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To prepare materials for sheetmetal unfolded based on CATIA software became an important link in processing and forming of sheetmetal parts.
Similarly if it is 0.8, it means that the position of neutral layer lies in the place of 80 percent of thickness of sheetmetal materials.
With the development and popularization of digital technology in aircraft manufacturing enterprises, in terms of prepare for raw materials in the process of aerospace sheetmetal forming, factor K can make changes according to the actual materials, extensibility based on CATIA software.
Van Tyne, Analytical model for prediction of sidewall curl during stretch-bend sheet metal forming, International Journal of Mechanical Sciences, Vol. 50(4)(2008), pp. 666–675
Somasundaram, A mathematical model for bend-allowance calculation in automated sheet-metal bending, Journal of Materials Processing Technology, Vol. 39(3–4)(1993), pp. 337–356

Recently, with the emergence of new multifunctional materials, the research objectives are expanded to fiber, composite and stepwise graded materials [4].
The three type of mass density materials are recorded as 1, 2 and 3 respectively.
Advanced engineering Materials 2008;10(9):775-787
Journal of materials science 2005;40:3475-3480
International Journal of Engineering Science 1978;16(1):1–99

However, the huge amount of the building materials for constructing these stadiums and facilities cannot be endlessly obtained directly from nature, so the developer would lumber in a destructive manner and destroys the original ecosystem.
Journal of Jianghan University (Natural Sciences),Vol.38, No. 3(2010),pp.106-109
Journal of PLA Institute of Physical Education, Vol. 26, No.1(2007),pp.5-7
Journal of Shanghai Sports Institute, Vol.30, No. 1(2006),pp.3-4, in Chinese
Journal of Physical Education, Vol. 11, No. 3(2004),pp.22-24, in Chinese.

Journal of Minerals & Materials Characterization & Engineering 2010, Vol. 9, No.8, pp.709-739
Technology and research developments in powder mixed electric discharge machining (PMEDM), Journal of Materials Processing Technology 2007, Volume 184, Issues 1-3, 12, Pages 32-41
International Journal of Applied Science and Engineering (IJASE).
Journal of Engineering science and Technology review (Accepted for publication-In press) [22] K.
Journal of Minerals & Materials Characterization & Engineering, Vol. 9, No.8, pp.709-739

In order to overcome these shortages of cement, limestone powder and fly ash are regarded as mixed materials and with clinker to form tri-cementitious materials.
The particle size distributions of these materials are shown in Table 1.
It means that the ratio of mixed materials should be appropriate.
Fig. 3 Effect of dosages of mixed materials on flexural strength Fig. 4 Effect of dosages of mixed materials on compressive strength Increasing of dosages of mixed materials will decrease flexural strength and compressive strength.
[4] Lu Shenming, Jiang Yuechuan, Journal of Zhengzhou University (Natural Science), 29, No.4 (2008) 86 (in Chinese)

In thermal model, all materials are treated as heat conduction material.
Journal of China University of Petroleum(Edition of Natural Science), 2006,30(5):53-56.
Journal of China University of Petroleum(Edition of Natural Science), 2008,32(1):86-89.
Journal of China University of Petroleum(Edition of Natural Science), 2006,30(4):94-97.
A mechanical model for predicting casing creep load in high temperature wells, Journal of Natural Gas Science and Engineering, 2011,(3):53-55

Fractural research on Ti2AlC/TiAl compound materials Yang Li1,a, Yunlong Yue1,b*, Haitao Zhang2,c and Ming Wen1,d, 1 School of Materials Science and Engineering, University of Jinan, 250022 P.R.
With the materials science development, more and more methods have been developed to research the mechanical properties.
In all of these methods, the computer simulation has become one of the most important components of saluting the practical problems in materials science [4].
Suganuma: Journal of Alloys and Compounds.
Zabaras: Computational Materials Science.

Methodology The research questions are: 1.What is the main categories of Nano materials in advanced materials and manufacturing sciences?
Three dimension Nano materials [10] Zero dimension Nano materials.
Challenges regarding manufacturing and process of advanced materials in developing countries Weakness of manufacturing sciences.
Moradchelleh: Problems and Tendencies of the Development of the Architectural Sciences: Culture Research Aspect, Middle-East Journal of Scientific Research, 10 (6): 677-682, (2011)
Renewable energy in Iran:Challenges and opportunities for sustainable development, journal of Environmental Science & Technology, Vol. 1; 2004, p. 69- 80.

The spring angles for these materials are minimal in comparison with other materials.
Yoshida, Flexible punching method using an elastic tool instead of a metal punch, Journal of Materials Processing Technology. 137 (2003) 151–155
Akdemir, Computer aided modelling of flexible forming process, Journal of Materials Processing Technology. 148 (2004) 376–381 [9] M.
Bartnicki, Analysis of rubber forming process of fire barrier from titanium CP2 alloy for AW 139 helicopter, Advances in Science and Technology Research Journal. 9 (26) (2015) 66-71
Ahmad, Computer aided modelling of friction in rubber-pad forming process, Journal of Materials Processing Technology. 209 (2009) 4925–4934

Samuel, "Production of Al-(12-25) wt% Si Alloys By Rapid Solidification: Melt Spinning Versus Centrifugal Atomization," Journal of Materials Science, vol. 27, pp. 3539-3551, 1992
Marino, "Structure and Stability of Rapidly Solidified Al-Si base Alloys," Journal of Materials Science Letters, vol. 5, pp. 586-588, 1986
Zalm, "Structural Inhomogeneties of AlSi Alloys Repidly Quenched from the Melt," Journal of Materials Science, vol. 17, pp. 2887-2894, 1982
Mahanti, "Characterizationof Rapidly Solidified Structures of Al-6Fe-3MM," Journal of Materials Science, vol. 26, pp. 4369-4374, 1991
Jones, "Structure and Properties of Rapidly Solidified Al Rich Al-Mn-si Alloys," Journal of Materials Science, vol. 34, pp. 735-747, 1999.