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Online since: February 2012
Authors: Guo Qin Liu, Lin Li, Bing Li, Lei Zhao
Both cereal proteins (e.g. corn zein, wheat gluten, soy) and animal proteins (e.g. dairy, collagen, gelatin and myfibrillar proteins) are commonly employed to produce agricultural packaging materials[1].Wheat gluten may be a candidate to replace synthetic polymers in many non-food applications because of its unique viscoelastic properties and the ease with which its heterogeneous primary structure can be modified.
Recent research has showed that modification of wheat gluten with a tri-thiol additive can toughen the otherwise brittle wheat gluten material [4].
Ultrasonic method has been attracted more and more interests in food, material and chemical industry.
Materials and Methods Materials.
Journal of Food Engineering.
Online since: May 2011
Authors: Xin Ding Wang, Qiu Hua Tang, Xiao Qing Zeng
Nonlinear Finite Element Analysis of Concrete Continuous Beams with External CFRP Prestressed Tendons Xiao-qing Zenga, Xin-ding Wangb and Qiu-hua Tangc Transportation College, Southeast University, Jiangsu, Nanjing, 210096, China azxqgwy@163.com, bxdwang66@163.com, cqiuhua87@126.com, Key words: External Prestress, Carbon Fiber Reinforced Polymer Prestressed Tendon, Concrete, The Increment of Stress, Deflection.
The performance parameters of materials are showed in Table1.
A-A Section B-B Section C-C Section D-D Section Fig.1: The simple drawing of experimental beams under loading (all dimensions in mm) Comparison of the performance parameters of various materials Table1 Material name Poisson ratio Elastic modulus [MPa] Tensile strength [MPa] compressive strength [MPa] Tension [MPa] Linear expansion coefficient concrete 0.2 3.0×104 2.01 20.1 — 1.0×10-5 Φ16 0.3 1.95×105 540 — — 1.2×10-5 Φ10 0.3 1.95×105 540 — — 1.2×10-5 CFRP 0.17 1.39×105 1868 — 747 4×10-6 When the ANSYS simulates concrete compressive strength, it generally not considered crushing of material.
Carbon fiber reinforced plastic materials only need to enter the elastic modulus, considering as linear elastic material.
Journal of Civil Engineering, 1999(4): 37-44 [6] Xin-ding Wang.
Online since: October 2015
Authors: Anwar Mohammed Parvez, Wael Elleithy, Jia Hao Aw
Effect of Footfall Induced Vibration on Footbridges Aw Jia Hao1,a, Mohammed Parvez Anwar1,b and Wael Elleithy1,c* 1,2,3Department of Civil Engineering, University of Nottingham Malaysia Campus Selangor 43500, Malaysia akeex4ajo@nottingham.edu.my, banwar.parvez@nottingham.edu.my, cwael.elleithy@nottingham.edu.my Keywords: footfall, concrete footbridges, composite footbridges, finite element modelling, dynamic response Abstract.
Lighter materials are used in footbridges due to improved mechanical characteristics of materials, making the structures adaptable to modern and slender designs.
Step frequency is one of the key parameters in estimation of bridge vibration.
The agreed set of damping ratio for different materials used in construction industry was suggested by Bachmann et al., where steel and reinforced concrete having damping ratio of 0.2% and 0.8% respectively [9].
Any further increase in slab thickness results in higher mass and more construction materials to be used with insignificant reduction in dynamic response.
Online since: December 2011
Authors: Ivan Gutierrez-Urrutia, Dierk Raabe
Introduction Advanced metallic materials commonly exhibit several deformation mechanisms resulting in complicated deformed microstructures.
Averaged engineering strain values were retrieved from the corresponding strain maps and used to calculate the true stress-strain values.
These can only cross slip after stress- and thermally assisted local recombination, hence the planar slip prevalence in materials with low stacking fault energy.
Hirsch, Electron diffraction based techniques in scanning electron microscopy of bulk materials, Micron 28 (1997) 279-308
Crimp, Scanning Electron Microscopy Imaging of Dislocations in Bulk Materials, Using Electron Channeling Contrast, Microscopy Research Technique 69 (2006) 374-381
Online since: March 2015
Authors: Thomas Vincent
Influence of Prestress on Axial Compressive Behavior of High-Strength Concrete-Filled FRP Tubes Thomas Vincent1,a 1School of Civil, Environmental and Mining Engineering, The University of Adelaide, Adelaide, South Australia, Australia 5005 atvincent@civeng.adelaide.edu.au Keywords: Concrete; High-strength concrete; Fiber reinforced polymer (FRP); Confinement; Concrete-filled FRP tube (CFFT); Columns; Stress-strain relations; Prestress.
Initially a summary of the test program is provided followed by a comparison of the axial stress-strain responses, finally a discussion on the influence of the key parameters is provided.
Test Program Test Specimens and Materials.
[4] Karabinis, A.I. and Rousakis, T.C. (2002) "Concrete confined by FRP material: a plasticity approach."
[25] Ozbakkaloglu, T. and Louk Fanggi, B. (2013) "FRP-HSC-steel composite columns: behavior under monotonic and cyclic axial compression" Materials and Structures. doi: 10.1617/s11527-013-0216-0
Online since: October 2014
Authors: Gunther Reinhart, Vanessa Schmidt, Markus Graßl
Currently, the EU Commission is deciding on restrictions in the usage of energy and auxiliary materials to support the reduction of environmental impact in machine usage [4].
Following [11, 12], resources are natural resources, i.e. renewable and non renewable primary raw materials, physical space, environ-mental media, flow resource, and biodiversity.
Material is raw material, consumables and auxiliaries as well as unfinished goods.
Other challenges, which need to be solved subsequently, include the development of key performance indicators.
Proceedings of IMECE2004, ASME International Mechanical Engineering Congress and RD&D Expo, Anaheim CA, 13.-19.
Online since: July 2013
Authors: Ji Hai Zhang, Fan Ren
Only analyzing the reliability of its supply chain through scientific method and finding out the key evaluation indexes can experts take proper measures to optimize the oil logistics network as well as to improve the whole supply chain’s reliability.
In recent years, the problem of supply chain reliability has been paid more and more attention because of demand uncertainty, especially after Wen Chuan Earthquake in which there are many supply chain problems about material distribution under emergency.
Yuanhong Liu, Ming Luo and Zhongying Liu defines reliability from the view of reliability engineering theory as the magnitude of trouble-free working ability of supply chain system, referring the capability to normally run within certain time in perfect competitative market [2].
Third, find out the key indicators and establish the evaluation index system.
Online since: September 2014
Authors: Yong Mei Yu, Yun Bo Xu, Feng Fang, Yang Wang, Xiang Lu, Guang Ming Cao, Cheng Gang Li, Y.X. Zhang
Research on the abnormal grain growth of Goss grains in strip-cast 4.5%Si grain-oriented electrical steels Yuanxiang Zhang1, a, Feng Fang1, Yunbo Xu1, Yang Wang1, Xiang Lu1, Guangming Cao1, Chenggang Li1, Yongmei Yu2 1 The State Key Laboratory of Rolling & Automation, Northeastern University, Shenyang 110004, China 2 School of Mechanical Engineering, Shenyang University of chemical technology; 11street, shen yang economical&technological development area, Shenyang, liaoning 110142, P.R.China aredyuanxiang@126.com Key words:twin-roll strip casting; grain-oriented 4.5%Si steel; secondary recrystallization; texture; magnetic properties Abstract.
Introduction The grain oriented silicon steel with high permeability and low core loss is an idea material for electrical device.
Online since: November 2014
Authors: Long Zhe Jin, Xiao Dong Song
Application Model Analysis on Automatic System of Fire Detection, Alarming and Extinguishment in Crude Oil Storage Tank Song XiaoDong 1, aJin LongZhe 2, b 1,2 School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China a,bsongxiaodong828@sohu.com Keywords: Fire automatic monitoring system, crude oil storage tank, model, PNN Abstract.
Introduction The paper carries out safety evaluation research on crude oil tank farm and transformation of key technology.
It sets up flame detection material and temperature probe in the interior crude oil storage tank and establishes flame probe on the top of storage tank.
Conclusion This paper carried out renovation work on the crude oil tank farm safety evaluation research and key technology, presents a multi sensor fire detection model, including that fire feature combination selection module, training module and fire supervision and detection module.
Online since: June 2009
Authors: Shinya Tsukamoto, Kazuhito Ohashi, Y. Sumimoto, Y. Fujita
The loaded wheel by grinding of difficult-to-cut materials has been generally considered as same as ones whose cutting edges worn out, and its grindactivity has been recover by dressing [5].
The loading chips are mechanically removed with abrasive grains and bonding materials from the wheel surface by dressing, and abrasive grains under the previous wheel surface show up.
Yasunaga: Tool Engineer Vol. 35 (1991), p 49 (in Japanese) Fig. 9 Variations of Surface roughness in grinding process Fig. 8 Variations of grinding current in grinding process [2] K.
Tsukamoto, Key Eng.
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