Search results

Other conditions include: maximum working load Fmax =80N, pre-set working stroke h =50mm, fixing load Fmin =25N, fixing height H =74mm, number of active coils n≥3, spring material is 65Mn steel wire, I class spring is chosen and allowable shear stress [τ] =0.3σB (σB is spring material tensile strength limit), modulus in shear G =80000 Mpa, relative error of spring stiffness is less than 0.02.
For cylindrically helical compression spring, except choosing material and heat treatment, to meet spring’s mechanical behavior and geometric characteristics, three main structure parameters must be determined, including spring steel wire diameter d, mean diameter of coil D and number of active coils n.
The spring stiffness k = Gd4/ (8D3n), where, G is spring material modulus in shear, G = 80000Mpa.
References [1] Ziqiang Zhang, Shaobo Chen, Rundian Li, Zhidan Zheng, Shengguo Hu, Zhifeng Deng and Liwei Luo, Chinese patent 201210036367.X (in Chinese) [2] Ziqiang Zhang, Shengguo Hu, Shaobo Chen, Rundian Li, Zhidan Zheng, Zhifeng Deng, Yang Li and Shaoyu Xie: Key Engineering Materials Vol. 522 (2012), p.378 [3] Zhifeng Deng, Shengguo Hu, Ziqiang Zhang and Rundian Li, Chinese patent 201210176877.7 (in Chinese) [4] Chuo Meng and He Bu: Journal Harbin Univ.
Sci ＆ Tech, Vol. 19(5) (1995), p.76 (in Chinese) [5] Caisong Mo and Ganggang Wang: Coal Mine Machine, Vol. 27(6) (2006), p.943 (in Chinese) [6] Yongli Gan and Fuxing Zhang: Electro-Optic Technology Application, No. 4 (2003), p.67 (in Chinese) [7] Xinsheng Yuan, Dahong Shao and Shilian Yu: The Application of LINGO and EXCEL in Mathematical Model (China Science Press, China 2007) (in Chinese) [8] Lianggui Pu and Minggang Ji: Design of Machinery (China Higher Education Press, China 2006) (in Chinese)

Introduction: Aluminum is a corrosion resistance material which is widely used in aerospace applications doesn’t have appropriate wear resistance by itself.
The excellent field performance of zinc coatings results from its ability to form dense, adherent corrosion product films and a rate of corrosion considerably below that of ferrous materials [1] Titanium nitride (TiN) coated on aerospace Al7075-T6 in different conditions using PVD magnetron sputtering technique shows that the hardness of titanium nitride-coated specimens is increased significantly up to 720 HV, while the hardness of uncoated specimens was only 170 HV[2].
There is a strong dependency of the fatigue strength on the deposited material and the processing parameters [3].
No Material RHN 1 7075, T6 84.33 2 7075, T6 EN 10µ 87.667 3 7075, T6EN 15µ 87.333 4 7075, T6EN 20µ 87 Fracture Toughness Test.
Hamdi in : Optimizing the PVD TiN thin film coatings parameters on aerospace AL7075-T6 alloy for higher coating hardness and adhesion with better tribological properties of the coating surface of Int J AdvManufTechnol (2013) vol. 64 p.281–290 [5] Sarmed Abdalrasoul Salih, Abdalrasoul Salihh Mehdi Ali Safa Nouri Alsaegh In : Study the Effect of Nickel Coating on Fatigue Life of Low Carbon Steel Exposed to Corrosive Environments of Journal of Environment and Earth Science, www.iiste.org ISSN 2224-3216 (Paper) ISSN 2225-0948 (Online) Vol. 3, No.5(2013) p.121 [6] E.

Extraction of flavor nucleotides for soy sauce from Beer Yeast Paste Yuanxiu Wang a, Guixiang Zhang b,*, Xiaoyan Song c, Naxin Sun d and Yumei Li e College of Medicine and Life Science, University of Jinan, Jinan 250022, China achm_wangyx@ujn.edu.cn, bchm_zhanggx@ujn.edu.cn, cchm_songxy@ujn.edu.cn, dchm_sunnx@ujn.edu.cn, echm_liym@ujn.edu.cn, *Corresponding author Keywords: flavor nucleotides, soy sauce, yeast paste, concentrated saline, malt root Abstract.
During the fermentation of soy sauce, macromolecules of the raw materials are decomposed to such low-molecular-weight compounds as amino acids, aldehydes, alcohols, pyrones, esters and sugars [2,3].Thus, soy sauce has its unique color, aroma and flavor. 5’- IMP and 5’- GMP, two types of flavor nucleotides, mixed with amino acids, could produce a wonderful effect of taste than single flavor enhancer [4].
Hence, yeast is a convenient starting material for these flavor-enhancing 5’-nucleotides.
Materials and Methods Materials and Chemicals.
[6]P.Sombutyanuchit,M.Suphantharika,C.Verduyn: orld Journal of Microb.and Biotech.

Experimental Procedures Amorphous tantalum precursor was used as the starting material to promote the nitration reaction.
To synthesize the starting material, 110ml of hydrochloric acid and 24ml of methanol was mixed to create a 5mol% solution.
To synthesize nitrides with this precursor as the starting material, nitration treatment was conducted in an electric furnace containing an N2 and NH3 gas atmosphere (0.5 L/min) at 1000°C for 5 hours.
Lerch: Materials Science and Engineering Vol. 121 (2005), p. 137 [4] D.
Svensson: Journal of Materials Research Bulletin Vol. 24 (2004), p. 801 [7] C.

Fatigue Crack Growth Analysis of Semielliptical Surface Crack Akramin M.R.M1,a, Ariffin A.K.2,4,b, Kikuchi Masanori3,c, Abdullah S.2,4,d and Nik Abdullah N.2,4,e 1Universiti Malaysia Pahang, 26600 Pekan, Pahang, MALAYSIA 2Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, MALAYSIA 3Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, JAPAN 4Centre for Automotive Research, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, MALAYSIA aakramin@ump.edu.my, bkamal@eng.ukm.my, ckik@me.noda.tus.ac.jp, dshahrum@eng.ukm.my, eenikkei@eng.ukm.my Keywords: Stress Intensity Factor, S-Version Finite Element Model, Surface Crack and Fatigue Crack.
The S-FEM has been applied to diverse range of application such as heat affected zone material [2,3], corrosion cracking [4], crack closure effect [5] and composite material [6].
Improvement need to be made for simulation since Paris coefficient C, initial crack length and other material properties cannot be treated deterministically.
International Journal of Pressure Vessels and Piping Vol. 90–91(0) (2012), p. 2-8 [2] M.
Li, Stress corrosion cracking analysis under thermal residual stress field using S-FEM. 2011, Key Engineering Materials. p. 431-436

Michele Curioni1, a 1School of Materials, University of Manchester, M139PL, Manchester, United Kingdom amichele.curioni@manchester.ac.uk Keywords: Corrosion, Surface Treatments, Anodizing, Aluminium Alloys.
References [1] P.G.Sheasby, R.Pinner, The surface treatment and finishing of aluminium and its alloys, ASM International, Materials Park, OH, 2001
Thompson, Journal of Physics D, Applied Physics.
Advanced Materials Research, 2008
Bautista, Journal of the Electrochemical Society (USA).

However, it will be the development and construction of emerging tourist attractions, greatly enhance the Qujiang tourism resources in the future if they continue to develop urban transport, catering accommodation and other infrastructure.In the future , Qujiang New District will become a tourism, residential, leisure, exhibition, trade, science, education and other functions into one city district, will become an important cultural center, tourist centers and tourist hub in western China.
Table 6.Qujiang New Resources and Environment Carrying Capacity of Grading Quantitative Evaluation Table Classification I II III The numerical of EBR 0-0.8 0.81-1.0 ＞1.0 Exploitability The development is insufficient , which is suitable for a large number of development It developswith the balance, which must be paied attention to control It has been the development of excessive, which is inappropriate in the development Analysis of the Environmental Bear Capacity in Qujiang According to the material of 2003 qujiang on-site investigation result, national and provincial standard, the basic data of resource in qujiang new district and its EBC is listed in the table 4.6 (the EBC of the comprehensive development zone is given by the primary standard GB3095-1906, the result is biased toward conservation).
References [1] Hanying MAO, Danlin YU A Study on the Quantitative Research of Regional Carrying Capacity, Advance in Earth Sciences Vol. 16 No.4 (Ang. 2001) [2] Zaide PENG, Kai YANG and Yun WANG The Primary Exploring of the Research Method of EASC, China Environmental Science Vol. 16 No.1 (Feb. 1996) [3] Hongcheng ZHANG, Rui QUAN Study on Xi’an Qujiang Mode From the Perspective of Social Engineering, Journal of Northwest A＆F University(Social Science Edition) Vol.13 No.2 (Mar, 2013) [4] Yu HUANG Environmental Status and Capacity Analysis of Xi’an Qujiang New District, management Vision·InternetFortune(Jul, 2009) [5] Zhonggen WANG, Jun XIA Quantitative Analysis on Bearing Capacity of Ecological Environmental, Journal of Changjiang Vocational University Vol.16 No.4 (Dec, 1999)

Microdiffraction analysis used to identify the phases that present in the material.
It is assumed that the structural changes entail higher strength material of high-speed steel.
Viorel-Aurel: Microstructure and abrasion wear resistance of thermally sprayed cermet coatings // Materials testing 55 (2013), No.1, pp. 47-50
Characterization of nitrocarburized surface layer on AISI 1020 steel by electrolytic plasma processing in an urea electrolyte // Journal of Materials Research and Technology. 2 (3) (2012), pp. 213-220
Electrolytic plasma technology: Science and engineering – an overview // Surf.

Among the ways to join CFRP and Al together, adhesive bonding has the advantages that it needs no connecting holes and fasteners, has very wide load distribution areas and light joint structural weight and there are no problems of galvanic corrosion in connection of different materials and so on.
Up to now, however, effects of the curing technology of heterogeneous materials on the mechanical properties of the adhesive joints haven’t formed ripe theory and methods and further studies are needed.
Orthogonal Test Research The Materials and Sizes of CFRP/Al.
Acknowledgments We gratefully acknowledge the support of National Science Foundation of China (Grant No. 50805119) and Aoxiang Star Program in Northwestern Polytechnical University, P.
Struct, Vol. 73(2006), p. 310-317 [3] Information on http://www.boeing.com/commercial/787family/background.html [4] H.T.Qiao, X.W.Zou and S.H.Lai: Journal of Aeronautical Materials, Vol. 22 (2002), p. 46-50 (In Chinese) [5] Lapique F and Redford K: Int.

A First-Principle Study of Fe-Doped Co3O4 on N-Doped Graphene as Electrocatalyst Chunying Wang1,a 1School of Material Science and Engineering, Tianjin University, Tianjin, P.R.China awangchunying@tju.edu.cn Keywords: Oxygen reduction; Zinc-air battery; Co3O4; Doping transition metal; Catalytic mechanism; First-principle calculations Abstract.
This method has been used to predict the trends and effectiveness of different catalytic materials successfully.
It also provides the basis for the preparation of compositing materials as high efficiency electrocatalysts.
Advanced Materials (2020) [7] G.
International Journal of Robotics Research, 6(2):134-139 (2017) [8] J.