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The corresponding constants were the mechanical constants of the materials.
All of the materials are all free boundary conditions in the plate.
De Wilde, A mixed numerical/experimental technique for the nondestructive identification of the stiffness properties of fibre reinforced composite materials, Journal of NDT&E International 30 (2) (1997) 85-91. [5] E.O.
Pagnotta, Determining material properties in anisotropic plates using genetic algorithms and vibration test data, International Journal of Mechanics and Materials in Design 1 (2004) 199-211
Science 1983;220:671-80.

The material behavior of FRP is shown in Table 1.
Based on the mechanical properties of materials and Code for Design of strengthening concrete structure[11],Taking, , .When==0.3(,is respectively the fatigue stress ratio of compressive concrete and tension steel bars), can be calculated by Eq.1 to Eq.4,and the calculated values are shown in Table.3.
Acknowledgements This work was financially supported by Natural Science Foundation of Jiangxi Province (20142BAB216004)and the Youth Science Foundation of Jiangxi Provincial Department of Education(GJJ13712).
Construction and Building Materials,Vol.25(8) (2011),p.3520-3529 [5] Mohsen Shahawy,Thomas E.Beitelman.Static and fatigue performance of RC beams strengthened with CFRP laminates.
Journal of Building Materials 2006;9(3):302-306( in Chinese) [7] Xujun Chen, Huafeng Li,Yongxin Yang.

Paszkiewicz¹ 1 Faculty of Materials Science and Ceramics, AGH - University of Science and Technology, Cracow, Poland ² Faculty of Pharmacy, Jagiellonian University, Cracow, Poland a aneta.zima@gazeta.pl, b mfmycek@cyf-kr.edu.pl Keywords: hydroxyapatite implants, ceramic carriers of drugs.
Materials and Methods: Hydroxyapatite powder [HAp-Ca10(PO4)6(OH)2] synthesized by "wet" method in the Bioceramic Laboratory of the Department of Ceramic Technology, Faculty of Materials Science and Ceramics, AGH-University of Science and Technology was used for the preparation of microporous carriers.
Physicochemical properties of the materials obtained were studied.
The materials studied exhibited total porosity in the range of 1540%.
Physicochemical properties of the investigated materials.

New materials are the pillar, driving force and precursor in the hi-tech development.
Agert: Solar Energy Materials and Solar Cells, (2001) 66(1-4), p.541-550
Kayali: Materials Science and Engineering, (2006) 131(1-3), p. 94-99
Hupkes: Journal of Applied Physicd, (2004) 95, p.1911
Mir: Materials Science and Engineering C, (2008), 28(5-6), p. 613- 617.

Analysis of the Rate Constant for Hydration Kinetics of the Cement and Ash fly in the Solidified Residues System Based on the Measurement of Ca(OH)2 Qin Li 1,2,3,a, Xiao Jun Zhou2,b, Ke-wei SUN 3,c (1 Environmental Engineering Faculty, Kunming University of Science and Technology Kunming 650500 2 Yunnan Open University, Kunminng 650500 3 National Engineering Research Center of Waste Resource Recovery, Kunming University of Science and Technology, Kunming 650093) aliqin6688@126.com, bjane1960@163.com, csunkewei2005@163.com Keywords: cement; ash fly; concrete residues; kinetics; cementitious materials Abstract: Based on the hydration kinetics of the cement matrix material, the paper presents a chemical analysis method by means of analyzing the contents of Ca(OH)2 in cement matrix material.
Therefore, Ca(OH)2 is not only the hydration products of the cement, but also the raw materials of reaction of ash fly and pozzolana.
Kinetics model for the hydration mechanism of cementitious materials[J].
Journal of The Chinese Ceramic Society, 2006,34(5):555-559
Methods of chemical analysis of cement material [M].

At present the materials used are still metals.
Materials Science and Engineering 508
Procedure Material Science. 5, 802 – 808
Materials Science Forum. 1013, 69-74
International Journal of Materials Science and Engineering (IJMSE). 8(3), 93 – 98

This technique has been widely used in aerospace materials, heat-resistant materials [1, 2], electronic packaging [3], and ceramic materials over the past decades.
In addition, there are great prospects of this method to weld the new composite materials [5, 6], single crystal materials and a multitude more[7].
Guan: Journal of Materials Science.
Welding Journal.
Ojo: Materials Science and Engineering A.

The composite materials are materials composed of two or more phases which differ with their mechanical, physical and chemical properties.
Polymers can be ranked among easily filling materials.
Wong, Contrast on Tensile and Flexural Properties of Glass Powder Reinforced Epoxy Composites, Journal of applied polymer science 123 (2012) 152-161
Mai, Effect of hybridization of liquid rubber and nanosilica particles on the morphology, mechanical properties, and fracture toughness of epoxy composites, Journal of Material Science 48 (2013) 3546–3556
Di, Mechanical property of nano-particles reinforced epoxy resin composite materials, Advanced Materials Research 181-182 (2011) 99-102

The kAl-Co is highest because the nature of solid materials must give thermal conductivity greater than porous materials [25, 26].
Matsumura: Journal of Thermal Science and Technology, Vol. 10 (2015), p. 1
Marek: Chemical Engineering Science, Vol. 27 (1972), p.1845
Peumsuwan: Naresuan University Science Journal, Vol. 9 (2012), p. 57 (in Thai)
Krittacom: Applied Mechanics and Materials, Main Theme: Materials Engineering and Automatic Control III, Vol. 575 (2014), p. 41

Effects of Die tooth Profile on Forming Helical Tooth Shaft in Cross Wedge Rolling Huajun Yan1, a, Jinping Liu2,b, Zhenghuan Hu2, Pengbiao Han1,c, Haoen Mao1 and Shibo Ma1 1School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China 2School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China ayanhj22@163.com, brollpart@me.ustb.edu.cn, chpb68@163.com Keywords: Cross wedge rolling, Helical tooth shaft, Die tooth profile, Height of tooth, Pitch Abstract.
Due to the complex structure of the helical tooth, a lot of processing operations in machining are required, the precision requirement of the equipment is high and some materials may be wasted.
References [1] Zongji Wang: Manufacture and Materials, 2002, 39(439), p. 33.
Pater: Journal of Materials Processing Technology 2005, 164-165, p. 1154
[6] Junjie Zhao, Zhenhai Ma, Zhenghuan Hu: Journal of Iron and Steel Research. 2002, 14(1), p. 22.