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Online since: December 2012
Authors: Guo Jun Du, Dong Yu Xia, Mei Fen Wang
Introduction Many researchers studied the microcrack healing in ceramic materials [1-4], the mainly mechanisms for crack healing are: diffusion thermal healing, adhesion from inter molecular forces and reaction products from chemical reactions at the crack tip.
Computation procedure Copper is chosen as the simulated material.
Acknowledgements The present work was supported by research and development plan of Qinhuangdao science and Technology under Contract 201001A027 and 201101AI63.
[9] M.Li, W.Y.Chu, K.W.Gao, L.J.Qiao, Material Letters 58(2004)543-546
J Comput Phys.1976,20(13):130~139 [12] Yizhou Zhou, Benlian Zhou, Xiaonan Guo, Guanhu He, Futian Zhang, Chinese Journal of Materials Research, 2000,14(1):29-36.
Online since: October 2007
Authors: Jae Kwan Kim, Jerzy A. Szpunar, Kyu Seok Han, Jong Tae Park
Szpunar2,d 1 Electrical Steel Research Group, Technical Research Laboratories, POSCO, Pohang-shi, Kyungbuk, Korea 2 Department of Mining, Metals and Materials Engineering, McGill University, 3610 University Street, Montreal, Quebec, Canada, H3A 2B2 a kshan21@posco.com, b jtpark20@posco.com, cjkwankim@posco.com, djerzy.szpunar@mcgill.ca Keywords: Grain oriented electrical steel, recrystallization, grain growth; texture; CSL, misorientation angle.
Bunge, Texture Analysis in Materials Science, Translated by P.R.Morris, Butterworths, London, (1969) [2] Y.
Lin, Journal of Magnetism and Magnetic Materials, 160(1996) 143 [3] Y.
Online since: September 2011
Authors: Jun Yang, Chen Xi Xia, Da Yong Chen, Shun Bo Li
Numerical simulation of square steel tube beam filled with steel-reinforced high-strength concrete dynamic response under impact load Shunbo Li; Jun Yang; Chenxi Xia; Dayong Chen (State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China) Keywords: ANSYS/LS-DYNA; stress wave; STSRHC; numerical simulation Abstract: Using ANSYS / LS-DYNA to study the dynamic response of square steel tube beam filled with steel-reinforced high-strength concrete under impact loading at different speeds.
Material model and parameters Steel tube, I-beam, impact block described by Johnson-cook model, the stress strain relationship can be expressed as [7] (1) Where: and m are material constants, is the equivalent plastic strain,, T is the corresponding temperature.
Table 1 The main parameters of Johnson-cook 7.85 210 0.22 910 580 0.016 0.26 1.03 Table 2 JHC model material parameters of concrete A B N C 2440 0.79 1.60 0.61 0.007 0.048 7.0 14.86 0.04 1.0 0.01 0.016 0.001 85 -171 208 0.08 0.004 0.1 Concrete uses JHC dynamic damage model, which can reflect the dynamic response of brittle materials such as the concrete under high strain rate and high confining pressure, as well as the failure of the material damage [8]
Analysis of axially-loaded short columns of square steel tube filled with steel-reinforced high-strength concrete[J].Journal of Northeastern University,2008,29(10):1502-1504( In Chinese) [7] Hallquist J O.
Online since: February 2013
Authors: Shi Sheng Zhou, Yan Zhang, Bing Feng, Cong Jun Cao
Experimental materials, apparatus and conditions. a) Experimental materials: coated paper, gravure paper, film, SIGWERK Ink; b) Experimental apparatus: IGT testing system, X-Rite 528 Spectrophotometer; c) Experimental conditions: ambient temperature: 24℃, ambient humidity: 50%; d) Measurement conditions: light source: D50, visual field: 2° [2,3].
Table 1 Reproduction of gravure printing inks on coated paper and gravure paper Type coated paper paper for gravure ΔE L* a* b* L* a* b* Paper 95.67 0.74 -4.03 93.51 0.21 3.15 7.52 C 51.5 -27.1 -50.6 52.19 -27.69 -40.77 9.87 M 50.67 69.77 -4.93 50.59 65.33 -0.62 6.19 Y 88.78 -4 92.51 85.68 -2.64 86.14 7.21 Table 2 Reproduction of gravure printing inks on coated paper and film Type coated paper film ΔE L* a* b* L* a* b* Paper 95.67 0.74 -4.03 95.35 -0.71 -0.69 3.66 C 51.5 -27.1 -50.6 51.39 -28.53 -49.95 1.57 M 50.67 69.77 -4.93 51.91 67.01 -6.48 3.40 Y 88.78 -4 92.51 88.72 -5.54 89.81 3.11 As shown in Table 1 and Table 2, the great difference is shown on different backgrounds and different materials.
Wu: Journal of Shaanxi University of Science & Techonology Vol. 25 (2007), p. 80-83 [5] Information on http://www.igt.nl/igt-site-220105/index-uk/specs/specg1.html.
Online since: March 2014
Authors: Jie Li, Ya Bin Liu, Yang Pei, Yun Gang Li
Introduction At present, tungsten metal material production is the main method used in powder metallurgy tungsten powder or alloy powder compaction, sintering.
Differential thermal analysis method is at the same temperature to be measured in the system and the reference material to a certain speed heating or cooling, curve recording system tested and does not change the temperature difference between the base material and time.
When the tested system with phase change, because there are endothermic or exothermic reaction, then measured reference material system and reference temperature difference will change, so as to obtain the differential thermal curve reaction endothermic or exothermic Gu Huofeng, according to the curve to determine the phase transition temperature.
Acknowledgments This study was financially supported by the National Natural Science Foundation of China (No. 51074060).
Chinese Journal of Materials Research Vol. 15(2001), p 459 [2] N.
Online since: June 2013
Authors: Yi Hong Zhao, Long Wu, Hua Feng Lu, Rong Fa Chen, Zhi Long Li, Hua Yang
Introduction As the connecting rod material, the 2A14 aluminum alloy had become an important material due to its excellent mechanical property, forging property and heat resisting property [1-3].
Hong, Technological study of liquid die forging for the aluminum alloy connecting rod of an air compressor[J], Journal of Materials Processing Technology, 2003(139), pp. 462–464
Materials Science and Technology (2006), pp. 293–295.
Online since: October 2006
Authors: N. Frage, Natascha Froumin, M. Lomberg, Shmulik Barzilai
Frage 1, d 1 Department of Material Engineering, Ben-Gurion University, P.O.Box 653, Beer-Sheva 84105, Israel 2 NRC-Negev, P.O.Box 9001, Beer-Sheva 84190, Israel a shmulikb@bgu.ac.il, b lomberg@bgu.ac.il, c nfrum@bgu.ac.il, d nfrage@bgu.ac.il Keywords: Calcium Fluoride, Ge, Ga, Wetting, Interface Abstract.
Introduction Calcium fluoride is a stable compound with high heat of formation, has a relatively high melting point and therefore can be a candidate material for liquid metals container or crucible.
Naidich: Journal of Materials Science Letters "The Nonwettability Behavior of Solid Substrates in Contact with Chemical Active Reach Ti-, Zr-, and Hf- liquid alloys", vol. 17, 1998
Devet "Wettability at High Temperatures", Pergamon Materials Series 1999
Online since: September 2013
Authors: Jia Xiong Xu
Introduction Asphalt mixture of uniaxial compression test is an important way to evaluate performance of the pavement materials, the compressive strength will directly affect the accuracy of the design of pavement structure and material, which affects the actual performance of asphalt pavement.
Finite element method is a modern method of calculation with the rapid development of modern science and technology[1].
Finite Element Analysis of Stress-strain Data Application of ratio of diameter to height 1:1 end 2.1 numerical simulation of untreated end surface As shown in table 1, numerical simulation of nonlinear material properties uses the true stress and strain values.
By the analysis of ANSYS finite element software, the end does not handle the specimen strain data as the material model parameters, the ratio is 0.95
Journal of Highway and Transportation Research and Development, 2007, 24(8):1-6.
Online since: February 2013
Authors: Xin Wang, Z K Feng, R Z Gong, Ding Wei
FeSiAl powder core coated by Ba-B-P-O system insulating layer Ding Wei1, a, Wang X 1,b※, Feng Z K1,c and Gong R Z1,d 1School of Optical and Electronic Information, Huazhong University of Science & Technology, China aDing.Wei@smail.hust.edu.cn, bwangx@mail.hust.edu.cn, cfengzekun@mail.hust.edu.cn, drzhgong@mail.hust.edu.cn Keywords: soft magnetic composites, barium, permeability, DC property, core loss Abstract Sendust soft magnetic composites coated by a thin Ba-B-P-O system insulating layer were produced; SEM spectroscopy and Energy dispersive X-ray analysis spectroscopy confirmed that thin layers of Ba-B-P-O system covered the alloy powders.
These component materials offer several advantages over traditional laminated steel and soft magnetic ferrite cores in some application.
Insulating materials may be divided to organic and inorganic materials, phosphate system insulation has been concerned due to its high electrical resistivity, oxidation resistance and also it does not influence the consolidation behavior of soft magnetic powders [6, 7].
Janghorban: Journal of Materials Processing Technology Vol.189 (2007), p. 1 [2] A.H.
Abiri: Materials and Design Vol.30 (2009), p. 3989
Online since: December 2012
Authors: Yan Hui Wang, Shu Xian Du
The basic structure of knit textile is shown in Fig. 2, on this basis, changes in interweaving techniques and materials can present the unexpected appearance of the fabric.
Fiber Beauty The rise of Fiber Art has evoked curiosity in and exploration to materials, and has also inspired the innovation of textile fabrics.
Based on original fabric, we can create various patterns by reconstructing fabric texture with using fiber’s feature such as goose pimple of virgin fabric, nub yarn of linen fabric and slub yarn, or adding other materials in sharp contrast with the original ones.
Fig.3 Materials of different thickness are interweaved together to bring about some visual effect that are never tiring.
[3] Xubaijia:Journal of Suzhou University (Engineering Science Edition).2006.10, volume 26(5), p. 124-140.