Search results

Establishment of micro aggregate model Inhomogeneity, discontinuity and discreteness of the concrete materials, randomness of material parameter distribution is one of the important factors affecting the concrete elastic modulus and strength.
In order to fully reflect the characteristics of concrete existence, from the micro level of construction materials, the random mechanical parameter of random aggregate model.
Random mechanical parameter In order to describe the heterogeneity of material properties of concrete, not only the distribution of aggregate particles should conform to the actual situation is random, the mechanical parameters of each materials should also have a certain randomness.
Chinese Journal of Theoretical and Applied Mechanics, 2005, 37(4)516-521.
Elastic-plastic-brittle constitutive model of rocks and its numerical validation [J].Journal of China Coal Society,2012,37(4):585-589.

Therefore, it is important to select suitable materials for the nozzle which can maintain its structural integrity at a high temperature and to evaluate these materials for proper rocket nozzle design [1].
Therefore, it is important to evaluate the mechanical properties of these materials for proper application.
Generally, graphite materials show higher strength at elevated temperatures in an anti-oxidation environment [2].
Ji: Journal of Nuclear Material Vol. 436(2013) , pp. 185-190 [5] Noel N.
Ji: Journal of the Korean Ceramic Society, Vol. (2010), pp. 439-444

With the support of various kind of hardware and software, and utilization of the theories of system engineering, information science and management science, construction transportation real-time monitoring system is built so that earth move vehicles can be overall monitored during dam material transporting process.
Engineering Journal of Wuhan University, 2000, 33(5): 16-18(in Chinese)
Journal of Construction Engineering and Management, 2004, 130(2): 216–224
Journal of Construction Engineering and Management, 2000, 126(3): 201-209
Journal of System Simulation, 2006, 18(Supplement 2): 976-981(in Chinese).

As a result, with reference to simulation results, changes in physical properties within the tested materials may be assessed.
However, a description of the anhysteretic magnetization of isotropic materials is different from anisotropic.
Kundracík, Journal of Magnetism and Magnetic Materials 162 (1996) 43–49
Dogaru-Ulieru, Journal of Materials Processing Technology 181 (2007) 172–176
Najgebauer, Materials Science and Engineering: B 131 (2006) 22–26

Fussy Assessment of Fatigue Strength of Spot-Welded Structures Yuxin Yao 1, a, Chunyuan Shi2,a 1 School of Civil and Safety Engineering, Dalian Jiaotong University, Dalian, 116028, China 2 School of Materials Science and Engineering, Dalian Jiaotong University, Dalian, 116028, China aiceberg2@.edu.cn Keywords: spot-welded.
The fatigue strength value of a spot-welded structure is the result of the co-action of the weld spot, material, loads, defects and environment [3-4].
Table 1 The calculation of weighing coefficients using DARE method Categories Sequential Influencing Factors Temporary importance coefficient Corrected importance coefficient Weighing coefficient Wi First level Materials 1 Material 1.5 4.5 0.45 2 Welding equipment 2 3 0.3 3 Welding technology 1.5 1.5 0.15 4 Others 1 0.1 Geometric characteristics 5 Size 1.2 1.8 0.4186 6 hem 1.5 1.5 0.3488 7 Design 1 0.2326 Load spectrum 8 Symmetric 1.5 1.8 0.45 9 Stochastic 1.2 1.2 0.3 10 fluctuation 1 0.25 Structure 11 Stress concentration 1.3 2.2464 0.2951 12 Surface treatment 1.2 1.726 0.2267 13 Force at the joint 1.2 1.44 0.1892 14 Follow-through force 1,2 1.2 0.1576 15 Static strength 1 0.1314 Notch stress 16 clearance 1.5 3.375 0.4154 17 Notch size 1.5 2.25 0.2769 18 Plate thickness 1.5 1.5 0.1846 19 Welding diameter 1 0.1231 Stress intensity factor 20 KⅢ 1.5 3.375 0.4154 21 KⅡ 1.5 2.25 0.2769 22 KⅠ 1.5 1.5 0.1846 23 Residual stress 1 0.1231 Second level Stress intensity
Journal of Beijing University of Technology, Vol. 30-2 (2004), p. 144 [4] Shang Deguang: Wang Ruijie.
Chinese Journal of Mechanical Engineering, Vol. 41-5 (2005), p. 49 [5] Wu Lin: Intelligentized welding Technology(Trans Tech Publications, China 2000).

Journal of Composite Materials 1986;20:520-538 [2].
Journal of Composite Materials 1997; 31:619-638 [3].
Journal of Composite Materials 2008; 42:1897-1919 [4].
Journal of Composite Materials 2010; 44:2393-2411 [5].
Journal of Composite Materials 2008; 42:825-844 [10].

However, the carbon chains bonding in the silica petin materials were influenced by the temperature of calcination.
Elma, "Chemical cleaning to evaluate the performance of silica-pectin membrane on acid mine drainage desalination," IOP Conference Series: Materials Science and Engineering, vol. 1195, no. 1, p. 012057, 2021/10/01 2021
Elma, "Membrane pervaporation performance applied for brackish water prepared by vacuum impregnation method," IOP Conference Series: Materials Science and Engineering, vol. 1195, no. 1, p. 012056, 2021/10/01 2021
Lu, "Hydrothermally robust molecular sieve silica for wet gas separation," Advanced Functional Materials, vol. 16, no. 9, pp. 1215-1220, 2006
Smart, "Development of rapid thermal processing of tubular cobalt oxide silica membranes for gas separations," Journal of membrane science, vol. 456, pp. 192-201, 2014

Apparently, this is due to the prospects of the use of such reactions in engineering, especially in developing new materials that are environmentally safer and economically advantageous to the existing materials [1, 2].
This opens the way for the synthesis of substances and materials in nanocrystalline and amorphous states [1, 2].
The Functional Materials laboratory, St.
Suryanarayana, Mechanical alloying and milling, Progress in Materials Science, Vol. 46 №1-2 (2001) 1-184
Arestov, Kinetics and structure of refractory compounds and alloys obtained by mechanical alloying, Journal of Materials Science and Technology, Vol. 17 № 1 (2001) 63-64.

Journal of Macromolecular Science, Part B: Physics, 36(2), 169-173
Journal of Applied Polymer Science, 131(21)
Reviews on Advanced Materials Science, 28(1), 26-30 [17] Ji, B.
Journal of colloid and interface science, 333(1), 242-248
Journal of colloid and interface science, 397, 65-72

Besides, some researchers also obtained full-biological degradation materials through compounding starch with other natural polymers such as cellulose, chitosan, lignin etc. [10-13] Though cellulose, chitosan and lignin are natural materials, they need a certain process for purification, which increases the preparation cost of the composite.
Raw materials such as thatch powder and starch were weighed according to the recipe, and then hand-stirred in a beaker for 3 min to mix the sawdust and adhesive starch uniformly.
Journal of Henan University of Science and Technology: Natural Science, Vol. 27(1) (2006), p. 61-65 [10] Xiaowei He, Qiang Huang:Starch-based biodegradable materials [M].
New Chemical Materials, Vol. 8 (1997), p. 21-23 [13] Chunhong Zhang, Ronghua Wang, Qiulin Chen, et al:Development of Application of Plant Fiber in Full-biodegradable Composites[J].
Materials Review, Vol. 21(10) (2007), p. 35-38