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Analysis of Pitch Curve of Internal-curved Planet Gear Pump Zhenhui Luana,Chao Wangb ,Weipeng Gaoc Mechanical Engineering school, Anhui University of Science and Technology, Huainan, Anhui, 232001, China azhluan@aust.edu.cn,bhxjxwangchao@126.com, cweipeng87@126.com Keywords : Inner curve, Planet gear pump, Pitch curve, Design , Calculation.
Acknowledgements This work is supported by Anhui Provincial Natural Science Research Projects in Colleges and Universities (KJ2012A075).
Journal of Anhui University of Science and Techn0logy(Natural Science), Vol. 30(2010) NO.2,p.17.
[2] Z.H.Luan:Research on Non-circular Planetary Gear Pump.Advanced Materials Research Vol. 339 (2011) p 140-143

Numerical simulation of compressive experiment of Coal Seam in deep underground for geological storage of carbon dioxide Fengshan Han1, 2,a, Xinli Wu 3, b 1Research Center for Numerical Tests on Material Failure, Dalian University, Dalian, 116622, China 2 State Key Laboratory of Coal Resources and Safe Ming, China University of Ming and Technology, Xuzhou, 221116, China 3 Colleague of Engineering, the Pennsylvania State University, Pennsylvania, USA ahanfs@sohu.com, bxinli@psu.edu Keywords: Coal seam, deep underground， compressive experiment， numerical simulation，, geological storage Abstract:.
In this paper, the input material mechanical property parameters used for our numerical model of coal sample are listed in Table 1.
unconfining pressure by numerical simulation Conclusions From the progressive failure for coal sample under the condition of confining pressure 25Mpa it can be clearly seen that failure shape of coal seam in deep underground under triaxial compressive experiment of lateral pressure of 25Mpa is typically shear failure, and From the progressive failure for coal sample under the condition of unconfining pressure by numerical simulation， failure shape of coal seam under the condition of unconfining pressure is compresive and shear，and its failure surfice has chractteristics of fractal ，and it is shown by numerical simulation that failure shape of coal seam in deep underground under triaxial compressive experiment of lateral pressure of 25Mpa is typically shear failure, and characteristic of deformation is obviously elastic-brittle, which is significance to understand the performance of the coal seam in deep underground Acknowledgements This research is funded by the “Project of science
and technical program of the Educational Department of Liaoning Province (L2012436) ” and “Open Projects of State Key Laboratory of Coal Resources and Safe Mining of China University of Ming and Technology (11KF07) ” and “Dalian science and technolodge program project (20120783) ” References [1] Lei Neng-zhong, Journal of Hefei University of Technology(social science), Vol.25（2011），p：46 (in Chines) [2] Li Xiao-chun, Fang Zhi-ming, Wei Ning, et al，Rock and Soil Mechanics, Vol.30（2009），p :2674 (in Chines) [3] C.A.Tang,.
Tang, S..H.Wang,Y..F Fu, Numerical test of rock failure process，Science press，Beijing， 2003 [7] Wong S, Law D, Deng X, et al，Int J Greenhouse Gas Control ，Vol.1（2007）p :215

Experimental Materials.
Journal of Applied Polymer Science. 85 (2002) 1593 – 1606
Polymer nanocomposite research advances, Nova Science, New York, 2008, pp. 175 - 227
Composites Science and Technology. 70 (2010) 1429 – 1436
Composites Science and Technology. 69 (2009) 2587 – 2595

Alves Claro1.d 1 Department of Materials, Faculty of Engineering Guaratinguetá, São Paulo State University-UNESP, Av.
However, they are considered bioinerts materials because when they are inserted into the human body they are cannot form a chemical bond with bone.
Materials and Methods The Ti-7.5Mo alloy was produces from sheets of commercially pure titanium (99,9%) and molybdenum (99,9%).
Ray: Corrosion Science Vol. 46 (2004), p. 877
Narayanan: Journal of Dentistry Vol. 36 (2008), p. 500

J, ASTM Journal of Testing and Evaluation, (2007), vol. 35, no. 3, pp. 310-320
[4] Prakash Jadhav, Effect of ply drop in aerospace composite structures, Key engineering materials, (2020), 847, pp 46-51
the V-notched beam method, American society for testing and materials, (2019) [12] Prakash Jadhav, Wavy trailing edge feasibility for aircraft engine composite fan blade, Material science forum, (2022), 1060, 51-56.
https://doi.org/10.4028/p-4ubl99 [13] In-Plane Shear Test for Composite Materials, Slepetz, J.M., Zagaeski, T.F., Novelle, R.F, AMMRC-TR-78-30, Army Materials and Mechanics Research Center, MA, (1979)
[15] Fok and J Smart, The notched beam in asymmetric four-point bending for brittle material testing, The Journal of Strain Analysis for Engineering Design, (1994), 29(4):289-298.

Experimental Materials.
The powdery mixed materials were loaded into sic crucible by a tubular way, and outer and inner of the tube were filled with coal.
Coal mixed with raw ore hereinafter refers to inner coal; Coal out the tubular mixed materials hereinafter refers to outer coal.
This Tunnel kiln was being used to produce DRI (Direct Reduction Iron) with iron scale as raw materials at that time.
Mixed materials went through three stages in the Tunnel kiln, including 12h preheating, 12h heat preservation and 25h cooling.

[2] Solihin, Eko Sulistiyono, Synthesis of magnesium carbonate using indonesin dolopite, Advanced Materials Research. 1112 (2015) 546-549
Karagoz, A quantitative-metallographic study of the sintering behavior of dolomite, Materials Characterization. 52 (2004) 331-340
[7] Jing Hua Xue, Min Fang Han, Qing Yun Wang, Study of carbonizing processes for sintered dolomite, Key Engineering Materials. 336-338 (2007) 2552-2555
Hübner, Effect of Fe2O3 additions on sinterability of konya dolomite of turkey, Key Engineering Materials. 264-268 (2004) 1819-1822
Gömze, Influence of composition and grain size distribution on the properties of limestone and dolomite asphalt fillers, Materials Science Forum. 729 (2012) 344-349-2013

Materials and decoration.
Although materials that can cause people feel nostalgic need to be carefully thought, it is not to say that they must be very buckish.
Due to a series of physical and chemical changes and undeveloped materials science and technology, the environment color gradually faded after weathering, erosion, oxidation and these series function.
Old items are the most effective materials that can cause people nostalgic.
Journal of Shanxi Teachers University (Social Science Edition), Vol.32-2(2005): p.54-57

It was synthesized in a new method by using fatty alcohol-polyoxyethylene ether MOA-3, thionyl chloride and sodium isethionate as raw materials, and then the intermediate chloride polyglycol ether MOACl-3 reacted with sodium isethionate in a superbasic system KOH-DMSO.
Experimental Apparatus and Chemical reagents We synthesized the object through halogenation, K-activation and O-alkylation with fatty alcohol polyoxyethylene ether (Haian petrochemical plant, Jiangsu), thionyl chloride (Tongfang Fine Chemical Co., Ltd., Shanghai), pyridine (Basifu Chemical Co., Ltd., Tianjin), sodium isethionate (Jinnuo Chemical Co., Ltd., Wuhan), DMSO (Hansen Chemical Co., Ltd., Zhuzhou) and KOH(Huadong Chemical Reagent Factory, Shenyang) as raw materials.
Journal of Xi’an Shiyou University: Natural Science Edition, Vol. 25(2010), p. 57-61, in Chinese

Materials and Methods Materials.
Sutradhar, Mechanical and Tribological Characteristics of Copper Alloyed Austempered Gray Cast Iron (AGI), Materials Today: Proceedings 5 (2018) 3664–3673
Journal of Alloys and Compounds, 689 (2016) 408–415
Womersley, Thermal spraying and powder spray welding processes for the hard facing of grey cast iron, Materials & Design 11(3) (1990) 153-155
Zhou, Improved fatigue wear resistance of gray cast iron by localized laser carburizing, Materials Science and Engineering: A 644, (2015) 1-9 [15] G.K.