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Online since: January 2014
Authors: Jia Liu, Run Chang Zhang, Li Jiang, Wei Lian Qu
Fig.7 Von Mises stress Conclusion Distributed properties of welding residual stress in bridge nodes are researched in the paper, it can be concluded that (1) The longitudinal welding residual stress distributed closely to the weld joints and the maximum value reaches the material yield strength of Q345qD steel, which has a greater impact on fatigue strength of the structure; (2) The longitudinal welding residual stress distributed relatively uniform, the maximum value of welding residual stress may occur at any position near the welding joint; (3) The distributed properties of Von Mises stress is in accordance with the longitudinal direction of the welding residual stress.
Acknowledgements This work was financially supported by the National Natural Science Foundation Program (51108363).
Materials and Design.
Journal of Constructional Steel Research. (2012)
Journal of Dalian Railway Institute.
Online since: January 2015
Authors: Hui Yu Xiang, Fu Zhao, Hong Bing Xin, Yuan Zhang, Chun Ling Meng, Yan Jue Gong
Modeling and Simulation Research of Time-Dependent Reliability Model of Link Rod in Needle Bar Mechanism Gong Yanjue1, a,Zhao Fu1, b, Xin Hongbing1, c, Xiang Huiyu1, d, Meng Chunling1, e, Zhang Yuan1, f 1School of Material and Mechanical Engineering, Beijing Technology and Business University, China ayjgong@th.btbu.edu.cn,bzhaoffu@163.com, cXinhb@th.btbu.edu.cn, dXianghy@th.btbu.edu.cn, emengcl@th.btbu.edu.cn, fzhangyuan1965@126.com Keywords: time-dependent reliability model; loading numbers; strength degeneration Abstract: The time-dependent reliability model of Mechanical Component is influenced by many parameters such as stress, load, strength, strength degeneration and lifetime index.
(5) Time-dependent Reliability Model with strength degeneration When the lifetime or the loading numbers N is stochastic variable and the probability density function is , the probability density function of fatigue lifetime n under the deterministic constant amplitude cyclic load s can be acquired by material fatigue strength experiments.
The yield strength of material is 415MPa.
Acknowledgement The paper is sponsored by Key Project of the Science and Technology Plan Project of Beijing Municipal Education Commission, Grant Number: KZ201210011012.
Reference: [1] Wang Zheng, Xie Liyang, Time-dependent reliability model of mechanical component under stochastic load, Mechanical Engineering Journal, Vol.43 (2009), P.20-25 [2] Sun Zhili, Chen Liangyu, Reliability model of mechanical drive system, North eastern University Journal, Vol.24 (2003), P.548-551 [3] Lin Yuanlie, Applied Stochasitic Process[M],Tsinghua University Press, 2012 [4] Li Xiaoyang, Jiang Tongmin, Stress-strength interference model based on performance degeneration, 2007 Annual Conference of China Aviation Society [5] Zio E.
Online since: December 2013
Authors: De Hua Wang, Gui Ping Shi, Yu Jing Gao
Meshless-Finite Element Coupling Method Yujing Gao 1, a, Dehua Wang 2,b and Guiping Shi 3,c 1,2,3 Shandong Vocational College of science & Technology,Weifang, Shandong 261053,China agaoyjing@163.com, bwangdehua2000@163.com, csgp.1981@163.com Keywords: The meshless method, the finite element method, coupling, matlab.
Discrete equations in Temperature field Consider two-dimensional steady-state temperature field problems (14) indicates the temperature, indicates the Dirichlet boundary, indicates the Neuman boundary, indicates the material density, along thedirection of the material thermal conductivity, along the direction of the material thermal conductivity, is the density of the heat source inside the object, and are the direction cosines of the outward normal boundaries.
International Journal for Numerial Method in Engineering, 1994,37:229~256 [4]T.
International Journal for Numerial Method in Engineering, 1998,41:1215~1233 [7]H.
Online since: February 2013
Authors: Zhi Gang Li, Yan Liu, Dong Qin Zhu
According with different arrival time, emergency supplies can be divided into four classifications: life-saving supplies, engineering support materials, construction materials and reconstruction materials[3].
Life Rescue (LifeRescue) is a sub-class of ERSubstance class, which contains four kinds of materials: Defend Thing, Life Salvation, Life Support and Rescue Transport.
Project Build is a sub-class of ERSubstance, including Project Device, Project Material, Apparatus, Light Device, Communication Video and Transport.
Study of Demand Structure of Emergency Resources [J].Journal of Catastrophology, 2010, 25(4), p. 127 [3] WANG Peng.
Based on cluster analysis and fuzzy evaluation of emergency materials reserve classification research [D] University of Science & Technology China,2010 [4] IEEE standard upper ontology working group(SUO-WG)[EB/OL].
Online since: September 2013
Authors: Wen Hong Tao, Xin Jin, Bao Li Du, Xing Hua Fu
The chemical composition of raw materials were characterized by Bruker Tiger S8 X-ray fluorescence spectrometer.
The chemical compositions of all experimental materials are listed in Table 1.
The mineral composition of raw materials were characterized by Bruker D8 X-Ray diffraction instrument.
Fig.1 demonstrated the XRD patterns of both two materials.
The XRD patterns of raw materials Fig. 2.
Online since: June 2011
Authors: M.H. Ishtiyaq, Anayet Ullah Patwari, A.K.M. Nurul Amin, A. Fakhruzi Majed, M.K. Daud
The very mechanical characteristics that give this alloy the highly valued properties also make it one of the most difficult-to-machine aerospace materials.
But ceramics are low conductive materials, and the heat generated during the machining of Inconel 718 transfers very slowly through them.
Unfortunately, ceramics are low conductive materials [7], and the heat generated during the machining of Inconel 718 transfers very slowly through them.
Elbestawi, Cutting Temperature of Ceramic Tools in High Speed Machining of Difficult-to-Cut Materials, Int.
Journal of mechanical Tool Manufacture, 36 (5) (1996) 611–634
Online since: October 2014
Authors: Xue Nan Mu, Lei Cao
Chinese Science Bulletin, 2006, 51, (Supplement2): 121-128
Journal of Xiamen University (NATURAL SCIENCE EDITION),2007, 46 (Suppl 1): 203-208 [5] Li Jialin, Yang Xiaoping, Tong Yiqin.
Analysis of Shenzhen reclamation impacts on the marine environment.Journal of Nanjing University (NATURAL SCIENCE EDITION), 2005, 41 (3): 286-296 [7] Wang Yonghong, Zhang Jing, Shen Huanting.
Advances in Earth Science, 2002, 17 (1): 69-77 [8] Chen Bin, Wang Jinkeng, Zhang Yusheng, et al.
Yancheng coastal wetland resource environment pressure and ecological control response.Journal of natural resources, 2004, 19 (6): 754-760
Online since: June 2009
Authors: Janice M. Dulieu-Barton, C.C. Ye, F.J. Lennard, D.D. Eastop, A.R. Chambers
Nevertheless, the Araldite adhesive has a better strain transfer coefficient than the conservation adhesive, although not as high as that expect with conventional engineering materials.
Experimental work has been initiated that has attempted to measure strains in textile materials using FBGs [1, 2].
Since Araldite 2015 has not been used in textile conservation, it was necessary to establish if the adhesive has any long term chemical effects on textile materials.
Future work will concentrate on assessing optical fibres of differing material.
References [1] Dulieu-Barton J.M., Sahin M., Lennard F.J., Eastop D.E. and Chambers A.R.: Key Engineering Materials, Vol. 347(2007), p.187 [2] Dulieu-Barton, J.M., Ye, C.C., Chambers, A.R., Lennard, F.J. and Eastop, D.E.:, Optical fibre sensors for monitoring damage in historic tapestries, SEM XI International Congress on Experimental and Applied Mechanics, 2008, Orlando, Florida [3] Chu T.C., Rason W.F., Sutton M.A. and Peters W.H.: Experimental Mechanics, Vol. 25(1985), p.232 [4] Yan J.H., Sutton M.A., Deng X., Cheng C.S.: International Journal of Fracture, Vol.144 (2007), p.297 [5] Oddy W.A.: Museums Journal, Vol. 73(1973), p.27 [6] Green L.R., Thickett D.: Studies in Conservation, Vol. 40(1995), p.145 [7] DaVis Version 7.2 User Manual, StrainMaster 3D - Getting Started, and http://www.lavision.de [8] Li D., Li H., Ren L., Song G.: Optical Engineering, Vol.45(2006), 024402-1-8 [9] Silva-Lopez M., Fender A., MacPherson W.
Online since: September 2013
Authors: S. Sundaresan
Extra low-carbon austenitic steel filler materials are sometimes used to join FSS.
In order to restore the original 50:50 phase balance, filler materials enriched in nickel by 2-4 % are in common commercial use.
Superduplex stainless steel filler materials have been successfully employed for welding of martensitic stainless steels for off-shore pipelines [7].
Usually matching filler materials, wherever available, are generally used.
Nilsson, Overview Superduplex stainless steels, Material Science and Technology 8 (1992) 685-700
Online since: August 2011
Authors: Li Qiu, Yi Liang Lv, Cheng Xi Jiang, Xiao Tao Han, Liang Li
Numerical Analysis of the Workpiece Velocity in Electromagnetic Forming Process Li Qiu1,a, Yiliang Lv1,b, Chengxi Jiang1,c, Xiaotao Han1,d and Liang Li1,e,* 1Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, China ahbzxqiu.li@163.com, blvyiliang0315@126.com, cjiangchengxi@smail.hust.edu.cn, dhanxiaotao@gmail.com, eliangli44@mail.hust.edu.cn Keywords: motional electromotive force; workpiece velocity; Electromagnetic Forming; Uniform pressure actuator.
The distance between the uniform pressure actuator and the workpiece circuit is about 1 mm which is filled with insulating material [2].
Daehn: Journal of Manufacturing Science and Engineering.
Newman: Journal of Materials Processing Technology.