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This is because that a larger number of materials deforms during REA process.
Metallic materials crystallographic texture and anisotropy, Science Press, Beijing, 2002 [2] Y.
Metallurgical and Materials Transactions A, 2008, 39A, 642-658
Journal of Nanchang Hangkong University (Natural Science), 2009, 2, 16-19
Journal of Nanchang Hangkong University (Natural Science), 2004, 2, 6-9

One of the significant advantages of functionally graded materials (FGMs) over conventional materials is the elimination of the interface issues related to typical composite materials.
The effect of longitudinal inhomogeneity parameter on the transverse displacement of functionally graded materials beam is plotted in Figure 3.
Journal of Mechanical Science and Technology 35 (2021): 1099-1108. https://doi.org/10.1007/ s12206-021-0223-y [13] Zenkour, Ashraf M.
International journal of mechanical sciences 51.11-12 (2009): 869-880. https://doi.org/10.1016/j.ijmecsci.2009.09.026 [14] Talha, Mohammad, and B.N. 
Journal of Mechanical Science and Technology 30 (2016): 1253-1264. https://doi.org/10.1007/s12206-016-0229-z [18] Mahi, Amale, and Abdelouahed Tounsi.

Johnson-Cook's model is employed as the constitutive law for the workpiece material.
However, the machining process of metal cutting is quite complex, relating to physics, mechanics, elastic-plastic theory, metal material, thermology and superficial science (tribology) and so on.
Material Model.
Johnson-Cook model describes material yielding flow properties of the cutting region more exactly.
Mackerle: Journal of Materials.

Environmentally viable are those thermal insulation materials that are made from renewable resources.
Sjoberg, Flax and hemp fibres as raw materials for thermal insulations, Building and Environment (2008),43:1261–1269
Kizinievič, The Peculiarities of Hardening of Composite Anhydrite Cement Pozzolanna Binding Material with not Burned Natural Anhydrite, Materials science (medžiagotyra) (2011)16:159-164
European Journal of Environmental and Civil Engineering (2010), 14(5):545–560
Thermal Insulation Materials From Sapropel And Hemp Shives (Cannabis Sativa L.)

At present, there are some research institutions using polymer materials to fabricate CMUT and have made some progress.
Polymer materials have the characters of good elasticity, not easy to break and large dynamic range etc..
SU-8 has a smaller reflection coefficient than that of other materials, and the acceptance rate is much higher, so it is an ideal material for capacitive acoustic transducers.
Journal of Tianjin University, 2008, 41(1):17-20
Journal of Aerospace Engineering，2003,16(2):76-84

Joining of Cf/SiC Ceramic Matrix Composite Using SiC-Si3N4 Preceramic Polymer Hongli Liu 1,a, Shujie Li1,b and Zhijun Chen 2,c 1 School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, P.
Zhang: Rare Metal Materials and Engineering Vol.33 No.1 (2004), p.101 [3] J.
Woltersdorf: Journal of Materials Science Vol.33 (1998), p.2405 [6] P.
Scarinci: Jounal of Nuclear Materials Vol.278 (2000), p.127 [7] H.
Song: Chinese Journal of Materials Research Vol.12 No.1 (1998), p.64

He made use of the elastic energy and chemical to remove materials [2].
In the current study, the author conducted the electrochemical finishing with four types of completely inserting electrode for several die materials after thread cutting.
The materials of workpiece are AISI H13 (SKD61), AISI D2 (SKD11), AISI P21 (NAK80), and AISI 4340 (SNCM439).
Pa: Electropolishing of Cylindrical Workpiece of Tool Materials Using Disc-Form Electrodes (Journal Materials Processing Technology, Vol.142, 2003), pp.203-212
Hocheng: Using Borer-Shape Electrode in Electrochemical Smoothing of Holes (Materials Science Forum, Vol.505-507, 2006), pp.793-798

The article is devoted to the modes of getting copper powder materials by the method of electroerosion dispersion from waste of an electrotechnical copper wire of an aquatic environment.
The system includes a reactor of electroerosion dispersion for putting conducting materials, a voltage regulator and a pulse generator.
[4] Uglov V.V., Kuleshov A.K., Remnev G.E. // Russian Journal of Non-Ferrous Metals. 2013.
[5] Valentov A.V., Konovodov V.V., Agafonova E.V. // Applied Mechanics and Materials. 2013.
[6] Ageeva E.V. // Journal of nano- and electronic physics. 2013.

Zhao et al. [5] presented a similar model assuming elastic materials for soft-pad grinding of silicon wafers to simulate the actual contact of the grinding wheel on the work-piece.
Fracture mechanics is the field of mechanics concerned with the study of the propagation of cracks in materials.
Most engineering materials show some nonlinear elastic and inelastic behavior under operating conditions that conflict with the assumption of linear elastic fracture mechanics.
The brittle cracking constitutive model provided in Abaqus is applicable to all brittle materials whose compressive and pre-cracking tensile behavior can be represented through linear elasticity, such as ceramics and concrete.
Shin: Journal of Manufacturing Science and Engineering Vol. 129(2) (2006), p. 287–295 [4] T.

With the progress of science and technology, people's desire to improve the work efficiency became stronger and stronger.
The two long sides are made by elastic materials.
Table.1 The parameters of the components Name Material Young modulus （MPa） Poisson ratio Density (t/mm3) Cross the skeleton aluminum 7000 0.300 2.702E-09 Center-wire carbon structural steel（Q235） 205000 0.290 7.858E-09 Wire alloy steel （65Mn） 210000 0.288 7.820E-09 The simulation model is as shown in the figure.7.
References [1] Tian, S.B., Qiu, L.C., Qin, J.W., and Liu, C.F., Comparison research on the picking robot’s manipulator structure, Journal of Agricultural Mechanization Research, 2007, 3:195-197
[2] Liu, X.D., Ma, L.Z., and Chen, X.X., The pneumatic flexible joint security design for the picking robot’s actuator, Journal of Agricultural Machinery, 2008, 8:105-108 [3] Wang, F.Y., Liu, J.Z. and Li, P.P., Research status and prospect of the picking robot’s terminal actuator, Journal of Agricultural Mechanization Research, 2011, 11:10-14