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For brittle materials without joints, numerical studies have been implemented by a number of researchers using various numerical codes and models to simulate the processes of fracturing and fragmentation under blasting [7-19].
For each material, we design one sub-grid, thus, for the model shown in Fig. 1, there are two sub-grids for the materials of rock and TNT, and each sub-grid is discretized into a set of rectangular elements.
Rock Material Model.
Acknowledgements This work has been funded by the National Natural Science Foundation of China, Grant No. 51074109, and the Major State Basic Research Project, Grant No. 2010CB732005.
Xie: Journal of Sichuan University Vol. 40 (2008), p. 13-21 (in Chinese)

The conditions of outdoor damage process on materials can be reproduced in a controlled environment at laboratory level.
It is possible to notice a loss of mass after 30 day of exposure and then the materials seems to be stable.
Some of the most easily observed changes are partial strength loss and loss in material density over time (Mass per unit area).
Jing-rong, Journal of Hydrodynamics, 23 (6):820-825, (2011) [3] N.
P.Sangam, Geotextiles and Geomembranes, 20, 77-95, (2002) [15] ASTM (1994), Annual Books of ASTM Standards, American Society Testing and Materials, Philadelphia, Pennsylvania.

The difference between them consists in the number of material parameters needed as input data (four, six, seven and eight different parameters, respectively).
The integer exponent k depends on the crystallographic microstructure of the material: for BCC alloys and for FCC alloys.
Table 2 lists the biaxial material characteristics.
Akbarzadeh, An experimental and theoretical study on the prediction of forming limit diagrams using new BBC yield criteria and M–K analysis, Computational Materials Science 44 (2009) 1272-1280 [9] D.
Kuwabara, Advances in anisotropy and formability, International Journal of Material Forming 3 (2010) 165-189

Hydroxyapatite (HA) is a bioactive material that can provide good osteointegration and rapid bonding with the adjacent hard tissue [2].
Ti–6Al–4V is also well known for their potential as superplastic materials for applications in different areas including the aerospace, transportation and biomedical fields.
Superplastic materials are polycrystalline solids which have the ability to undergo large strains prior to failure.
Doremus: Journal of Biomedical Material Research Vol. 18 (1984), p. 719
Dahotre: Materials Science and Engineering R Vol. 66 (2009), p. 1

Nano-materials have been titled the most promising materials in 21 century by scientists.
In recent years, much attention has been paid to the applications of nano-materials in civil engineering, because nano-particles have many special properties such as huge specific surface area and high activity due to their small size.
Experiment Materials and mixture proportions The cement is P.O42.5.
Construction and Building Materials, 11(7-8)(1997), p383
Journal of Colloid and Interface Science, 211(1999), p39

Hasenclever, "Evolution of micro‑chemistry during solidification and homogenisation of AA3xxx aluminium–manganese alloys," Materials Science and Technology, vol. 37, no. 10, pp. 893–908, 2021
Pogatscher, "Making sustainable aluminum by recycling scrap: The science of 'dirty' alloys," Progress in Materials Science, vol. 128, art. 100947, 2022
Gottstein, "Thermodynamics based modelling of the precipitation kinetics in commercial aluminium alloys," Computational Materials Science, vol. 81, pp. 410–417, Jan. 2014, doi: 10.1016/j.commatsci.2013.08.049
Fischer, "Modelling of kinetics in multicomponent multi‑phase systems with spherical precipitates II: Numerical solution and application," Materials Science and Engineering A, vol. 385, no. 1–2, pp. 157–165, 2004, doi:10.1016/j.msea.2004.06.016
Yan, "A model for precipitation kinetics and strengthening in Al–Cu–Mg alloys," Materials Science and Engineering A, vol. 472, pp. 66–74, 2008

Most of the common used LED materials are smaller than this energy gap.
GaAs is the main material for making red LED.
Its material characteristic has often been studied.
Hiramatsu,“Photoluminescence of Mg-doped p-type GaN and electroluminescence of GaN p-n junction LED” , Journal of Luminescence, (1991) 666-670
Macrander, Materials Aspects of GaAs and InP based Structures, Prentice Hall, Englewood Cliffs, N.J., (1991).

Statistical Analysis of the Development Tragedy of Low Carbon Economy of Hi-tech Industry in Shandong Province Zhiqin Huang1, a, Wei Wang2,b and Ting Yan3,c 1School of mathematical sciences, University of Jinan, Jinan, 250022, China 2 Educational department, Moscow university, Moscow, Russia 3 School of Political Science and Public Administration, Shandong University, 250100, P.R.
The government should enact Journal Circulation Economic Law, Energy Saving Law according to the actual facts of Shandong province enterprises.
As we all know, carbon emissions are mainly from the burning of fossil raw materials.
Increase investment in science and technology, and actively research and develop carbon-capture and sequestration technologies, alternative technologies, reduction technology, recycling technology, energy technology, biotechnology, new material technology, green consumer technology, ecological restoration techniques.
Factors influencing the strength of carbon emissions, Shanghai analysis [J], Environmental Sciences,2011(1):20-26 [7] Carbon Dioxide Information Analysis Center.

In addition, the territory of Indonesia which is rich in coal mining materials makes Indonesia have a large enough coal reserves to reach 37 billion tons.
FABA is widely processed by using it as a substitute for raw materials such as concrete and bricks.
Materials and Equipment Materials used in this study are fly ash, cocopeat, guano, molasses, and bacteria (Pseudomonas. aeruginosa and isolated bacteria community).
The N element contained in fly ash is also small so that it is necessary to add other materials that can increase the content of N elements in the planting medium.
Kurniawati dan Priyadi, “Pengaruh Aplikasi Abu Terbang dan Pupuk Kotoran Sapi terhadap Populasi Mikroorganisme di Tanah Ultisol,” Journal of Applied Agricultural Sciences, vol. 5, pp. 41-49, 2021

(a) Liftoff curve of internal defects’ normal component (b) Liftoff curve of external defects’ normal component Fig.2 Simulation of Liftoff Characteristic Curve of Vnpp(z) Value Fitting Existing theory of MFL testing holds that magnetic conductivity of material in the range of pipe wall thickness is approximate to the magnetic conductivity of air when the steel pipe is magnetized to saturation.
Journal of Mechanical Engineering, 1994, 30: 191-197
Journal of Mechanical Engineering, 2009, 45(1): 309-314
[4] Li Jiuzheng Kang Yihua Sun Yanhua et al, Discrimination of internal and external steel pipe notches using signal figures extremum, Journal of Huazhong University of Science and Technology (Nature Science Edition), 2008 36(12):75-78
[8] Song Kai, Kang Yihua, Sun Yanhua et al, Study of Signal Mechanism Based on Combining Magnetic Flux Leakage and Eddy Current Testing, Journal of Mechanical Engineering, 2009, 145(7):233-237