Search results

Analyze According to the changeover process of AS shield, which is Preparation, Changeover, Checking/Debugging and Measuring, the project members analyze the possible causes from 5M1E (Man, Machine, Material, Method, Measurement, Environment) through brainstorming.
Acknowledgements This work was supported by National Natural Science Foundation of China (Grant No. 71171110 and No. 71371097).
International Journal of Production Economics.
International Journal of Production Economics.

Contact Stress Analysis on A Large-Sized Four Contact-Point Slewing Bearing with Negative Axial Play Yanshuang Wang1,a, Haifeng Zhu1,b 1Henan University of Science and Technology, Luoyang 471003, China aEmail:hkd_wang_yan_shuang@126.com Key words: bearing; four point contact; negative play; contact stress Abstract: The analysis method on contact stresses between balls and inner/outer ring raceways of a large-sized four contact-point slewing bearing with negative axial play was present.
Table 1 Parameters of the computed bearing Four contact-point slewing bearing Number of ball N 256 Inner raceway groove curvature coefficient fi 0.53 Outer raceway groove curvature coefficient fo 0.53 Ball diameter Db（mm） 45 Pitch diameter dm(mm) 2215 Shear elastic modulus E(N/m2) Poisson’s ratio 0.3 the mass density of the ball material (kg/m3) 7300 When the axial play is -0.03mm,.the distribution of the contact stresses between balls and the left-inner raceway is shown as Figure 3, the according maximum contact stress is 975.5MPa.The distributions of the contact stress between balls and the right-inner raceway, right-outer raceway, left-outer raceway are similar to the above, the according maximum contact stresses are 982.7MPa, 974.9MPa and 968.1MPa.
Journal of Tribology, Transactions of the ASME, Vol.114(1992), p.530-539
High-speed ball bearing analysis[J] Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, Vol.220(2006), p.537-544

Springback becomes more significant when stamping the advanced high strength steel because of the high yield stress of material.
Asnafi: International Journal of Mechanical Sciences, Vol. 43 (2001), No. 1, p. 5-37
Chu: International Journal of Solids in Structure, Vol. 27 (1991), p. 1035-1046

Due to the load condition and character of the structure, the maximum stress of the structure appears in the doorpost position, it's value is 273Mpa which is less than the material bending strength, so it meets the require of the work condition.
Ranjbar: Engineering Failure Analysis, Vol. 16(2009), p. 923 [2] You-Gang Tang, Su-Xia Zhang, Cong Yi: Journal of Sound and Vibration, Vol. 97(2006), p. 408 [3] Ching-Yu Hsu, Cho-Chung Liang, Sheau-Wen Shiah, Chan-Yung Jen: Ocean Engineering, Vol. 32(2005) , p. 1098 [4] R.Curran, G.Gomis, S.Castagne, J.Buttereld, T.Edgar, C.Higgins, C.McKeever: International Journal of Production Economics, Vol. 109(2007) , p. 27 [5] Rivka Oxman: Design Studies, Vol. 127(2007) , p. 229 [6] Yuan-JyeTseng, Yu-WenKao, Feng-YiHuang: Computers in Industry, Vol. 59 (2008), p. 798 [7] A.Coulibaly, R.Houssin, B.Mutel: Computers in Industry, Vol. 59(2008), p. 438 [8] Yong Bai, Qiang Bai: Subsea Pipelines and Risers (Elsevier Science Ltd, United States 2005).

The accurate modal analysis of complex structure using the finite element analysis software provides a science theory basis for the optimization design and prediction of dynamic property of new product and the existing structure.
Conclusions The comparison shows that the optimized structure of the bed structure saves more the original material and lightens more weight than the original structure, and reduces the cost.
JOURNAL OF MECHANICAL ENGINEERING, 2011,47(3):135-140 [2] LU Jun, WEN Huaixing, ZHANG Gongxue, etc..
Journal of Mechanical Transmission, 2010,34(12):48-51 [6] SONG Zhian.

By the introduction of localization-mode method, the structure’s local mode and maximum strain energy zone are regulated, which realized the optimization of damping material placement.
Acknowledgment The writers gratefully acknowledge the financial support provided by the National Natural Science Foundation of China (Grant no. 50878010).
He: Journal of Beijing University of Technology, Vol. 35 (2009), p. 1624 (In Chinese) [2] Z.C.
Yang: Chinese Journal of Theoretical and Applied Mechanics, Vol. 42(2010): p.290 (In Chinese) [4] J.H.

Characteristics of New Absorbent System of Heteropoly Compound Solution for H2S Removal Jing Wang 1, Rui Wang 2, a 1 State Intellectual Property Office of China, No.6, Xitucheng Road, Haidian District, Beijing, China 2 School of Environmental Science and Engineering, Shandong University, Jinan, 250100, China aree_wong@hotmail.com Keywords: Hydrogen Sulfide; Desulfurization; Liquid Redox; Absorption; H4PVMo11O40 Abstract.
Introduction Hydrogen sulfide, as a highly undesirable contaminant existing in industrial gases, such as natural gas and coke oven gas, has long been confirmed to be hazardous material which should be removed to the possible lowest limit for reasons from both environmental restrictions and process requirements.
Journal of Chemical Engineering of Japan., Vol. 35(2002), p.15 [6] R.
Chemical Journal of China Universities., Vol. 23(2002), p.303 [7] R.

Although candidate materials for the intended application typically include wrought AISI 415 and cast CA6NM, a martensitic 410 stainless steel (SS) was especially selected in this study due to its greater crack sensitivity.
Thanks are also due to Hydro-Québec, Alstom renewable Energy, National Science and Engineering Research Council of Canada (NSERC) and the Aero 21 Program of NRC for their financial support.
Fihey, Hybrid Fiber Laser–arc Welding of 10-mm Thick CA6NM Stainless Steel, Materials Science & Technology. (2014) Pittsburgh, PA, USA
Journal.

The goal of this work is to apply the matching asymptotic method combined with a variational approach to study the initiation and the propagation of a cohesive crack from the tip of a preexisting notch following the Dugdale cohesive force model when the characteristic length of the material (included in the Dugdale model) is small by comparison with the characteristic length of the body. 1.
Journal of Nonlinear Science, 20(6):831--868, 2010.

Acknowledgments This work are financially supported by the National Natural Science Foundation of China (51464007), Guizhou Natural Science Foundation (Z123082), Dr.
Funds of Guizhou university ( X131051), Key Lab Funds of Comprehensive Utilization of Guizhou Non-metallic mineral resources(X201001), Hunan Provincial Natural Science Foundation of China (14JJ3124), Natural Science Foundation of Hunan University of Technology (2013HZX20).
Zhang: Journal of Beijing university of science and technology, Vol.35(3)(2013), p. 282-287 [9] M.
Zhang: Advanced Materials Research, Vol.391 (2012),65-70 [11] H.