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The section of steel column under axial compression presents heterogeneous material and its load condition changes after experiencing fire damage of one side.
The member section presents heterogeneous material and its load condition changes after experiencing fire damage of one side.
According to the method of materials mechanics, geometric characteristics and mechanical parameters of H-section whose whole section is in the elastic state post fire are as Eq. 3 [5].
Journal of PLA University of Science and Technology (Natural Science Edition).Vol.11(2010) , p. 328.
Mechanics of Materials.

ODS steels (Oxide Dispersion Strengthened) are candidate materials for fuel cladding in Sodium Fast Reactors (SFR).
These materials have good mechanical properties at high temperature due to a dispersion of nanometer-sized oxides into the matrix.
These materials are manufactured by powder alloying and contain nanometric particles of oxide which are anchors against dislocation movement improving the performance of these materials at high temperature.
Journal of Materials Science, 2007. 42(13): p. 5286-5295
Journal of Nuclear Materials, 2004. 329: p. 1534-1538

It is well known that properties of most cellular structures are depended on the mechanical properties of cell materials, foam relative density, and foam microstructures.
Constitutive Relations of Cell Material Most polymers carried loads in short time and at normal temperature could be treated as hyperelastic materials.
Brühwiler: International Journal of Solids and Structures, Vol. 46(2009), p.677 [6] N.J.
Zhu: Journal of the Mechanics and Physics of Solids, Vol. 47(1997), p.669 [7] Fan Zhi-geng, Chen Chang-qing et al.: Advanced Materials Research Vols. 189-193 (2011), p. 2087 [8] D.
Yu: International Journal of Impact Engineering,Vol. 28(2003), p.161

Introduction At present, nanometer materials have been widely used in energy, environmental protection, electronic technology, molecular biology, medicine, military and agriculture.
While the researches of the nanometer materials effects on the soil and plants are few.
Materials and methods Test materials The basic physical and chemical properties of the soil in the test were as follows: the content of organic matters was 1.2mg/kg; the content of available phosphorous was 33.4g/kg; pH was 8.16; the conductivity was 456us/cm.
Tang: Journal of Southeast University (Natural Science Edition) Vol. 39 (2009), p. 1315-1319 (in Chinese) [5]H.
Journal of University of Science and Technology of Suzhou (Natural Science) Vol.24 (2007), p. 52-55 (in Chinese) [6] J.

Microstructure and Mechanical Properties of 22MnB5 Steel with Different HeaTreatment Hongwei Liu1, a, Hongyun Zhao1, b,*,Jingbo Yu School of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, China alhw@hitwh.edu.cn, b,* zhaohy6691@163.com , chityjb328@163.com Keywords: 22MnB5 steel; plastic strength product; heat treatment; Microstructure Abstract.
Journal of Materials processing Technology, 2010, 210:2103-2118 [3] HE Lianfang, ZHAO Guoqun, LI Huiping.
Materials Science and Engineering A, 2012, 540:24-29 [5] S.
Metallurgical and Materials Transactions, 2013, 44 (4):1852-1861 [9] XIN Peisen.
Science China Technological Sciences, 2012, 55(3): 646-651 [11] Wang Ying.

Cross-section of the composite sandwich column materials of preparation.
Journal of Aeronautical Materials, 2003,(s1) [2] TAO Jia-qing , LIAO Guang-ming, FEN Ling-xiao.
Journal of Sichuan University (Engineering Science Edition. 2003,(02) [3] ZHANG Bo-ming, LIU Shuang.
Journal of Astronautics, 2007,(02)
Materials Science and Technology. 2008,(05) [5] ZHAO Jia-xiang.

Advanced Materials. 2012,24(2):229-251
Advanced Functional Materials. 2010,20(13):2165-2174
Journal of Materials Chemistry. 2010 2010; 20(18):3656-3664
Advanced Functional Materials [J]. 2010,20(12): 1970-1976
Journal of Hazardous Materials. 2004,114(1-3):183-190

This, in turn, contributes to expanding the applications of laser materials processing technologies [30-41], including the area of welding stainless steels [28, 30, 32-34, 37, 40].
The lack of thermodynamic and thermophysical data on the properties of alloys is one of the important problems in the development of new advanced materials of a complex chemical composition.
The same problem exists also during the application of new methods of thermal influence (for example, laser radiation) on the known and widely used materials.
Shishkin A 2017 Diffusion welding through vacuum-deposited porous interlayers Journal of Materials Processing Technology 247 268-279 doi:10.1016/j.jmatprotec.2017.04.029 [14] Kim J, Kim S, Kim K, Jung W, Youn D, Lee J and Ki H 2016 Effect of beam size in laser welding of ultra-thin stainless steel foils Journal of Materials Processing Technology 233 125-134
Procedia CIRP 74 456-460 doi:10.1016/j.procir.2018.08.151 [37] Alcock J and Baufeld Bb2017 Diode laser welding of stainless steel 304L Journal of Materials Processing Technology 240 138-144 doi:10.1016/j.jmatprotec.2016.09.019 [38] Reisgen U, Krivtsun I, Gerhards B and Zabirov A 2016 Experimental research of hybrid welding processes in combination of gas tungsten arc with CO2- or Yb:YAG-laser beam Journal of Laser Applications 28 022402 doi:10.2351/1.4944096 [39] Shelyagin V, Khaskin V, Bernatskyi A, Siora A, Sydorets V and Chinakhov D 2018 Multi-pass laser and hybrid laser-arc narrow-gap welding of steel butt joints Materials Science Forum 927 64-71 doi:10.4028/www.scientific.net/MSF.927.64 [40] Kuznetsov M, Larin M and Sorokin A 2019 Features of laser welding light constructions from cryogenic austenitic steel 316L Key Engineering Materials 822 512-519 doi:10.4028/www.scientific.net/KEM.822.512 [41] Poznyakov V, Markashova L, Shelyagin V, Zhdanov S, Bernats’kyi A, Berdnikova O and

Similarly, Chen and Li [6] found from their finite element simulation that the maximum erosion loss happened at 30° impact angle for ductile materials, and 90° impact angle for brittle materials.
Yang, Finite element model of erosive wear on ductile and brittle materials.
Papini, Material deformation and removal due to single particle impacts on ductile materials using smoothed particle hydrodynamics.
International Journal of Impact Engineering, 60,(2013) 67-75
Journal of Failure Analysis and Prevention, 7,(2007) 464-474

The influence factors include: man, machine,material, method and environment.
Journal of northeastern university natural science,2012,Vol. 33, No. 6:793-796 [8]Wan Bai-wu.
Beijing:Science Press,2000 [13]Liu Xing-tang, Wu Xiao-yan.
Journal of probability and statistical science,2003, Vol.1:265-279 [17]Bu Guang-zhi.
Journal of the Academy of Equipment Command & Technology,2005,Vol. 16, No.6:48-52