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Gas Sealing Performance Study of Metal W Shaped Seal Ring Minjie Xing1,a, Qing Xue1,b , Shuangfu Suo2 and Chunyan Liu3 1Institute of Mechanical Engineering, Beijing Institute of Technology, Beijing, China 2State Key Laboratory of Tribology, Tsinghua University, Beijing, China 3China Petroleum Materials Corp, Beijing, China axingminjie@126.com, b763060859@qq.com Keywords: Seal, Rough Surface Contact Model, Average Flow Model, Leakage.
(22) (23) Cases of engineering applications The following material properties of metal W shaped ring are selected: E1=1.1×1011Pa, ν1=0.3, hardness H=3.4×108Pa. flange material is usually harder than the seal surface, so E2=2.1×1011Pa, ν2=0.3.
Mathematical and Physical Sciences, Vol. 295 (1966), p. 300 [2] Lo C C: International Journal of Mechanical Sciences, Vol. 11(1969), p. 105 [3] Chang W R, Etsion I, Bogy D B: Journal of tribology, Vol. 109 (1987), p. 257 [4] Kogut L, Etsion I: Tribology transactions, Vol. 43(2000), p. 507 [5] Patir N, Cheng H S: Journal of Lubrication Technology, Vol. 100(1978), p. 12 [6] Burgdorfer A: Trans.
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Introduction With the development of science and technology, a qualitative change in the demand for materials has occurred.
Research and application of smart materials have been paid more and more attentions.
Experimental research 2.1 Experiment materials.
Materials Science and Engineering, 1999, A273-275: 395-399 [9] Miechaud V.
Journal of Ningbo University (nsee), 2003, 16(2): 0136-0139 (in Chinese)

Radar absorbing materials (RAM) can function as shielding materials to reduce or weaken the EMI to a certain extent.
Magnetism and Magnetic materials. 320 (2008) e849-e852
Materials Science and Engineering B. 141 (2007) 61-70
Journal of Alloys and Compounds 470 (2009) 332-335
Magnetism and Magnetic materials 271 (2004) 39-45

The adhesion behaviour between the CFR-Cu material and the coating depends significantly on the coating process and materials respectively.
Specific materials and defect information will be provided and discussed.
Coating of CFR-Cu Composites The properties of many technical products depend on the microstructure of the materials used and the coating applied to these materials.
Coating can be applied to all kinds of materials [7-11].
Hebda, "Analysis of chemical nickel-plating process", Materials Science, vol. 54, no. 3, pp. 387-394, Nov. 2018

Molten materials were covered by charcoal during the melting process.
Materials characterization, 59(2008)1526-1530
[8] S.Ngarjuna,K.Balasubra.Effect of Prior cold work on mechanical Properties, electrical conductivity, and microstructure of aged Cu-Ti alloys,J.Journal material science.34(1999)142-149
Material Science Technocial, 9(1993)142-150
Metallurgical and Materials Transactions A, 25(1994)1403-1412

Cohesive Zone Model and GTN Model Collation for Ductile Crack Growth Vladislav Kozák 1,a, Ivo Dlouhý 1,b and Zdenek Chlup 1,c 1 Institute of Physics of Materials AS CR, Zizkova 22, 616 62 Brno, Czech Republic a kozak@ipm.cz, bidlouhy@ipm.cz, cchlup@ipm.cz Keywords: cohesive zone model, GTN model, J-R curve prediction.
The material is not uniform on the microscale level and the material within an element has its own complex microstructure.
For ductile materials capable of undergoing large post-necking deformations, the determination of such material response curve determination requires an exact approach.
Acknowledgements The research was financially supported by project IA A 200410502 of the Academy of Sciences of the Czech Republic and project 101/05/0493 of the Czech Science Foundation.
Mirone: International Journal of Solids and Structures 41, (2004), p. 3545

By considering the rationality and security of design and manufacture, both the static and dynamic performances of the optimized case is greatly improved, with a 16.36% reduction in maximum stress, a 13.86% reduction in maximum displacement, and successfully saving material 5.87%.
Table 1 The material properties of the circular saw Name Density(ρ/Kg·m-3) Poisson ratio(µ) Elastic modulus(E/*105Mpa) HT250 7150 0.26 1.40 Fig. 3 The radial force distribution Fig. 4 FEM modal for the gearbox case Results of the modal calculation.
Known by the results of the modal analysis and the mass-element density cloud image, the gearbox case overall stress is homogeneous distribution, strain is very little, the main structure load is spot at the both sides of the case(red part); and most of the remaining material strength is not fully used(blue part).
Tian: Journal of Engineering for Thermal Energy and Power, 2003.18:547-551
Ming: Journal of Jiangsu University of Science and Technology,2006,20:65~68

When mining on the floor above confined water, according to mine exploration materials, to do some preliminary analysis about hydro geological condition of the working faces, to forecast the risk of floor water invasion, on the basis of these to develop the work, mine water prevention and control, go well.
Journal of HeNan Polytechnic University (Natural science), 2008, 27(5):514-519.
Journal of HeNan Polytechnic University (Natural science), 2011, 30(2):149-154.
Journal of North China Institute of Science and Technology, 2009, 6(4): 83-86.
Journal of HeNan Polytechnic University, 2005, 24(6):439-442.

Referencing [5, 6], the used materials are elastic materials, such as: Aluminum foam, Quartz sand, Felt, Rubber and so on.
According to use Isight and Ls-Dyna, not only for the critical geometry is optimized, but also some Properties of materials are optimized.
Ma: Journal of Test and Measurement Technology, Vol. 19(2005) No.3, p.249 (In Chinese)
Yan: Mechanical Vibration Isolation Technology (Shanghai Science and Technology Literature Press, China 1985)
Zhang: Journal of Projectiles, Rockets, Missiles and Guidance, Vol. 30(2010) No.3, p.223 (In Chinese).

This material has low heat conductivity and large coefficient of linear expansion, so it is the typical difficult-to-cut material.
The material of work piece was 3Cr1Mo1/4V and dimension was 110×90×70.
The material of cutter was YT535 and structure was wave edge.
Journal of harbin university of science and technology 10(6): 88-91 (2005).
Journal of harbin university of science and technology 2(5): 1-3 (1997).