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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

BPS 1303,Itajubá,MG,Brasil amvgelfuso@unifei.edu.br, bgml.mec@gmail.com,cielthom@gmail.com Keywords: CCTO, microwave, raw materials.
Ramirez: Science Vol. 293 (2001), p. 673. ].
Castro: Materials Research Vol. 11 (2008), p. 85
CCTO-S: The commercially available Ca(OH)2 (Vetec – 99%), CuSO4 (Vetec – 98%) and TiO2 (Sigma-Aldrich – 99.5%) were used as raw materials.
Sombra: J. of Materials Science: Materials in Electronics Vol. 20 (2008), p. 163. ] studied the synthesis of CCTO using Ca(OH)2, TiO2 and CuO as raw materials, produced by microwave irradiation, conventional calcination and mechanical milling.

Research on High Ductility Cementitious Composites Improved by Water-soluble Polymer and Micro-fibers LiPing Guo1, 2, *, WenXiao Zhang1, Bo Chen3, LiHui Zhang1, LinHong Jin1 1School of Materials Science & Engineering, Southeast University, Nanjing 211189, China 2Jiangsu Key Laboratory of Construction Materials, Nanjing 211189, China 3Materials & Structural Engineering Department, Nanjing Hydraulic Research Institute aguoliping691@163.com Key words: High Ductility; Cementitious Materials; Water-soluble Polymer Latex; Micro-fibers Abstract.
At the same time, it can improve materials’ durability [1-2].
Which shows that rubber powder mixed directly into cement-based materials can improve the cement-based material’s toughness.
Conclusions 1) Mixed with all kinds of polymer, toughness of cement-based materials are improved.
Journal of Materials Science &Engineering,2008,02:264-267（in Chinese） [7] LI Zhulong, LIANG Naixing, The Effect of Adding Styrene-Butadiene Latex on the Rigidity and Wearability of Mortar and Concrete [J].

This method partly improves the electrical and other performance of Ag/SnO2 materials.
Electrical Engineering Materials, Vol.20-4(1999),p.1
[5]Liu Jun.Development and application of silver metal oxide electrical contact materials[J].
[6]Du Yan,Zhang Kun-hua,Zhou Xiao-long,etc.Study on electrical properties of AgSnO2 Contact Material by Reaction Synthesis.Journal of Kunming University of Science and Technology(Natural Science Edition), Vol.30,No.4,(2005),p.28-p.31
[7]Huang Xiwen.Discussion on the conductivity of electrical contact materials[J].

Decision matrix for insulting materials No.
Materials and Design Vol.27 (2006), p. 329-337
A target-based normalization technique for materials selection.Materials & Design Vol. 35 (2012), p.647-654 [18] K.
Materials & Design, Vol. 30 (2009), p.687-697
Materials & Design, Vol. 32 (2011), p.851-860

The influence of the degree of homogeneity of the SiO2 sol on the duration of the induction period and the quality of fire-resistant coatings on textile materials was studied.
The fire resistance of textile materials is affected, first of all, by the quality of applying a fire-resistant coating to them.
However, the use of such sols for tissue impregnation is undesirable, because it leads to partial destruction of the threads and loss of strength characteristics of textile materials.
Phytic acid/silica organic-inorganic hybrid sol system: a novel and durable flame retardant approach for wool fabric, Journal of Materials Research and Technology. 9 (1) (2020) 700-708
Halayda, Study Of The Chemical Activity Of SiO2 Hybrid Gels-Precursors Of Functional Materials, Problems of Emergency Situations.

Material and Methods Work and Tool Materials.
Journal of Materials Processing Technology 116 (2001) 244-251
Advances in Materials Science and Engineering 2016 (2016) 7372132
Materials Today: Proceedings 50 (2022) 2135-2142
Procedia Materials Science 6 (2014) 150-153.

Cheng: Research on High Power DC/DC converter Modular power supply (MS., Chinese Academy of Sciences, China 2006), p.28
Yu : Journal of Magnetic Materials and Devices, Vol. 43(2012) No. 2, p40
Zhao: The magnetic component in switching power supply (Liaoning science and Technology Press, China 2002)
Yang : Electronic Components ＆ Materials, Vol. 45(2011) No. 11, p61
Shi : Journal of Magnetic Materials and Devices, Vol. 41 (2010) No. 5, p70.

By this means, the mechanical properties of three common bolt materials were analyzed.
Introduction Different bolt material strain rate sensitivities are different like other metal materials.
These three materials are all belong to common bolt materials.
Li: Engineering structural antiknock dynamics(Shanghai Science and Technology Press, Shanghai 1989).
Journal of Sound and Vibration, Vol. 108 (1986) No.3, p. 455

Consider a beam made of functionally graded material which consists of a mixture of two materials V1 and V2.
Khair-Eldeen: Powder metallurgical fabrication and microstructural investigations of Aluminium/Steel functionally graded material,” Materials Sciences and Applications. 2 (2011), p. 1708-1718
Miura-Fujiwara: Novel fabrication method for functionally graded materials under centrifugal force: the centrifugal mixed-Powder method, Materials. 2 (2009), p. 2510-2525
Mishra: Functionally Graded Materials: A critical Review.
International journal of research. 1 (2014), p. 289-301