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This sealing material was expected to perform as the shock absorption material.
However, in spite of same material and same thickness, the difference of flow stress appears in each specimen.
Ogawa, Quasi-static and impact compressive properties of formed polyethylene film with closed cell, Journal of the Japanese Society for Experimental Mechanics, (2014) 153-157
[6] H.Kolsky, An investigation of the mechanical properties of materials at very high rates of loading, Proc.
Ogawa, On the effect of mechanical impedance mismatch in the split-Hopkinson pressure bar method, Journal of the Japanese Society for Experimental Mechanics 13 (2013) 244-249

Experimental Materials.
Manias: Chemistry of Materials, 2943-2949(2000) [3] C.M.
Bhowmick: ACS Applied Materials & Interface, 289-300(2008) [5] R.A.
Baer: Journal of Applied Polymer Science, 1207-1217(2000) [7] L.
Manson: Journal of Liquid Chromatography & Related Technologies, 207-230(2003) [8] Y.H.

With the new material development, the strength applied in building is more higher.
Neutral axis moved to compressive zone.the height of compressive zone reduced,the strain of the structural steel and steel bars is yield in tensile zone,then, the materials is yield in another zone.
Beijing, China: Science Press, 2006, - 20
Journal of constructional steel research, 2001, 41 were 1080 -, -
Journal of building structures, 2006, 27 supplement (1) 423-430.

Fig.2 Geometry of test specimen(Unit:mm) Fig.3 The stress-strain curve TABLE 1 MECHANICAL PROPERTIES OF TEST MATERIAL yield strain ultimate strain yield strength/MPa ultimate strength /MPa elastic modulus/MPa 0.022 0.132 240 375 2.06E5 Low Cycle Fatigue Test Condition The fatigue tests were conducted on the MTS Hydraulic Servo Fatigue Machine in ambient air at room temperature according to the "GB/T15248-2008: The test method for axial loading constant amplitude low-cycle fatigue of matallic materials".
Engineering Sciences.
China Civil Engineering Journal.
Journal of Aerospace Power.
Transactions of Materials and Heat Treatment.

Cables, decoration materials and other combustion will produce large amounts of smoke and heat when subway fires, and closed environment will soon be filled with smog, at that time the visibility is almost zero.
Because there are some inflammable things inside subway car, for example, thin flannel decoration materials are used in many new seats, and between car and car is interlinked.
Some old car decorations adopt combustible composite materials, it would rapidly produce a lot of nerve palsy gas to make people poisoning, suffocation, even death.
Acknowledgements This project was financially supported by the Liaoning Science General Project(L2012426).
[2] LI Jincheng: Journal of Natural Disasters Vol.21(2012), p.197-200

Methodology Materials.
Advanced Functional Materials, 31(22), 2100450
Materials Chemistry and Physics, 258(), 123943–. doi:10.1016/j.matchemphys.2020.123943
American journal of infection control, 41(5), S6-S11
New England journal of medicine, 382(16), 1564-1567

Li Xiaoyuan et al.[31] obtained Al/TiO2/Fe2O3, Al/TiO2/Cr2O3, Al/TiO2/Bi2O3 etc. used in the stealth materials by liquid phase deposition.
Acknowledgements This work is supported by the “13115” science and technology innovation project in shaanxi province.
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Consequently, reliable information about early age properties of the material is essential to guarantee life-time performance of structures.
For example, a mineral trioxide aggregate is now being applied as a root-end filling material, which was shown to have a similar chemical constitution to that of Portland cement except for the addition of bismuth compounds, seemingly to make the materials radiopaque for dental use [6].
Fattal: Building Science, No. 94 (1977), National Bureau of Standards, Washington D.C., p. 88 [2] T.
Randall: Nuclear Magnetic Resonance Spectroscopy of CementBased Materials (Eds.
Mitchell: ACI Materials Journal, Vol. 91(1994) p. 349

This phenomenon indicates that the concentration of ablated materials also increased following the increase of time and power parameter.
Saxena, Optical properties of few layered graphene quantum dots, Materials Research Express. 2.9 (2015) 095024
Ruoff, Stable aqueous dispersions of graphitic nanoplatelets via the reduction of exfoliated graphite oxide in the presence of poly (sodium 4-styrenesulfonate), Journal of Materials Chemistry. 16.2 (2006) 155-158
Santoso, The role of reduced graphene oxide concentration as ablated material on optical properties of graphene quantum dots, Material Science Forum, 948 (2019) 267-273
Santoso, Effect of chemical reduction temperature on optical properties of reduced graphene oxide (rGO) and its potentials supercapacitor device, Material Science Forum, 901 (2017) 55-61

Laser-MIG Hybrid Keyhole Welded 6mm Steel/Aluminum Butt Joints Dongqi Lua*, Li Cui, Hongxi Chen, Yaoqing Chang, Zhibo Peng and Dingyong He College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124 a965214930@qq.com Keywords: Steel/Aluminum dissimilar alloy; hybrid welding; laser welding; tensile strength Abstract.
Experiment Experimental Materials.
The test materials for laser-MIG hybrid welding are E36 steel sheets and 5083 aluminum alloy sheets.
The mechanical properties of steel/aluminum dissimilar materials welded butt joints are mainly represented by the tensile strength of the joint.
Deschaux-Beaume, et al, Steel to Aluminium key-hole laser welding, Materials Science and Engineering: A, 447(1-2) (2007) 197-208