Search results

They are hard to solve because of their geometric and material nonlinearalities.
further enhanced and applied the method in several areas, such as the combination of parametric programming method and iteration algorithm for the analysis of elastic or elastic-plastic contact problems [9, 10], the parametric variation principle used for coupled analysis of liquid and solid interaction occurred in saturated and partially saturated porous media [11,12], the implementation of gradient dependent model adopted for the strain localization analysis of the materials [12,13], the local and multi-scale analysis of periodic composite materials with mirco-construction of elastic or inelastic cohesive granular bodies [14,15], the mixed energy method for solution of quadratic programming problems and elastic-plastic analysis of truss structures [16], and the non-interior smoothing algorithm for frictional contact problems [17].
Wu: Parametric Variational Principle and Its Applications in Engineering (Science Press, Beijing 1997)
Schrefler: European Journal of Solid Mechanics-A/Solids Vol. 19 (2000), P.503 [13] H.W.
Schrefler: Mechanics of Composite Materials and Structures Vol. 7 (2000), p.355 [16] W.X.

Korsunsky 3 and Svetlana A.Barseghyan1 1 Institute of General and Inorganic Chemistry, National Academy of Sciences, 2-tup, 10 Argutyan Street, 375051 Yerevan, Armenia 2 Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK Keywords: Mechanical Alloying MA, Metallic Coating, Solid-State Chemistry, Tribology, Wear ABSTRACT A novel approach for metal surface modification and finishing is proposed and developed based on the in situ mechanochemical processing of metal oxides in reducing media.
Hardness of the coating was chosen as a key property, since it is indicative of the work-hardened state of the material in the layer, the grain size and hence the coating strength.
In this process the surface of material is bombarded by the peening medium consisting of a stream of hard rounded particles, which induce localized plastic deformation at the site of impact.
Two materials were used for substrate, an A1 aluminum alloy (UNS number A91100), and a low carbon steel (UNS number G10100).
Kazaryan, A.R.Torosyan, Armenian Chemical Journal, 21(5) (1997), p.65

Orthogonal Experiment Study on the Hydrogen Desorption Properties of NaAlH4 and LiAlH4 Zheng Xueping1, a, Feng Xin2,b , Lin Xiaobin and Liu Shenglin3 School of Materials Science and Engineering, Chang’an University, Xi’an 710061, China aemail: zxp2004b@yahoo.com.cn, bemail: fixer308849846@yahoo,com.cn Keywords: Orthogonal experiment; NaAlH4; hydrogen desorption; ball-milling Abstract.
One of the most promising materials has been metal hydrides, but they have long suffered from poor hydrogen weight density.
The materials were characterized by pressure-composition-temperature (PCT) apparatus which can be operated up to 6 MPa and 400°C.
Acknowledgements This work is supported by National Natural Science Foundation funded projects (50806007).
International Journal of Hydrogen Energy , 2005, 30(13-14):1413-1416

The raw materials of Basalt is Basalt ore which is the formation of condensed volcanic rock.
Journal of southeast university.31 (2001) 1-5.
Basalt continuous fiber material properties and its application ,J.
Basalt fiber material performance and application, J.
Science and technology information of hei long jiang. 20 (2009) 35.

Specialized materials such as High Performance Concrete (HPC) could represent a viable convenient solution for repairing, strengthening and retrofitting of RC structures as both structural capacity and durability can be refurbished.
Restrained shrinkage cracking, particularly significant in repaired structures where the existing concrete generates a considerable restraint against the free movement of the repair material, may represent a limit to the effective application of these materials.
Material Modeling.
Material Properties The substrates are made using a NSC class C25/30 according to Eurocode 2 [6].
Miltenberger, Shrinkage Cracking Characteristics of Concrete Using Ring Specimens, ACI Materials Journal, 100 (2003), 239-245

An Experimental Research and Analysis of the Law of Explosive Stress Wave Propagation of Cylindrical Charge Xiangyang Jiang1,a,Shilong Yan1,b ,Wei Liu1,c 1 Anhui University of Science and Technology, Huainan 232001 Anhui China a jxy0907@live.cn, bslyan@aust.edu.cn, cwliu@aust.edu.cn Key words: cylindrical charge, explosion mechanics, explosive stress wave.
The material of rock owns the performances of nonuniformity, nonelasticity and anisotropy, which cause it a complex physical and mechanical process.
Those are obtained through testing of material testing machine and CTS-25 nonmetal supersonic test meter.
(1. strain brick; 2.blockage; 3.cylindrical charge; 4.cement mortar specimen; 5.SDY2107A super dynamic strain instrument; 6.TST3406C dynamic test analyzer; 7.computer) Fig.2 Schematic diagram of blasting strain wave measuring device (Unit mm) The embedded strain brick’s material and ratio is the same as that of concrete specimen so that their wave impedances are the same.
Chinese Journal of Rock Mechanics and Engineering，2009，28（10）：1945~1968

In view of the characteristics of online learning, when organize students learn materials, select5 kinds of media way of text, images, animation, audio and video.
System helps to analyze the cause, and tips to use video, animation, etc. in learning, adopts more visual media forms in order to make the organization of the teaching materials given priority in visual form.
Chinese web page classification based on the combination of vector machine (SVM) and unsupervised clustering [J] Computer Journal, 2001 (1) : 62-68 [2] Yang Hui, Wang Lu, Feng Hong.
Computer Science, 2008, 35 (5) : 292-297 [5] M.

Chemical Engineering School of Nanjing University of Science and Technology, Nanjing Jiangsu 210094 2.
For example, the sensitive housefly raised in the laboratory can be used as the measuring material, the poisoning degree after contacting the measured samples is used to represent pesticide residues of the samples, the inhibited degree of pathogen growth is used to detect pesticide residue, and the inhibited degree of corn or other indicative plants is used to detect the sulfonylurea herbicide residue in soil.
But the carrier gas of gas chromatography has no influence on distribution, which means that in liquid chromatography, there are two phases which have selective interaction with samples. ② Liquid chromatography has many types of packing materials with unique efficiency, which makes the selection of stationary phase greater and increases the possibility of separation. ③ Liquid chromatography uses low separation temperature, the interaction between molecules is more effective in low temperature, so reducing the temperature can improve the efficiency of chromatographic separation
In many situations, liquid chromatography can be used as an analysis method and a separation method to purify and prepare single material with medium purification.
[4] Teng Jun, Dispersive liquid-liquid microextraction- gas chromatography determining organophosphorus pesticide of gastric content [J], Chinese Journal of Industrial Medicine, 2009,05:385-386+394.

Introduction The injection stretch blow moulding (ISBM) process which is managed at a temperature near or slightly above the glass transition temperature Tg involves multiaxial large strains at high strain rate of the polyethylene terephthalate material (PET).
Identification of the Material’s Properties One can first identify the initial shear modulus G0 from the initial slope of the global experimental strain-stress curves which were carried out by Menary et al. [3].
International Journal of Non-linear Mechanics, 44, 389-395, (2009)
[2] Luo Y.M., Chevalier L., Monteiro E., Identification of a Visco-Elastic Model for PET Near Tg Based on Uni and Biaxial Results, The 14th International ESAFORM Conference on Material Forming, Queen’s University , Belfast, Irlande du Nord, April 27-29, 2011
Polymer Engineering & Science, in press

Using resin for the sensor material reduces the processing cost compared with conventional MEMS processes.
The resin material used this time was PC (polycarbonate) which has good adhesion to the thin Cu film.
Hattori: Electrostatic Capacity Type Micro Inclination Sensor Utilizing Dielectric Nano-Particles, Proceedings of the International Symposium on Micro-Nanomechatronics and Human Science, Nagoya, Japan, pp. 545-556(2006) [6] H.
Hattori: Precise Micro Pattern Replication by Hot Embossing, JSME International Journal, Vol. 49, No.1 pp. 69-73(2006) [9] K.
Hattori: Surface Modification and Direct Bonding of Different Materials Irradiated H2O Ion, Jornal of Advanced Mechanical Design Systems, and Manufacturing, Vol.2, pp.197-202(2008) [10] H.