, (PhD Thesis, Katholieke Universiteit Leuven, Leuven, BELGIUM 1999)

Moreover, the mechanical properties was investigated by Vickers hardness testing.
Table 1 The mechanical properties of the lithium disilicate glass-ceramic specimens.
It was found that the heat treatment temperature affects the on mechanical properties in the lithium disilicate glass-ceramic.
Besides the mechanical property, the translucent property of the lithium disilicate glass-ceramics is another important property which needs to be concerned because the translucent is one of the factors affecting the esthetics, adding the confidence to the patients and is also critical for fabrication of dental.
Thiel, Mechanical properties of polymer-infiltrated-ceramic-network materials, Dent.

Indirect coupling method includes such assumption: temperature effect causes deformation, but deformations will no longer affecting the non-coupling situation of temperature, which means simply considering the influence of heat on displacement filed, not the influence of displacement on temperature field. [5]And that the direct coupling method is able to consider the bi-directional coupling between stress strain field and temperature field, which considered more factors comparing with indirect coupling method.
All selected parameters of material refer to Mechanical Engineering Manual, Manual of Physical Properties for Metallic Material and Manual of Mechanical Properties for Metallic Material.
Fig.2 Distribution and amplification results of temperature field Fig.3 Distribution of overall displacement field and interlayer normal stress of cooker bottom Fig.4 Distribution conditions of interlayer normal stress and shear stress Because of the thermal expansion properties of materials are different, the thermal stress is caused.
Beijing: Mechanical Industry Press, 1981
Mechanical Design [M].

SOLUTION TREATMENT TEMPERATURE AND TIME, QUENCH PROCESS AND MEDIA, AS WELL AS ARTIFICIAL AGEING TEMPERATURE AND TIME ARE THE KEY FACTORS TO DETERMINE MECHANICAL PROPERTIES.
BESIDES THESE FACTORS, NATURAL AGEING, I.E.
THE HOLDING TIME BETWEEN QUENCHING AND THE STARTING OF ARTIFICIAL TREATMENT AT AMBIENT TEMPERATURE WAS OBSERVED TO BE SIGNIFICANT AFFECT MECHANICAL PROPERTIES OF THE ALUMINIUM ALLOYS.
THE RESULTS SHOW THAT NA HAS A POSITIVE INFLUENCE ON MECHANICAL PROPERTIES OF THE RHEO-CAST 319S ALLOY. 1.
Introduction Due to excellent castability and good mechanical properties, Al-Si-Cu-Mg system alloys have been widely employed in automobile, railway and aerospace industries [1,2].