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FLAC3D provides 11 kinds of simulation material constitutive model, which are used to simulate different material properties.
Among them, Mohr-Coulomb model [9] is mainly used in the simulation of granular materials, such as soil, rock, and concrete, etc.
Mohr-Coulomb model is used in the paper as the material constitutive model.
Acknowledgments The reported research was partially supported by National Natural Science Foundation of China with grant 51278313, Liaoning Natural Science Foundation with grant 201202180, Science Foundation of Liaoning Education Department with grant L2012214, and Liaoning Structure Engineering Key Laboratory Foundation with grant JG2009-08.
Wang: Journal of Geotechnical Engineering Vol. 24 (2002), p. 343.

Carbon nanotube is a new type of nanoscale materials, which has excellent adsorption property and electrical conductivity.
Carbon nanotube which found by the Japanese scientist LiJima in 1991, is a new type of nanoscale materials [3].
Experimental Materials Raw materials: silk fabric (Beibei cloth market, Chongqing, China), carbon nanotube (Shenzhen nano harbour Corporation Ltd).
[4] Yanrong Zhang: Information science and technology of China.
[6] Yudong Xin, Xiaodong Liu: Journal of donghua university of science and technology.

At the beginning, analysis of the damping properties of structural materials was carried out.
Structural materials were chosen because of them the boring bar body has to be manufactured.
As a comparison materials Steel 45 and Steel 40Cr were selected.
Zlotnikov, Optimization of cutting parameters for machining time in turning process IOP Conference Series Materials Science and Engineering 327 (4) (2018) 42069
Matveev, Vibration-Absorbing properties of structural materials, Kiev, 1971

With the rapid development of LED, thermal performance of traditional plate is not in conformity with the requirements, so people use Al2O3 as heat sink materials[5].But the sintering temperature of pure Al2O3 is so higher, resulting in the abnormal grain growth, effect the mechanical properties of the material[6].
Stoichiometric ratios of Al2O3: SiO2: Li2CO3 = 99.2%: 0.4%: 0.4%, This three raw materials were mixed and placed in a ball mill was ball milled for 4 hours, drying.
By the quantum theory, Quantization of lattice vibration energy is called phonon[17, 18], Al2O3 ceramics materials mainly rely on phonon to achieve the purpose of the thermal conductivity.
(New York: Wiley) p189 [17] Chao Wang, Chaoqun Peng, RChu Peng, Kun Yu, Chao Li 2007 The Chinese Journal of Nonferrous Metal. 17 1229 (In Chinese) [18] Zhijun Zhang, Fuming Xu, Yi Tan 2009 Materials Review.23 56 (In Chinese) [19] Charles Kettle. 2004 Introduction to solid state physics(1st Ed.)
(New York:Wily) p327 [20] Qisheng Wu, Anlan Cai, Yaqun Yang 2006 Physical Properties of Materials (Vol.1) (Shanghai: East China university of science and technology press) p81 (In Chinese) [21] Alshaikhi A, Srivastava G P 2007 Diamond Relat Mater 16 1413

The hardfacing process normally uses materials consisting of a metallic matrix material and hard particles as reinforcement.
These materials exhibit a high resistance to temperature.
Meskinis, Influence of Plasma Transferred Arc Process Parameters on Structure and Mechanical Properties of Wear Resistive NiCrBSi-WC/Co Coatings, Materials Science 17 (2011) 140-144
Kempulraj, A novel procedure for fabrication of wear-resistant bushes for high-temperature application, Journal of Materials Processing Technology 141 (2003) 60-66
Alves Albuquerque Rosa, Influence of oscillation parameters on crack formation in automatic Fe-B hardfacing, Journal of Materials Processing Technology 65 (1997) 272-280

Table 1 Material parameters for AA 5182-O [10].
Hayat, Improving profile accuracy in SPIF through statistical optimization of forming parameters, Journal of Mechanical Science and Technology, 25 (2010), 77-82
Hartley, An assessment of various process strategies for improving precision in single point incremental forming, International Journal of Material Forming, (2010) DOI 10.1007/s12289-010-1004-9
Van Houtte, Small-scale Finite Element Modelling of the Plastic Deformation Zone in the Incremental Forming, International Journal of Material Forming, 1 (2008) 1159-1162
Van Houtte, MK modelling of sheet formability in the incremental sheet forming process, taking into account through-thickness shear, International Journal of Material Forming, 2 (2009) 370-382

There is a strong rivalry between well-known materials such as aluminum, steel and plastic, however technical progress features new materials such as carbon fiber laminates (CFK).
The Minerals, Metals & Materials Society.
Journal of Materials Processing Technology 148.
Journal of Materials Processing Technology 162–163.
[11] A Penlington et al, Materials Science Forum 794-796, (2014), 605-610

The resulting materials can be attributed to mesoporous adsorbents.
Many materials are used as adsorbents in industry, among which the main ones are carbon-based materials [2-3] and insoluble silicates.
Nanocrystalline materials are called with the size of crystals (grains or particles) less than 100 nm [7-11].
Diamond and Related Materials. 2017 Jun 1;76:14-20
Nanostructured materials.

The study lays the foundation for the further design of high-performance electromagnetic wave absorbing materials.
Dong:Electromagnetic wave shielding and absorbing materials (Chemical Industry Press, Beijing2007), p.20-40 (In Chinese)
[5] W.J.Hao: Science and technology of foreign building materials Vol.25 (2004), p.74-76(In Chinese)
Guo: Journal of Functional Polymers Vol.24 (2011), p.353-358 (In Chinese)
Zhu: Materials Review Vol.24 (2010),p. 9-11(In Chinese).

Introduction Sound signals having different eigenvalues will be produced when high pressure water-jet impact the target with different materials and geometry parameters.
Optimization of distance between the nozzle and the target material.
Acknowledgement This work was financially supported by the Natural Science Foundation of China (Grant No. 51075002).
Journal of Anhui University of Science and Technology (Natural Science) .
Journal of Lanzhou Jiao Tong University .