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According to Chinese technical standard for metro shield tunneling construction (DGTJ08-2041-2008), the parameters of the circular tunnel are set as: the diameter is 6m; the thickness of lining is 0.4m; the material is C50 concrete, with density of 2450, elastic modulus of 34.5GPa and Poisson's ratio of 0.167.
(in Chinese) [2] Zhenpeng Liao: Introduction to Wave Motion Theories for Engineering, Science Press, Beijing (2002).
[4] Jinbo Liu, Yixin Du, Qiushi Yan: Viscous-spring artificial boundaries and Seismic input in common FEM software, Journal of Disaster Prevention and Mitigation Engineering, Vol.27, Suppl.
(in Chinese) [6] Chenghsun Chen, Taitien Wang, Tsanhwei Huang: Case Study of Earthquake-Introduced Damage Patterns of Rock Tunnel and Associated Reason, Chinese Journal of Rock Mechanics and Engineering, Vol.30 (1) (2011), p. 45-57.
Stiros: Earthquakes and Seismic Faulting: Effects on Tunnels, Turkish Journal of Earth Sciences (Turkish J.

Material and methods Experimental device description.
Pesticide Science, Vol49(1997).p: 243-251
Journal of the American Water Resources Association.
Soil Science, Vol60(1993).p: 246–251
Journal of Lanzhou University(Natural Sciences), Vol44(2008).p: 47-50

We should take into account the fact that carbon nanopowder (CNP) is a carbon based material having a nominal diameter of 100nm.
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 231(4) (2017) 695–703
International Journal of Heat and Mass Transfer 74 (2014) 285–291
The Canadian Journal of Chemical Engineering, 93 (10) (2015) 1830-1837
Shibahara, Thermophysical properties of carbon-based material nanofluid, Int.

., 46, Belgorod, Russia cSchool of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong, China a*shoshin234@mail.ru, bvvstrokova@gmail.com, cmse_yezm@ujn.edu.cn Keywords: calcium silicate dispersion, modifying carbohydrate, sucrose, lactose, granulometry, setting time, strength of cement concrete.
Materials and Methods As a cement binder, Portland cement 42.5H CEM I (Holsim (RUS) LLC) was used.
Zhernovsky, Structure formation in alkali activated aluminosilicate binding systems using natural raw materials with different crystallinity degree, Construction Materials and Products, 1 (4) (2018) 38–43
Volodchenko, Influence of artificial calcium hydrosilicates on the hardening processes and properties of non-autoclave silicate materials based on unconventional aluminosilicate raw materials, Construction Materials and Products, 3 (2) (2020) 19–28
Magomedov, Influence of man-made aluminosilicate raw materials on physical and mechanical properties of building materials, IOP Conference Series: Materials Science and Engineering, 327 (2) (2018) 022104

However, it is possible to speed up the resorption by creating porosity inside the materials.
Water was added to both materials at a liquid-to-powder ratio of 0.32 mL/g to obtain a paste.
The apatitic phase (2θ=26º, 30.5º-33º) developed during the first two weeks for both materials.
Figure 4 shows the weight loss for the two materials during the 42 days in SBF.
Thereafter the strength decreased in both materials.

Sakidjac University of Wisconsin-Madison, Department of Materials Science and Engineering, 1509 University Ave., Madison WI 53706, USA a perepezk@engr.wisc.edu,b frioult@cae.wisc.edu, crsakidja@facstaff.wisc.edu Keywords: Oxidation Resistance, Mo-Si-B Alloys, Borosilicate Coating, Pack Cementation Abstract.
Indeed, coatings usually behave as interfacial materials since their processing and performance are dominated by the characteristics of internal interfaces.
[11] Shiota, I., Critical Issues in the Development of High Temperature Structural Materials, N.S.
Fordham, Journal of European Ceramic Society, 1992. 10: p. 348
Rapp, Materials Science & Engineering, 1992.

Experimental studies were carried out using the standard equipment of the installation. 2 Materials and Methods 2.1 Experimental installation UVN-200MI.
Mari (Eds.), Comprehensive Hard Materials, 2 Elsevier Ltd, Ceramics Oxford, 2014
Kassavetis, Materials 8 (2015) 3128-3154 [16] M.
Harra, Journal of Vacuum Science & Technology 13 (1976) 471 [41] E.
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Jedlinski1,2,a 1 Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Reymonta St. 23, PL-30-059 Krakow, Poland, 2 Surface Spectroscopy Lab, Joint Centre for Chemical Analysis and Structural Research, Jagellonian University, Krakow, Poland a e-mail : jedlinsk@uci.agh.edu.pl Keywords: high temperature oxidation, alumina formers, oxide scale failure Abstract.
The 18O2 exposure-based approach was used to investigate the failure mechanisms of the oxide scales growing on alumina-forming materials.
The results of chemical analysis of the materials are shown in Table 1.
Stringer: Journal de Physique Vol.
Stott: Materials Science Forum Vol. 251-254 (1997) p. 19

Polymer materials flowing through the Die-plate are extruded from die-hole to cooling water, and then are cut into pellets by rotation knives.
In this process, the temperature uniformity of Die-plate can affect the flow rate uniformity of polymer materials directly.
The physical properties of materials Material Density [kg/m³] Specific heat [j/(kg·k)] Coefficient of heat conductivity [w/(m·k)] Die-plate 8030 502.48 16.27 Hot oil 830 2504 0.8 PP K7760 770 2300 0.2416 Pelletization Quality Assessment.
De A, The influence of ECAP die channel geometry on shear strain and deformation uniformity, Materials Science Forum. 584-586 PART 1(2008)145-150
[2] Shixiong Ren, Tao Lu, Shasha Dang, Kuisheng Wang, Numerical simulation of temperature field of die for polypropylene pelletizing under water, Journal of Mechanical Engineering/Jixie Gongcheng Xuebao. 7(2009)274-277, In Chinese

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Xu: Advanced Materials Research, vol. 148-149 (2011), pp. 674 [9] N.
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