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At the present time, the most widespread approach to the description of geological materials is based on the usage of internal variables.
Using this model enables deriving constitutive equations for a wide range of geological materials with various structures (rocks, loose materials, soils and etc.) [13,14].
Evaluating the residual life of salt pillars // Journal of Mining Science. 1998. – vol. 34. - Issue 1. – p. 14-20
Stability assessment of interchamber pillars // Journal of Mining Science. 1997. – vol. 33. - Issue 1. – p. 23-30
Discrete element modeling of rock failure dynamics // Journal of Mining Science. 2012. – vol. 48. - Issue 1. – p. 96-102

Materials and Method Material.
Yigitoglu: Journal of Islamic Academy of Sciences, 5 (2) (1992), p. 100-106
Seeyangnok: Key Engineering Materials, 803 (2019), p. 351-355
Felten: Food Materials Science: Effects of Polyphenols on Sucrose Crystallization and Characterization and Creation of Alternative Salts of Thiamine. 2019
Qi: Construction and Building Materials, 214 (2019), p. 399-412.

Materials and Methods Materials: The materials consisted of sawdust, river sand, Ordinary Portland cement and water.
Udoeyo F.F and P.U Dashibil, Sawdust ash as concrete material, Journal of Materials in Civil Engineering, 10.1061/(ASCE)0899-1561(2002)14:2(173) Pp 173-176
Oparade , Potential use of wood waste ash as additive in concrete material, Journal of Materials in Civil Engineering. 10.1061/(ASCE)0899-1561(2006)18:4(605), Pp 605-611
The Arabian Journal of Science and Engineering, 31(1C) (2006), Pp 231-239
Olutoge, Investigations on sawdust and palm kernel shells as aggregates replacement, ARPN Journal of Engineering and Applied Sciences, 5(4) (2010).

Kablov, Materials and chemical technologies for aviation technology, Bulletin of the Russian Academy of Sciences. 82 (6) (2012) 520-530
Kim, Raw materials → composites → carbon fiber, The Chemical Journal. (2014) 64-73
Lukina, Problems and prospects of the implementation of the policy of import substitution in the formation of industrial cooperation on the use of composite materials in the domestic civil aircraft industry on the example of JSC United Aircraft Corporation, Engineering Journal: Science and Innovations. 11 (2014) pp 1-12.
Burlov, Technology of polymer materials, Profession, SPb, (2008) 534
Zlobina, The effect of processing in a SHF electromagnetic field on the parameters of vibro-wave processes generated by the impact of a solid body in cured polymer composite materials under influence of climate factors, Journal of Physics: Conference Series. 1515 (2020) 42045

Tan: Fluid-Pressure-Assisted Deep Drawing, Journal of Materials Processing Technology, vol. 192–193 (2007) pp. 8-12
Estrin: Size Effects in Micro Cup Drawing, Materials Science and Engineering: A, vol. 550 (2012) pp. 312-319
Jiang: A Multi-Region Model for Numerical Simulation of Micro Bulk Forming, Journal of Materials Processing Technology, vol. 212 (2012) pp. 678-684
Geers: Size Effects from Grain Statistics in Ultra-Thin Metal Sheets, Journal of Materials Processing Tech, vol. 174 (2006) pp. 233-238
Lu: Study of Thickness and Grain Size Effects on Material Behavior in Micro-Forming, Journal of Materials Processing Technology, vol. 201 (2008) pp. 237-241

A strong pulse electromagnetic field was employed to treat the surface layer of several metal materials.
In present work, the PEF has been employed to treat the surface layer of several metal materials.
Vol.30 (1990), p. 27 [4] Gao Ming, He Guanhu, Yang Fei, Guo Jingdong, Yuan Zhengxing, Zhou Benlian: Materials Science & Engineering A Vol.337/1-2 (2002),p.110 [5] Zhou Yizhou, Zhou Benlian, Guo Xiaonan, He Guanhu, Zhang Futian: Chinese journal of material research Vol.14 (2000), p. 29 [6] K.
Conrad: Materials Science and Engineering.
Vol.13 (1999), p. 73 [8]Xiao Suhong, Guo Jingdong, Li Shouxin : Chinese Journal of Materials Research.

Introduction According to recent reports[1,2], the increased demand for raw materials increased nearly 70%, took up 30%-80% of the manufacturing costs from 2001 to 2008, nevertheless, the demand for many of these raw materials will treble by 2030.
Production process is the whole process of transforming raw materials into qualified products, can also be seen as a resource-environment input -output processes.
Advanced Materials Research, Vol. 223(2011), p. 212-221
Journal of Cleaner Production, Vol.13 (2005), p.1-17
Modern Machinery Science Journal, Vol. 3(2009), p. 62-67.

Castor oil is one kind of chemical raw materials irreplaceable and was widely used in chemical, energy sources, medicine areas and so on.
So, the TS of the wood based panel are decided by resin kind, resin additive amount, materials kind and the size of the materials.
type and the size of materials.
JOURNAL OF ZHE JIANG UNIVERSITY (MEDICAL SCIENCES) , 2005, Vol. 34(3), p. 217-219
Journal of southwest forestry college，2009，Vol.29(4), p.54-58

Conclusions 1) cold-rolled composite, 30% to 50% reduction rate can be achieved leather materials A4045 and the core material A3003 solid early combination.
Trend of weight reduction of automobile and expectation for aluminum alloys as light weight materials[J].
Materials Science Forum, 2003, 439(4)：221-226
Journal of Materials Processing Technology, 2007, 187-188(12)：533-536
Journal of Northeastern University:Natural Science, 2004, 25(9)：840-843

The technique invokes high costs in term of energy, manpower, and materials and is inefficient.
This is a major obstacle to the development of new or improved materials.
[5] D A Woodford．Test methods for accelerated development design and life assessment of high-temperature materials．Materials & Design，Vol. 14 (1993)No.4,pp.231-242
[9] S C Bose，Singh Kulvir，J Swaminathan，et al．Prediction of creep life of X10CrMoVNbN-91(P-91) steel through short term stress relaxation test methodology．Materials Science and Technology， Vol. 20(2004)No.5, pp.1290-1296
[10]S Osgerby，B F Dyson．Performance of Bolting Materials in High Temperature Plant Applications(London,UK,1995). pp.362-373．