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Online since: September 2013
Authors: Zbyněk Sucharda, Radek Sedláček, Tomas Suchy, Miroslav Sochor, Karel Balik, Josef Šepitka
Characterization of the Interphase in Carbon Fiber Reinforced Polymeric Composite by a Modulus Mapping Test Zbyněk Sucharda1,a, Tomáš Suchý1,2,b, Radek Sedláček2,c, Karel Balík1,d, Josef Šepitka2,e and Miroslav Sochor2,f 1Department of Composites and Carbon Materials, Institute of Rock Structure and Mechanics, ASCR, v.v.i., V Holešovičkách 41, 182 09 Prague 8, Czech Republic 2Laboratory of Biomechanics, Department of Mechanics, Biomechanics and Mechatronics, Faculty of Mechanical Engineering, Czech Technical University in Prague, Technická 4, 166 07, Prague 6, Czech Republic asucharda@irsm.cas.cz, bsuchyt@irsm.cas.cz, cradek.sedlacek@fs.cvut.cz, dbalik@irsm.cas.cz, ejosef.sepitka@fs.cvut.cz, fmiroslav.sochor@fs.cvut.cz Keywords: nanoindentation, modulus mapping, interphase, sterilization, polymeric composite Abstract.
These effects may greatly alter the physical, chemical and mechanical properties of the material at different scales [1].
Materials and methods Composite samples consisting of unidirectional carbon fibers (T300 fibers, 7 mm in diameter, Toray, Japan) and PDMS matrix (Lukosil M130, Lučební závody Kolín, CZ) were prepared by in-situ impregnation and cured by block polycondensation step by step up to 250°C for 25 hours (130°C/5h, 150°C/5h, 190°C/5h, 210°C/5h and 250°C/5h).
Acknowledgements This study was supported by the Czech Science Foundation under project No.
Morgan, Synergistic thermal-moisture damage mechanisms of epoxies and their carbon fiber composites, Journal of Composite Materials 27 (1993) 1465-1478
Online since: January 2020
Authors: Yue Zhou, Jing Ma, Juan Lin, Kai Feng Wu
Generally, for coating materials with low infrared emissivity, the infrared reflectivity will be relatively high, thus radiation reflected by skin will increase[2].
The aircraft skin coating is divided into five different parts, the infrared reflectivity of the coating material is set to M1, M2, M3, M4 and M5.
The long-wavelength infrared reflectivity of all coating materials is preferably higher.
Aerospace Science and Technology, 2016: S1270963816302693
Journal of Aircraft, 2013, 50(1):103-113
Online since: February 2013
Authors: Gui Fu Ding, Xiao Lin Zhao, Ya Wang, Yu Zheng
Introduction As a common functional material, glass is widely appliedin MEMS.
Choosing appropriate mask material to form selective protection for glass substrate is the most significant link in elaborate processing technology, also one of the important technical problems to be overcome.
Experimental Progress Choice of Mask Materials.E.Belloyfirst put forward a 0.5 mm thick metal mask structure by using the laser cutting.
[3] Gabrielle A, Sayah A, et al, Precision Poly-(DimethylSiloxane) Masking Technology for High-Resolution Powder Blasting, Journal of Microelectro Mechanical Systems. 2005, 14 (3): 619-624
[5] Kanno M, Honma T, Komatsu T, Effect of chemicaletching on the surface morphology of laser-patterned lines with Er3+-doped CaF2nanocrystals in oxyfluoride glass, Materials Research Bulletin. 2009, 44 (11): 2143–2146
Online since: May 2012
Authors: Xu Yang, Xiao Wei Wang, Wen Zhe Li
Livestock Manure of culturing farm is good biomass materials.
With development and utilization of bio-energy, rural biomass materials culturing farm is attracting more attention.
Materials and Methods Description of the Constructed Wetland System.
Acknowledgment The research was upported by the China postdoctoral science foundation (No.20110491020), Heilongjiang postdoctoral funds (No.
Irshad,: Journal of Environmental Management.
Online since: April 2009
Authors: Roman Kolano, Jacek Salach, Adam Bieńkowski, Roman Szewczyk
From the practical point of view, the magnetoelastic properties of the material may be described by both B(H)σ and B(σ)Hm characteristics, which represent the influence of stresses on magnetic hysteresis loops of the material, for both quasi-static and dynamic magnetization [3].
On the other hand, the magnetic properties of these materials also change, as the function of temperature of the core.
This work was supported by Polish Ministry of Science and Higher Education within research grant PBZ-KBN-115/T08/04.
Szewczyk: Journal of Automation, Mobile Robotics and Intelligent Systems, Vol 1. (2007), p. 66
O'Handley: Modern magnetic materials - principles and applications (John Wiley & sons, 2000)
Online since: February 2008
Authors: Jia Chen Liu, Shun Li, Bing Zhou, Wei Jing, Zhong Qiu Li
Microstructure and Thermal Shock Resistance of LaPO4-ZrO2 Zhongqiu Li, Jiachen Liua, Shun Li, Bing Zhou and Wei Jing School of Materials Science and Engineering of Tianjin University, Key Lab of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin 300072, China a jcliu@tju.edu.cn Keywords: Ceramics; LaPO4; Weak bonding interface; Thermal shock resistance Abstract.
ZrO2 is an important material that is widely used in structural engineering due to its excellent mechanical properties and good erosion resistance [3].
With regard to the LaPO4-ZrO2 composites, Marshall et al. [6] prepared a number of multilayered composites with La-monazite and various ZrO2 based materials.
Journal of Rare Earths.
Materials Research Bulletin, Vol.37(2002) p.1107
Online since: February 2011
Authors: Chang Zhou Wang, Jin Chun Song, Shao Guang Li
Based on the heat transfer theory [3], thermal conductivity λ can be got from (5) Where q is the heat flux (W/m2); λ is thermal conductivity of materials (W/ (m· K)); △T is temperature difference (K); and δ is the thickness of conducting surface (m).
Thermal diffusivity α [4] denotes the speed of heat transfer (m2/s), and is given by (6) Where λ is the thermal conductivity of a material (W/ (m· K)); Cp is the specific heat capacity of the material (J/ (kg· K)); and ρ is the density of the material (kg/m3).
Basically, each material has its own inherent reaction to infrared radiation, which is named “heat absorption factor” [5].
Each type of material can be categorized in a certain wavelength.
Technolofy and Applications of Infrared Heating in the industrial Area, Journal of Engineeringand Applied Sciences 2 (7): 1183-1187 (2007)
Online since: November 2011
Authors: Yu Qiao Zheng, Rong Zhen Zhao, Shu Zhen Zhang, Bin Peng
According to the stacker fork material parameters, the finite element program ANSYS select the appropriate unite of body meshing, finite element model shown in Figure 1 .
(4) Defining material properties GUI:Main Menu>Preprocessor>Material Props>Constant>Isotropic.
Because the material, the metal structure of stacker is static related to track, so we need to carry the items on the tray, tray can move related to stacker body.
Acknowledgment This paper is supported by Natural Science Foundation (No.50875118) References [1] J.Zheng Yu-qiao, Zhang Dui-xue, Huang Jian-long.
International Journal of Mhine Tools Manufaction, 2002.7(1):15-20
Online since: October 2021
Authors: Rudolf Hela, N.N. Bashkatov, Fedor L. Kapustin
Hela2,c 1Department of Materials Sciences in Construction of the Institute of New Materials and Technologies, Ural Federal University, 19, Mira street, Yekaterinburg 620002, Russia 2Institute of Technology of Building Materials and Components, University Engineering of Technology, Veveri 95, Brno 60200, Czech Republic af.l.kapustin@urfu.ru, bn.n.bashkatov@urfu.ru, chela.r@fce.vutbr.cz Keywords: oil-well cement, lightening additive, tripoli, opoka, diatomite, properties.
Oil-well lightweight Portland cement is obtained by intergrinding of Portland cement clinker, “lightening” additives and gypsum, or by thoroughly mixing these materials, but separately ground.
Chemical composition of raw materials.
Journal of Mining & Geo-Engineering 49 (2015) 281-288
Oreshkin, Lightweight oil-well materials, Construction of oil and gas wells on land and sea 11 (2002) 21-23
Online since: December 2010
Authors: Xiu Li Du, Jing Bo Liu, Zuo Hu Wang
However, FRPs are brittle linear materials, which will lead to the brittle failure modes of FRP prestressed concrete beams.
Materials properties.
After analyzing the existent performance indices, Feng proposed new deformability indices for various load-deformation curves of members made of new materials [8].
Acknowledgements The authors would like to acknowledge the financial support of the National Natural Science Foundation of China (No.50838001).
References [1] Janet M.Lees, Chris J.Burgoyne: ACI Structural Journal Vol. 96 (1999), p.377 [2] Janet M.Lees, Chris J.Burgoyne: ACI Structural Journal Vol. 97 (2000), p.252 [3] Zuohu Wang, Zongcai Deng, Xiuli Du: Journal of mechanical strength Vol. 29 (2007), p.914 (in Chinses) [4] Mohamed Saafi, Houssam Toutanji: Construction and Building Materials Vol. 12 (1998), p.245 [5] Houssam Toutanji, Mohamed Saafi: Composite Structures Vol. 44 (1999), p.63 [6] Nabil F.