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Online since: August 2004
Authors: Joon Hyun Lee, Sang Woo Choi, Seung Hyun Kang, Bo Young Lee
The large number of thermal cycles with great amplitude produced by stratification raises some concerns about the damage induced by fatigue in these lines.
In addition, spurious signals scattered from various points of the crack surface and other sources such as micro cracks, inclusions and grain boundaries, will form a noisy background, which will interfere with the diffraction measurements [5].
Online since: August 2011
Authors: Hai Jing Huang, Zu Wu, Li Hui Zi Zhi
Suspension structure: Stylist get inspiration from grain to developed a new structure form - suspension structure.
Humans usually developed elements by using a large number of elements and got very complex experiment.
Online since: May 2005
Authors: Peter J. Wellmann, Z.G. Herro, Sakwe Aloysius Sakwe
Consequently, during etching of SiC single crystals at optimum conditions only the strained areas due to defects such as dislocations, micropipes, low and large angle grain boundaries, twin boundaries etc. are preferentially etched to produce etch pits or profiles with definite configurations.
Acknowledgements Financial support was provided by the German Science Foundation (DFG, contract number WE2107) and the Bavarian Research Association (BFS).
Online since: July 2007
Authors: Wolfgang Sand, Carlos A. Jerez, Lina María Ruíz, Alex Gonzalez, Marine Frezza, Laurent Soulère, Yves Queneau, Alain Doutheau, Nicolas Guiliani, Thore Rohwerder
This assay is based on the reduction of the number of planktonic cells in the solution due to the attachment of the bacteria to a mineral sulfide substratum [3,6].
Ground FeS2 was wet sieved to a grain size of 50-100 µm (Test sieves, Retsch, Germany).
Online since: December 2009
Authors: Takaaki Tsurumi, Hiroaki Takeda, Kensuke Mihara, Takuya Hoshina, Hirofumi Kakemoto
., LTD, BT-05, grain size: 0.5um) was used as a raw powder for the film deposition using ADM.
Akedo ; Material Science Form, 449, 43 (2004) E-mail: mihara.k.aa@m.titech.ac.jp Fax Number: +81-3-5734-2514
Online since: October 2010
Authors: Rui Jiang, Ning Bo Liao, Miao Zhang
A large number of stress vs. crack opening data points measured at different locations and times are obtained during the steady-state crack propagation of each MD run.
To solve this problem, Yamakov [27] developed a MD model for crack propagation under steady-state conditions to analyze intergranular fracture along grain boundary in aluminum firstly, then the results from the MD simulation are recast to obtain an average continuum through the definition of a Cohesive-Zone-Volume-Element—an atomistic analog to a continuum cohesive zone model element.
Online since: October 2010
Authors: Hai Ning Lv, Cheng Qian
On the other hand, polypropylene woven fabrics also has disadvantages, such as low water permeability in horizontal direction, low porosity and pore shape changing easily, thus is difficult for obstructing fine soil grains passing.
Thus numbers of expanded molecular chains in PP filament are lower than those of in the PP ribbon-like filament, which makes molecular chain shrink more severely in the former and led to its bigger shrinkage.
Online since: September 2011
Authors: Yong Zhuo Huangfu, Yong Kang Zhang, Xu Dong Ren, Liang Ruan
LSP can improve the mechanical property and fatigue life of specimen, because laser shock waves make the specimen surface produce elastic-plastic deformation and high residual stress, high-density dislocation and grain refinement, etc.
(b) was the high magnification image of (a), and a small number of pores were seen from crack initiation.
Online since: May 2011
Authors: Gang Xu, Qing Wang, Hong Fang Fei, Yi Min Wang
Material and Mechanics Capability. (1) cement: three gorges brand P.C 32.5 composite silicate cement;(2) Water: tap water; (3) Sand: fine sand of gradation III with fineness modulus of 1.86; (4) Stone: detritus ,the most grain diameter is 16mm, continuous gradation; (5) Steel: 14mm HPB235 round, HRB335 deformation and 316 stainless steel with 14mm diameter; (6) Concrete mixture design and compressive strength of concrete cube are shown in following table 1.
W=MQ/nF=KIt (1) In Eq. 1, W is the corrosion amount of metal in time t, g; M is the molar mass of iron, 56g/mol; I is current intensity, A; t is the electrified time, s; F is the Faraday constant, 96485.3383 ± 0.0083Cmol-1; n is the metal oxidation number of electrons lost in the process; K is the electrochemical equivalent for the metal; Q is the electric quantity through metal in the time t, C.
Online since: December 2010
Authors: Hai Fang Xu, Cheng Zhang, Dan Yu Jiang, Bing Xu, De Xin Huang, Ping Ping Wu
Rod-like grains exist in GJ-ІІ glass surface after testing in UGW at 150°C, with the composition of primary SiO2, a few Na2O and Al2O3 and traces of Fe3O4.
Acknowledgements This work is supported by Foundation of Science and Technology Commission of Shanghai Municipality (No. 09DZ0502200); and Shanghai Leading Academic Discipline Project (Project Number: J51504).
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