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Online since: May 2012
Authors: Qing Jun Chen, Jian Cai, Xu Lin Tang, Chun Yang, Jin Long Guo, An He
The Concrete01 material, which is used for constructing a uniaxial Kent-Scott-Park concrete material object with degraded linear unloading/reloading stiffness and no tensile strength, is adopted for simulating the concrete.
The Steel02 material, which is used for constructing a uniaxial Giuffre-Menegotto-Pinto steel material with isotropic strain hardening, is adopted for simulating the steel.
The parameters of these two materials come from the experiment results; the strain-hardening radio of the steel is 0.0232.
Acknowledgement The Project was supported by Guangdong Provincial Natural Science Foundation of China (Grant No. 9451064101002910) and the Fundamental Research Funds for the Central Universities (Grant No. 2011ZM0112, 20092M0230) and was supported by State Key Lab of Subtropical Building Science (No. 2011ZC25, 2011ZC28).
China Civil Engineering Journal 42:12, 33-42
Online since: January 2021
Authors: Paul W. Cleary, Anthony B. Murphy, Dayalan R. Gunasegaram, Vu Thua Nguyen, Gary W. Delaney, Sharen J. Cummins, Peter S. Cook, Mark J. Styles, Matt D. Sinnott
Baker (Ed.), TMS 2017 146th Annual Meeting & Exhibition Annual Meeting Supplemental Proceedings, The Minerals, Metals & Materials Series, 2017, pp. 91-102
[12] FLOW-3D: Version 11.1.1.3, Flow Science Inc, Santa Fe, NM, USA [13] P.W.
Elder, Phase field methods in Material Science and Engineering, Wiley-VCH, Weinheim, 2010 pp.1-7 [22] N.
Chen, Phase field methods, in Multiscale Paradigms in Integrated Computational Materials Science and Engineering, ed.
Michaleris, Thermomechanical modeling of additive manufacturing large parts, Journal of Manufacturing Science and Engineering, 136 (2014) 1-8
Online since: November 2012
Authors: Ning Hui He, Guang Rong Bian, Hong Sheng Li
Users can dynamically monitor the location and whereabouts of material, operating machinery and vehicles in warehouse by intelligent terminal.
There is a fixed reader placed on each shelf of the warehouse for monitoring each tray on the shelf which can read real-time inventory information in the tray on the label with updating the database management system to confirm the material storage.
References [1] Dong Yaohua,The Internet of Things Technology and Applications, Shanghai: Shanghai Science and Technology Press, 2011 , pp.174-264
[2] Wu Dongcheng,Principle and Application of Intelligent Wireless Sensor Network, Beijing:Science Press, 2011.12, pp.203-205
[7] Pablo GARCÍA ANSOLA, Andrés GARCÍA, Javier de las MORENAS, Javier GARCÍA ESCRIBANO , Francisco Javier OTAMENDI, ZigID: Improving visibility in industrial environments by combining WSN and RFID, Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2011, pp.849-859.
Online since: June 2010
Authors: Li Bo Zhou, Jun Shimizu, Takeyuki Yamamoto, Han Huang
This study aims to clarify the friction and wear phenomena, which are of great importance in abrasive machining with atomic-scale material removal, such as polishing of magnetic disk substrates and CMP of semiconductor substrates.
It is thus important to understand the material removal, the friction and the wear mechanism at atomic-scale with extremely small abrasive grains, in order to reach the surface quality requirement for such ultra-precise devices.
Robbins: Science, Vol. 284 (1999), p. 1650 [3] L.
Eda: Tribotest Journal, Vol. 9 (2002), p. 101 [9] J.
Manufacturing Science & Technol.
Online since: July 2011
Authors: Wen Juan Zheng, Hai Tao Zheng, Pu Liu, Shinichiro Suye, Xing Sheng Wang, Hui Hu
Carboxylic groups were firstly introduced to MWCNTs by oxidation in a mixture of sulfuric acid and nitric acid, and the NAD moistures were further attached by the formation of amide bonds with carboxylic groups under the help of 1-ethyl-3-(3-dimethyl-aminopropyl)carbodiimidehydrochloride and N-hydroxysuccinimide, which resulted in the coenzyme functionalized materials, MWCNTs-NAD.
In recent years, the electrochemical oxidation of NADH on electrode modified by nano-materials, especially carbon nanotubes (CNTs), received great interest.
In this article, a coenzyme functionalized material (MWCNTs-NAD) was prepared by linking NAD+ to the surface of MWCNTs.
Materials apparatus Multi-walled carbon nanotubes (MWCNTs) were purchased from Beijing Nachen S&T Ltd., and NAD+, NADH, NAD-dependent alcohol dehydrogenase (ADH, EC: 1.1.1.1 from Saccharomyces cerevisiae, 450 U mg-1), 2-(N-morpholino) ethanesulfonic acid (MES), N-ethyl-N’-(3-dimethyl-aminopropyl) arbodiimideydrochloride (EDC), and N-hydroxysuccinimide (NHS) were obtained from Sigma.
China and Natural Science Foundation of Tianjin (No.06YFJMJC15 000), P.
Online since: May 2011
Authors: Y. Cinar, M.A. Knackstedt, W.V. Pinczewski, O.A. Olafuyi
Advances in extracting representative networks from micro-CT images of porous materials have improved the predictive capabilities of network models [2,3].
Averdunk, Techniques for image enhancement and segmentation of tomographic images of porous materials, Physica A 339(1-2) (2004) 166-172
Journal of Irrig.
Soil Science, 1980
Journal 44 (2005) 892-898.
Online since: August 2014
Authors: Marian Šofranko, Marek Laciak
For the dynamic crushers, the material is crushed by a strike (hammer crushers) or the material itself is projected at high speed on the impact surface (impact crushers).
Material flow – shows the flow of material in designed technological line.
Possibility of extending the application is the implementation of a mathematical model that calculates the material flow of the treated material.
ACKNOWLEDGMENT This work was supported by the Slovak Grant Agency for Science under grants VEGA No. 1/1206/12, No. 1/0729/12, No. 1/0295/14.
Virgala, Modeling of Dynamic Systems in Simulation Environment MATLABSimulink – SimMechanics, American Journal of Mechanical Engineering.
Online since: August 2017
Authors: Seung Jo Lee
To evaluate the freeze-thaw resistance of the specimen, a 100×100×400mm prismatic specimen was manufactured, and it was cured in water for the material age of 28 days.
For mixing the high-performance concrete, a fan-type mixer with the capacity of 80 liters was used, and the constituent materials were separately and uniformly injected in the (cement+fine aggregate)→(water+AE agent)→(coarse aggregate+viscosity agent) stages, as summarizes in Table 4.
Table 1 Chemical composition and physical properties of binders Chemical composition (%) Physical Properties - SiO2 Al2O3 Fe2O3 CaO MgO SO3 K2O Ig.loss Density (g/cm3) Cement 21.5 6.5 3.1 62.3 2.9 1.9 0.32 1.3 3.15 Fly-ash 58.2 22.29 7.27 - 1.1 0.3 - 5.2 2.3 Type of fiber Density (g/cm3) Tensile strength (MPa) Elasticity modulus (MPa) Shape ratio (%) Diameter (μm) Length (mm) Nylon 1.15 896 4500 - 12 6 Polypropylene 0.91 325 3400 - 20 6 Table 2 Physical properties of polypropylene and nylon, steel fiber Table 3 Physical properties of an aggregate Types Density (g/cm3) Size (mm) Unit volume weight(kg/m3) Absorption Void Solid volume Fineness modulus (%) Sand 2.61 5 1578 1.04 44 51 2.75 Gravel 2.63 10 1582 0.9 41 47 6.33 Table 4 Mixing properties composition of W/B ratios and materials Specimens W/B (%) FA (%) Air (%) Ny (%) PP (%) S/A (%) Materials (kg/m3) C FA V Sand Gravel Agent (%) Water GC 30 - - - 43 540 - - 713 683 0.9 160 N-1 0 4.6 0.7 43 483 - - 740 675
Acknowledgment “This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF-2014R1A1A2059498) funded by the Ministry of Education, Science and Technology” References [1] A.M.
Williams: Influence of Calcium Compounds on the Mechanical Properties of Fly Ash and Geopolymer Pastes [J], Journal of Hazardous Materials, 2009, 167, Issues 1-3, 82-88
Online since: September 2010
Authors: Viktor Orosz, Csilla Paróczai, István Kocserha, Robert Geber
Examination of tile industrial usability of high-quartz content clay Viktor Orosz1,a, István Kocserha 1,b, Róbert Géber 1,c , Csilla Paróczai2,d 1 Department of Ceramic and Silicates Engineering, Faculty of Materials Science and Engineering, University of Miskolc, Miskolc-Egyetemváros, H-3515 Hungary 2 Tondach Hungary Ltd.
Introduction Modern building solutions demand permanent and good quality building materials such as bricks with excellent heat insulation and freeze-proof roof-tiles [1,2,3].
The quality of the raw materials used play a key role in the success of the final product besides the developing of production processes [4,5].
Higashi: Journal of the European Ceramic Society Vol. 24.
Grant Norton: Ceramic Materials Science and Engineering, Springer science+Business Media, LLC, 2007 [6] F.
Online since: August 2013
Authors: Zhen Lin Chai, Jie Yuan, Jian Ming Ling, Shi Chang Chen, Yong Luo, Li Guo Zhu
Recommended Value of Material Design Parameters.
Cleavage strength and compression rebound modulus are the main material design parameters.
References [1] Liangcai Cai, Yonggen Wu, Qingtao Liu, Compounding and Application of Airport Pavement Recycled Concrete, Journal of Air Force Engineering University (Natural Science Edition), 2009, 10(5):1-4
[3] Chao Zhang, Jizhong Ding, Jinsheng Guo, Use of scrap concrete materials in semi-rigid base-course, Journal of Xi’an Highway University, 22(5):1-4
[7] Xiaona Liu, Recycled Use of Cement Stabilized Macadam Structural Materials of Road Base, Chengdu University of Technology, Sichuan Province, 2007