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Through the finite element analysis, studies on mechanical performance of prestressed steel-concrete composite beams when it is undered the low reversed cyclic loading, based on constitutive model of elastic-plastic and consider nonlinear property of materials, it indicated good agreement with the experiment.
Test parameters In this paper, simulate research based on the seismic performance test of prestressed steel- concrete composite beams, establish the model according to the data provided by the experiment parameters model and various kinds of materials.
China Civil Engineering Journal. 2011,44(2): 8-20.
Journal of Shenyang Jianzhu University(Natural Science), 2005, 21(3): 192-195.
Journal of Shenyang Jianzhu University (Natural Science),2010, 26(4): 695-698,715.

The experimental procedure Materials.
Both regimes demonstrate some non trivial behavior of materials.
Palmieri, On the optimisation of superplastic forming processes by the finite-element method, Journal of Materials Processing Technology 143–144 (2003) 373–377
[9] R.A.Vasin, F.U.Enikeev, M.I.Mazurski, Applicability of Bibgham-type constitutive models for superplastic materials at different loading conditions, Materials Science Forum 170-172 (1994) 675-680
Zhang, Effect of strain rate path on cavitation in superplastic aluminium alloy, Materials Science and Engineering: A 463 (2007) 224-230

The article discusses flexible struts, reinforced with composite materials, located in the transverse direction.
In 2004, a set of rules for strengthening reinforced concrete structures with composite materials was issued in Russia, which gave impetus to the use of new types of materials on a legislative basis.
To make changes to the strength calculation algorithm for transverse reinforcement with composite materials.
The characteristics of materials, including composite materials, the structure of the rack frames, the strengthening method and testing are detailed in [9-11].
Sciences, Moscow, 2010

Journal of Materials Science 47 (2012) 7782-7788
Materials Science and Engineering 83 (1986) 115-121
Journal of Nuelear Materials 299 (2000) 91-100
Journal of Nuclear Materials 279 (2000) 31-45
Materials Science and Technology 27 (2011) 966-969

Journal of Tool Engineering,Vol.44 No.7 (2010) 40-42
Development of an analytical model for drilling burr formation in ductile materials[J].
Journal of Engineering Materials and Technology. 2002，124(2)：192-198
Materials Science and Engineering A. 2005，397(1-2)：153–156
Journal of Mechanical Engineering, 1(1999) 42-43.

Corrugated steel webs have crinkled effect without capacity bearing the axial force and bending moment, which leads to its effective elastic modulus is smaller than that of material.
Engineering practice shows [3, 4] that medium and large span bridges have better economic benefit combined with corrugated steel web PC box-girder composite structures, which can reduce the weight of the superstructure, so the materials of substructure decrease and cost of the bridges is lower [5, 6].
Libove, Stiffness tests of trapezoidal corrugated shear webs, Journal of the Structural Division, ASCE, 5 (1977) 1031-1045
Wang, Experimental test of structural property of prestressed concrete box-girder with corrugated steel webs, Journal of Nanjing University of Science and Technology, 28 (2004) 498-501
Elgaaly, Bending strength of beams with corrugated webs, American Society of Civil Engineers, Structural Journal, 6 (1997) 285- 299

Experiment Materials.
Ismail, and M.Tavman.: Thermal Conductivity of Particle Filled Polyethylene Composite Materials, Composites Science and Technology, (2003)63(1):113-117
Journal of Composite Material, (2008)42(2):173-186
[6] Agari,Y. and T.Uno..: Estimation on Thermal Conductivities of Filled Polymer, Journal of Applied Polymer Science, (1986)32(5):705-708
:Dynamic Mechanic Properties of Particulate-filled composites, Journal of Applied Polymer Science, (1970)14(1);449

Materials and Methods Materials.
Ramakrishna, Interaction of Cells and Nanofiber Scaffolds in Tissue Engineering, Journal of Biomedical Materials Research Part B: Applied Biomaterial. 84B (2008) 34-48
Ramakrishna, Interaction of Cells and Nanofiber Scaffolds in Tissue Engineering, Journal of Biomedical Materials Research Part B: Applied Biomaterial. 84B (2008) 34-48
Hutmacher, The return of a forgotten polymer-Polycarprolactone in 21st century, Progress in Polymer Science. 35 (2010) 1217-1256
Jansen, The performance of dental pulp stem cells on nanofibrous PCL/gelatin/nHA scaffolds, Journal of Biomedical Materials Research Part A. 93A (2010) 247-257

The mechanical properties of three materials are given in Table 1.
The Fig. 3 exhibits the resultant force-displacement of the materials.
Rasheed: International Journal of Engineering Science (2012) Vol. 50, p. 151-165
[4] H.Y.C and F.K.C: Journal of Composite Materials (1992) Vol. 26, p. 2134
Kirwan: Composites Science and Technology (2012) Vol. 72, p. 211-217

A Study on the Phenomenological Constitutive Models of AZ80 and AZ31 Magnesium Alloy Forming at Elevated Temperatures Yong Xue1, 2, a, Zhi Min Zhang1, b, Yao Jin Wu1, c, Guang Lu1,d 1 North University of China, School of Material Science and Engineering, 030051 Taiyuan, China, 2 Beihang University, School of Mechanical Engineering and Automation, 100191 Beijing, China amerryjukii@msn.com, bzhangzhimini@nuc.edu.cn, cmerryjukii@hotmail.com,d forge54@163.com Keyword: AZ80 magnesium alloy, Constitutive model, Dynamic recrystallization, Strain softening Abstract.
Magnesium alloy is the lightest mental material available for industrial application now, and has many good mechanical properties.
Experimental Materials and Methods Mg-8.9wt%Al-0.53wt%Zn alloy (AZ80) and Mg-3.2wt%Al-1.11wt%Zn alloy (AZ31) ingots are adopted as the materials for experiment.
Acknowledgements The present research is supported by the National Natural Science Foundation of China (Grant No. 50735005, No.50605059), Natural Science Foundation for Young Scientists of Shanxi Province, China (Grant No.2007021026), and Natural Science Foundation of North University of China.
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