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Wu: Chemistry of Materials Vol. 12(2000), p. 1354-1360
Bilsborrow et al.: Journal of Materials Chemistry Vol. 9 (1999), p.2537-2544
Shen: Journal of Materials Science Vol. 41(2006) p.3473-3480
Chen: Journal of Colloid and Interface Science Vol. 259 (2003), p.282-286
Teng et al.: Journal of Materials Research Vol.12(1997), p.1076-1082

(a) (b) Fig.6 Micro morphology of rapid propagation area (S=600MPa, N=2.22×105) (a) plastic fracture area (b) brittle fracture area Why the rapid propagation area appeared.The ability of materials to resist crack propagation called fracture toughness represented by KΙc, which is a constant for materials.
Journal of Constructional Steel Reseach, Vol.58(2002), p.3~20
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Materials Science and Engineering, Vol.

Materials & Design. 94 (2016) 457-466
Elsa, Pre-threaded hole friction stir spot welding of AA2219/PP-C30S sheets, Journal of Materials Processing Technology. 273 (2019) 116272
Kokabi, Aluminum/steel joints made by an alternative friction stir spot welding process, Journal of Materials Processing Technology. 224 (2015) 1-10
Materials Science and Engineering: R: Reports. 50 (2005) 1-78
Ma, Pinless Friction Stir Spot Welding of Mg‒3Al‒1Zn Alloy with Zn Interlayer, Journal of Materials Science & Technology. 32 (2016) 76-88

a lxp810525@163.com,. bdgzhou@njfu.edu.cn, cswang@utk.edu, d812522021@qq.com Keywords: Castor stalk, Different layers, Chemical characters, Pyrogenation-characters Abstract: Castor is one kind of excellent woody materials and can be used to make wood based panel instead of the wood materials.
So the fire caused by woody decoration materials would be more and more.
Materials and methods Prepare of the castor stalk powder Castor stalk is from Zibo city, Shandong province, China.
Because the first phase is the dry stage and the pyrogenation of the wood materials is begin from the second phase, so it only studied the relationships between the pyrogenation (the pyrogenation of wood materials in the second and third phase) and the chemical composite amount.
JOURNAL OF ZHE JIANG UNIVERSITY (MEDICAL SCIENCES) , 2005, Vol. 34(3), p. 217-219

In addition models of thermal conductivity for porous materials mostly only take a single solid component into consideration [8].
This study chooses clay, peat soil, mushroom planting soil (discarded), sand and expanded perlite as solid materials of the planting soil, all of which are commonly used in green roof.
Additionally when different materials mix, the smaller size granule would filled pore of other materials, increasing the contact area of solid particles, and finally lead to the growth of ETC.
Acknowledgements This research was supported by National Natural Science Foundation of China (Project No. 50978261) and Science Research Foundation of Xihua University (Project No.
References [1] Ministry of Construction, PRC: Technical specification for planted roof(JGJ 155-2007) (China Building Materials Press,2007) (In Chinese) [2] Mingfang Tang, Zhenjing Yang and Kaili Zheng: Journal of Chongqing Univ.Vol.30(5) (2007), p.1(In Chinese) [3] Jagjiwanram and Ramvir Singh: Applied Thermal Engineering.Vol.24 (2004),p. 2727 [4] C.

[2] ZHANG shao-hui and CHEN hua-ling: Journal of Aeronautical Materials, Vol. 22 (2002), p. 58-62(In Chinese)
[5] ZHANG shao-hui and CHEN hua-ling: Journal of Aeronautical Materials, Vol. 25(2005), p. 53—57(In Chinese)
[13]MJ Robinson and JB Kosmatka: Journal of Composite Materials, Vol.40 (2006), p.2157-2173
[15]Biggerstaff JM and Kosmatka JB: Journal of Composite Materials, Vol. 33(1999), p.1457-1469
Chang: Journal of Composite Materials, Vol.19 (1988), p. 834-855

[8] j. hou, chung, journal of materials science, 32 (1997) 3113-3121
Ahmad, in: International Conference on Sustainable Materials 2007, 2007
Cai, Materials Letters, 62 (2008) 2441–2443
Shahid, Journal Of Materials Science, 32 (1997) 3775-3781
Cao, Materials Chemistry and Physics, 76 (2002) 228–235

The k is the elastic materials parameter defined by: Plane stress Plane strain k= (3) In this study the crack direction has to be determined under linear elastic condition.
Acknowledgments The authors would like to thank Keretapi Tanah Melayu Berhad (KTMB) for supplying the rail track materials and to Ministry of Science, Technology and Innovation (MOSTI: 03-01-02-SF0052) for sponsoring this work.
International Journal of Fatigue, Volume 21, (1999), p.181-185
Journal of Zhejiang University of Science: An International Journal of Applied Physics and Engineering, Springer Link, Volume 8, No.2, (2007) p. 228-236
International Journal of Automotive Technology, Volume 12, No. 2, (2011), p. 225−232

Experimental Materials.
Journal of Hazardous Materials, 331 (2017), 257-264
Materials & Design, 116 (2017), 246-252
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Experimental Materials.
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