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Optimal Design on Reduction Device based on the most Small Gear-Worm Jie Yu1,a, Pei-si Zhong2,b 1 College of mechanical engineering, Shandong University of Technology ,Zibo255000,China; 2 College of mechanical and electronic, Shandong University of Science and Technology, Qingdao 266000,China ayujiezb7@sdut.edu.cn, bpeisizhong@163.com Keywords: Reduction device of gear; Optimal design Abstract.
Mishing, in: Diffusion Processes in Advanced Technological Materials, edtied by D.
Clem: submitted to Journal of Materials Research (2003) [6] Elidrissi M C, Roney A, Frigon C, et al.

Vibration isolation and noise reduction design of the AH20 motor’s lifting up structure Laiqiang Li1,a, Shuling Wang2,b，Bo Xu1,c 1, School of Energy and Power Engineering, USST, Shanghai, 200093, China 2, School of Material Science and Engineering, USST, Shanghai, 200093, China alaiqiangli@163.com,bwwwusst@163.com, cxubo1027@sina.com Keywords: lifting up structure; vibration; modal analysis; Abstract: Compared with sewing machine driven by traditional match motor, industry sewing machine driven by AH20 motor have economy energy, intelligent degree, install convenience, operation simple and ability completely etc.
The material attribute of each part of the AH20 motor and lifting up structure is shown as Table 1.
Material attribute of each part material Elastic modulus E(GPa) Poisson's ratioμ Density ρ(kg/m3) Baffle, Tighten Bolt 45#steel 210 0.3 7800 Base{TTP}12289 , Pulley{TTP}12289 , End Cover ADC12 71 0.33 2680 Claw{TTP}12289 , Motor Block 6063Al 70 0.33 2690 Rotor 20Cr 208 0.3 7830 Control Box ABS777e 2.5 0.4 1050 Fig.2 Finite element model and it’s first three expansion modal Take all displacement restricted on the tighten bolt and solve the model with Block Lanczos method.
Journal of Experimental Mechanics, 02 ,2008:157-161.

It has been widely used to obtain an optimum strength/material mass ratio for structures under specified load conditions [3].In our case modeling and initial optimization was done in Pro/EngineerTMto save time however AnsysTM is used for final FEM structural analysisto get accurate results as analysis in Pro/EngineerTM is relatively less accurate because of lesser number of nodes generated while meshing the part.
Q345 of steel was used as material of arm and its properties are given in table 1.
Table 1 Properties of the material used Material Density Modulus of elasticity Poisson’s ratio Q345 7.85e-9tonne/mm2 2.1e5 0.3 Forces were taken at the extreme working conditions as shown in fig. 4, whereThesis, The Graduate School of natural and Applied Sciences of Middle East Technical University, May 2005, pp. 1-4, 68-69
Prajapati: submitted to IACSIT International Journal of Engineering and Technology (2011)

MATERIALS AND METHODS Materials.
Acknowledgments We thank the Natural Science Foundation of Zhejiang province (Y4110130) for the Financial Support.
Pingdong, Kinetics of enantioselective hydrogenation to synthesize ethyl ( R)-2-hydroxy-4-phenylbutyrate, CIESC Journal 57 (2006) 46-51 2006

Introduction MIPs are polymeric materials specially designed to offer high recognition to specific templates just like the recognition between enzymes and antibodies by molecularly imprinted technology (MIT).
Acknowledgements This work was financially supported by National Natural Science Foundation, PR China (Grant No. 81173657, 20962012, 30973959).
Advanced Materials Research Vol. 160-162 (2011) p. 777
Journal of Chromatography B Vol. 850 (2007), p. 24

Components' thermal thresholds Component Tsup (°C) Tsup*(°C) CPU 94.00 91.00 DIMM 87.00 84.00 Chipset 88.00 84.00 PSU 110.00 107.00 HDD/SSD 60.00 55.00 Three useful materials for the simulation model were considered.
These materials are widely considered in server designs.
The selected materials were used in [5] and [19] in their server and desktop computer simulations, respectively.
This method was applied in [34] to minimize the deformation of the server bottom cover considering concepts of the science of materials; in our case, the optimization strategy will aim to optimize the heat transfer processes within the server, minimizing the differential temperature, improving the airflow behavior and reducing costs.
Jung, Characteristics of environmental factor for electrochemical migration on printed circuit board, in: Journal of Materials Science: Materials in Electronics. 19(10) (2008) 952–956. doi.org/10.1007/s10854-007-9421-3. [19] E.

Lokesh, Comparative study of electrode material (iron, aluminum and stainless steel) for treatment of textile industry wastewater, International Journal of Environmental Sciences, 4(4) (2013) 519-531
Sillanpää, Natural organic matter removal by coagulation during drinking water treatment: A review, Advances in Colloid and Interface Science, 159(2), (2010) 189-197
Sahu, Reduction of COD and color by polymeric coagulant (chitosan), Journal of Polymer and Biopolymer Physics Chemistry, 1(7) (2013) 22-25
Virupakshi, Treatment of tannery wastewater using natural coagulants, International Journal of Innovative Research in Science, Engineering and Technology, 2(8) (2013) 4061-4068
International Journal of ChemTech Research, 9(5) (2016) 771-780.

He investigated the fatigue behaviour of materials under constant loading amplitude regime.
Fatigue damage in materials can be classified into two broad categories, namely crack initiation and crack propagation.
The damage variable D has a value of 0 for virgin material and 1 (or less than 1) for completely damaged material.
Chaboche, Mechanics of Solid Materials, Cambridge University Press, 1998
Shaw, Prediction of fatigue thresholds in adhesively bonded joints using damage mechanics and fracture mechanics, Journal of Adhesion Science Technology. 15 (2001) 763-781

Rajeshkannan1, a 1Mechanical Engineering, School of Engineering & Physics, Faculty of Science, Technology & Environment, The University of the South Pacific, Laucala Campus, Suva, Fiji.
Introduction Composites are usually synthesized using similar and/or dissimilar materials for some specific purpose, where a single material or alloy could not be satisfying to the requirement [1].
The elimination of porosity in the preform alters the initial volume substantially that complicated the development of plasticity theory in P/M materials.
Therefore the materials parameters such as Poisson’s ratio, modulus of elasticity would undergo changes along with pore closure.
Saha: Journal of Light Metals, 2(4) (2002), p. 215

Fig.2 Microstructures of FSW joint for Al5083-O alloy: (a) the base material, (c) the stirred zone. 3.2 Result of tensile test The results of tensile test of Al5083-O alloy base material and FSW joint are shown in Table 2.The tensile strength of each condition of FSW is the same as base material.
The FSW joint has lower fatigue limit than base material.
But, 500 rpm-100 mm/min specimen showed fatigue failure at HAZ the same as base material.
Colligan: Material flow behavior during friction stir welds of aluminium.
International Journal of Fatigue 25 (2003) 1399-1409 1 2 3 600µm 60µm 300µm