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Progress in Materials Science, 46(6), 559-632, 2001 [3] MG Rashed, M Ashraf, RAW Mines, PJ Hazell.
Biological Materials Science: Biological Materials, Bioinspired Materials, and Biomaterials.
Progress in Materials Science, 74, 332400, 2015 [9] OB Olurin, NA Fleck, MF Ashby.
Materials Science and Engineering: A, 291(1), 136-146, 2000 [10] EW Andrews, LJ Gibson.
Journal of Materials Science, 35(24), 6259-6266, 2000 [17] P Fratzl, HS Gupta, FD Fischer, O Kolednik.

Usually, Titanium and Aluminium stacked materials are drilled before aircraft assembly and this poses a major challenge in machining due to the different machinability of materials.
Journal of Materials Processing Technology, 259:270-281, September 2018
Applied Sciences, 10:845, January 2020
Applied Science and Manufacturing, 2019
Modeling thread milling forces in mini-hole in dental metallic materials.

The New Materials Institute of Shandong Academy of Sciences [17] has successfully developed V-Ti black ceramics hollow solar panels in small size.
With unique structure and property, the rare-earth vanadate materials are extensively applied as optical materials, laser materials, magneto-optical materials, dielectric materials, magneto-resistive materials, adsorbing materials, catalysts and chemical sensors.
VC wear-resistant materials.
Nano-vanadium materials.
[21] Jiaqiang Xu, Hailin Zhang, Chao Li, Xiaona Chen, Shengli Zhang: Journal of Zhengzhou University of Light Industry(Natural Science), Vol, 22(1), (2007), p. 5.

Chinese Science Bulletin Vol. 53(2008), p. 784-790
Wood and other raw materials for the 21st century.
Forest Products Journal Vol. 45(1995), p. 17
The family of wood composite materials.
Forest Products Journal Vol. 46(1996), p. 18-19.

Wu: Materials and Design.
Xiao: Materials Review.
Zhu: Materials Science and Engineering A.
Yamanaka: Materials Letters.
Wu: Materials Science and Engineering A.

Introduce Friction stir welding (FSW) is a solid-state technique used for joining materials.
Acknowledgements This work was financially supported by National Natural Science Foundation of China (50875119) and Jiangxi Natural Science Fund (2008GQC0039).
K: Welding journal Vol. 7 (1999), p. 229 [2] F.Beckmann, T.Donath: Metals & Materials Society 2003 [3] KE Li-ming, PAN Ji-luan, XING Li: Journal of Mechanical Engineering, vol.45 (2009),p.89 (in chinese) [4] M.
Mcclure: Materials Characterization Vol. 49 (2003), p.95 [5] Olivier Lorraina, éronique Favierb, Hamid Zahrounic: Journal of Materials Processing Technology, vol. (2010) ,p.63 [6] B.C.
Webb: Journal of Materials Processing Technology vol.184,(2007), p.240

Composite materials based on natural polysaccharides and polyguanidines are considered.
Yang, Antibacterial action of chitosan and carboxymethylated chitosan / // Journal of Applied Polymer Science. 79 (2001) 1324-1335
Xiao, Preparation of Guanidine Polymer and Its Complex as Dual-Functional Agent for Cellulose Fibre-Based Hygiene Products, Journal of Biobased Materials and Bioenergy. 5 (2011) 219-224
Khashirova, Acrylate and methacrylate guanidine-ionic liquids for dissolution of cellulose, Materials Science Forum. 935 (2018) 45-48
Khashirova, Spectrophotometric study of complex compounds of polyacrylate and polymethacrylate of guanidine, and also of composites on their basis with Fe (II) ions, Materials Science Forum. 935 (2018) 1-4.

As shown in Fig.1, the side length of the 0.1 kg cubic concentrated explosive charge is 0.04 m, with its mesh size 5 mm, and as the blasting center distance increases, the mesh has a very sparse gradient coefficient of two. 73926 nodes and 68688 elements were created in total, and all the materials were divided into Eulerian meshes, which allows multiple materials in one element.
In an Euler solver, the numerical mesh remains undeformed, while several kinds of materials are allowed to flow freely from one element to another.
This solver is suitable for modeling fluid phase materials, such as gas or liquid.
International Journal of Rock Mechanics & Mining Sciences. 44(2007)730–738 [3] Yang Xiumin, Jin Yiliang, Liu Dianzhong.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS.

These materials are assembled by fusion with an energy source.
Schulte, Functionally graded materials for biomedical applications, Materials Science and Engineering: A, 362-1 (2003) 40-60
Riedel, Processing techniques for functionally graded materials, Materials Science and Engineering: A, 362-1 (2003) 81-106
Nath, Direct laser cladding of Co on Ti-6Al-4V with a compositionally graded interface, Journal of Materials Processing Technology, 209-5 (2009) 2237-2243
Dutta, Process-planning for layered manufacturing of heterogeneous objects using direct metal deposition, Journal of Computing and Information Science in Engineering, 2-4 (2002) 330-344

However, in model test, correctly selecting model materials is the key to correctly simulate the prototype.[2] Currently, in consideration of few researches on similar materials of soft rock tunnel model test, and the problems such as high price of raw material, difficult availability of materials in market, and weak universality existing in the materials which can be used as reference, it is necessary to research and develop the similar materials with low price, wide source, and strong universality.
Research and development of model materials 2.1 Moulding process After selection of raw materials of model materials, the moulding way is very critical.
References [1] He Manchao, Jing Haihe, Sun Xiaoming: Soft Rock Engineering Mechanics [M], Beijing: Science Press, 2002, 1-14
[2] Ma Fangping, Li Zhongkui, Luo Guangfu: Application of NIOS Model Materials in Geomechanics Similarity Model Test [J], Journal of Hydroelectric Engineering, 2004, 23 (1), 48-51
[3] Wang Hanpeng, Li Shucai et al.: Research and Making of Similar Materials of New Geomechanics Model Test [J], Journal of Rock Mechanics and Engineering, 2006, 25(9): 1842-1847