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Introduction In recent years, composite materials have been widely applied in many fields because of the possibility in creating materials that are light-weight yet strong.
Such materials usually consist of reinforcement and matrix.
Material and Equipment Materials.
Gorga: Journal of Composite Materials, Vol.40 (2006), p.1511
Yu: Materials Letters , Vol.60(2006), p.3319

The essence of smeared crack model is smearing the actual materials’ cracks into the whole unit, using the material constitutive model to simulate the influence of cracks.
(1) Materials’ crack criterion Crack criterion is a strength criterion to judge whether the unit will crack.
So we first analyze small-cracks’ (inside the samples) influence on tensile strength, and evaluate open-model’s applicability to soil materials tensile crack at the same time.
Xi’an: Shannxi Science and Technology Press.2000.
Journal of Hehai University, 2001,(6):106-108.

Meanwhile the price of composite materials is more expensive than the price of the traditional construction materials.
Conclusions The 21st century is the era of composite materials.
Elsevier Science Ltd.2001:27-40
Hong Kong: Elsevier Science Ltd, 2001:27-40
Journal of Zhejiang University of Technology, 2003 (2)

Discussion Many attempts have been made to improve the machinability of austenitic stainless steels by adding free-machining elements, such as sulfur, lead, selenium and tellurium, because these steels are typical difficult-to-machine materials [6].
Naoki: Key Engineering Materials, Vol. 407-408 (2009), p 416
Bernat: Environmental Earth Sciences, Vol. 64 (2011), p. 1257
Jia: Journal of Materials Engineering and Performance, Vol. 6 (1997), p. 215
Peter: Australian Journal of Chemistry, Vol. 64 (2011), p. 812.

After the experiment, the students were asked to write scientific papers, which including abstract, introduction, experimental materials, methods, results, discussion, and references, etc.
Journal of Jilin Institute of Chemical Technology, 2009, 26 (2): 50-55.
Food science, 2004, 24(3)139-142.
Journal of nanjing university of Traditional Chinese medicine, 1999, 15(2): 90-93.
Science and technology information, 2009, 17: 17.

With the development of science and technology, high-strength materials come forward continually, so the strength of materials is not the main considered problem for structural safety, whereas the stability problem of structure becomes very serious.
Convex modelling of material uncertainty in vibrations of a viscoelastic structure.
AIAA Journal 1994; 32:843-849
Journal of Optimization Theory and Applications 1995; 86:669-683
The Theory of Natural Vibration of MDOF Structures, Science Press of China, 1987 (in Chinese)

Effect of Nb on Transformation and Property of C-Si-Mn-Cr-Mo High Strength Hot-Rolled DP Steel Le-yu Zhoua, Bo Jiangb, Dan Zhangc, Chao-lei Zhangd, Ya-zheng Liue School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China azhouleyu@ustb.edu.cn, bjiangboustb@163.com, czdcamel@126.com, dzhangchaolei@ustb.edu.cn, dlyzh@ustb.edu.cn Keywords: Nb; Hot-rolled DP steel; Transformation; Microstructure evolution; Mechanical property Abstract.
Experimental material and method Experimental materials.
Design of process parameters for dual phase steel production with strip rolling using the finite-element method [J], Journal of Materials Processing Technology, 1999, 92-93: 486-493 [4] Suwanpinij P, Togobytska N, Prahl U, et al.
Journal of Iron and Steel Research, International, 2011, 18(Sl-1): 615-620 [6] Niakan H, Najafizadeh A.
Materials Science and Engineering: A, 2010, 527(21): 5410-5414.

Introduction The degradation of lignocellulose materials is one of key technologies in biomass energy use, there were many physical, chemical and biological pretreatment methods to increase the straw lignocellulose degradation level[1, 2].
Material and Methods Experiment material.
Conclusion The degradation of lignocellulose materials is one of the key technologies in biomass energy use.
D20081401), Department of Housing and Urban-Rural Development of Hubei Province science project (Grant No.
Karimi, “Pretreatment of lignocellulosic wastes to improve ethanol and biogas production: a review,” International Journal of Molecular Sciences, vol. 9, no. 9, pp. 1621, 2008

These images presented the copper-clad steel surface had a different degree of corrosion, the combination of the two materials in moderate salinized soil solution showed obvious cracks.
Journal of Materials Research and Technology, 2012, 1(3): 161-166
Corrosion Science, 2014, 80: 309-317
Construction and Building Materials, 2013, 40: 908–918
Journal of Shanghai Jiaotong University(Agricultural Science), 2008, 26(8): 578-583

Materials and test method Materials and Specimens.
Vohringer, Material Science and Engineering, A293(2000), 191-197 [2] S.
Komotori, Materials Processing Technology, 209(2009), 6156-6160 [3] Y.
Kawasaki, Journal of Japan Institute of Metals, Vol. 77, No.1(2013), 7-13 [4] S.
Kawasaki, Journal of the Society of Material Science JAPAN, Vol. 60, No.12(2011), 1091-1096