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Online since: June 2018
Authors: Ivo Kusák, Pavel Rovnaník, Patrik Bayer, Maria Míková
The results are compared to ordinary Portland cement (OPC) mortar treated at the same conditions so that the influence of external factors are eliminated.
Together with these measurements the mechanical properties and microstructure were performed in order to explain essential differences in electrical properties of AAS and OPC mortar.
Mechanical properties of tested specimens were determined according to the EN 196-1 standard.
Results and Discussion Mechanical properties.
These small pores do not affect the mechanical properties but they might have an essential influence on ionic conductivity.
Online since: December 2014
Authors: Jun Wu
Due to large variations of asphalt content, aggregate type, gradation, distribution and so on, mechanical properties of asphalt mixture are very complicated.
Accordingly, it is important to construct a micromechanical constitutive model containing the component and microstructure information with micromechanical approaches in order to predict mechanical properties of asphalt mixture [1-3].
The micromechanics methods played important roles in the viscoelastic or viscoplastic properties prediction of composites [6,7] and were recently applied to asphalt mixture.
The Eshelby equivalent inclusion theory is extended to predict effective uniaxial compression creep properties of asphalt mixture using the elastic-viscoelastic correspondence principle.
[4] Shashidhar, N., and Romero, P., Factors affecting the stiffening potential of mineral fillers, Transport Res Rec, Vol. 1638, 1998, 94-100
Online since: February 2016
Authors: Marin Gostimirović, Milenko Sekulić, Vladimir Pucovsky, Borislav Savković, Pavel Kovač
To help identify the share of heat which affects the workpiece, firstly the analysis of past research in the field of heat transfer during grinding was conducted.
Goal of this analytical dependence is to achieve more efficient production of mechanical parts without thermal defects in the surface layer of the part.
With effective management of heat development and distribution in the cutting zone, production of mechanical parts can be achieved without reduction of exploitation properties.
During this procedure almost all of the mechanical work is transformed through deformation, separation and friction into heat energy, Fig. 1.
Savkovic, Surface layer properties of the workpiece material in high performance grinding, Metalurgija, Vol. 51/1/2012, pp. 105-108
Online since: May 2012
Authors: Liu Jin, Xiu Li Du, Yan Zhao, Min Du
The interface transition zone (ITZ) has a significant impact on the concrete’s mechanical properties and fracture modes.
The results show that ITZ’s strength and elastic modulus have a certain effect on the mechanical properties and fracture modes.
The characteristic of ITZ significantly affects the mechanical properties and fracture process of concrete.
Lybuimove firstly studies the mesostructure concrete and puts forward the concept of ITZ, takes ITZ as the leading factor to concrete’s mechanical property [4].
Compared with the mortar, the parameters of ITZ, including low strength, low elastic modulus and high permeability, influence concrete mechanical properties [7].
Online since: October 2013
Authors: Ming Hua Liang, Hong Yan Liu, Xiao Dong He
Study on the Influence Factors of DWTT for X70 Thick Wall Linepipe Minghua Liang1,a, Hongyan Liu2,b, Xiaodong He1,c 1CNPC Tubular Goods Research Institute,China 2CCDC Changqing General Drilling Company, China aliangmh@cnpc.com.cn, b32559419@qq.com, chexiaodong002@cnpc.com.cn Keywords: DWTT, X70 , Thick Wall Linepipe, Influence Factors Abstract.
The influence factors of DWTT are discussed for X70 thick wall linepipe steel.
The influence factors of DWTT (nonuniformity of the material, ductile-brittle transition temperature, notch type, evaluation method of the fracture surface, machining method and the test equipments) are discussed for X70 thick wall linepipe steel.
Thus, the machining location of the thickness reduced specimens will directly affect the test result.
Different notch types of the specimens can affect the result.
Online since: February 2016
Authors: Alexsandr I. Kondratev, Natalia Galkina, Andrey V. Balyakin
Determination of rheological properties of titanium alloys under conditions of high strain rates Andrey V.
Heating of the tool's cutting edge during the cutting process causes a change in the structure and mechanical properties of the material, and at certain temperature it intensifies the adhesion and diffusion phenomena.
The temperature of cutting depends on the cutting mode, conditions and on the mechanical and thermal properties of the workpiece material and tool.
Determination of temperature and resistance dependencies of titanium alloy [4] and a comparison of the data with their mechanical and thermal properties and the properties of the tool material, allow to use cutting temperature, as one of the criteria of workability of new materials.
Mechanical and thermal properties of the alloy Ti – 6AL – 4V are given in Table 2 [3].
Online since: November 2015
Authors: Mohd Edeerozey Abd Manaf, Noraiham Mohamad, Loganarrth Maslamany, Muhammad Syafiq Mohd Hussain, Mohd Abrar Abd Latif
In this study, the effects of oil palm shell powder (OPSP) addition on the mechanical properties of kenaf reinforced polypropylene (PP) composites are investigated.
Natural fiber reinforced thermoplastic composites have been widely studied in an attempt to obtain benefit from the cost and mechanical properties of these natural fibers.
Olumuyiwa et al. [10] studied the effect of OPS particle sizes (150, 300 and 400 μm) on the mechanical properties of recycled polyethylene composite.
A good filler distribution also could be one of the factors that contribute to the increase in tensile strength.
Conclusion The effects of OPSP addition on the mechanical properties of two types of kenaf/PP composites are compared.
Online since: April 2011
Authors: Li Na Wang, Yan Wei Wang, Chang Zheng Xin, Xiang An Huang
Optical microscope and Electron microscopy were employed to evaluate the properties and morphology of the materials.
The influence factors on polymerization were discussed.
Microencapsulated phase change materials (MPCMs) not only have the ability of phase change from solid-liquid to presolid-solid in the meantime avoiding the influence of outside moisture, oxygen and other factors, but also can improve the stability of phase change materials.
In this paper po1yoxyethylene octylphenol ether (OP-10) was the emulsifier, which was easily resolved in water and formed stable emulsion because the coverage area αs is 0.60 nm2 [6]. ②Emulsifying temperature Emulsifying temperature in the emulsifying step was one of the important factors affecting the result of emulsifying and also decided by melt-point of core.
The results can be obtained as following: 1) The emulsifier is one of the important factor affecting morphology of MPCMs, so the proper concentration of the OP is 1%. 2) The ammonia chloride reacted with methanol, which lead the PH decreased, the uniformity microcapsules can be obtained at 70℃. 3) The acidification time affects the ability of forming capsules, so the better is 60 minutes.
Online since: April 2019
Authors: Bel Abbès Bachir Bouiadjra, Abdelkader Djebli, El Bahri Ould Chikh, Habib Khellafi, Mustapha Bendouba, Abdeldjalil Mankour, Mohammed Mokhtar Bouziane
Hence, a number of different factors and properties have been identified to affect the mechanical properties of PMMA based bone cement [8].
The mechanical properties of PMMA bone cements has been the subject and, explained in details by an important number of research articles.
Numerous factors can indicate the mechanical effectiveness of PMMA bone cements, comprising cement composition, the sterilization technique, the mixing method, the state of both bone and implant and the in vivo atmosphere [23].
Pal, The mechanical properties of bone cement: a review, J Biomed Mater Res.18 (1984) 435-462
Dunne, Mechanical properties of bone cements, Orthopaedic bone cements.
Online since: January 2026
Authors: Benjamin Klusemann, Uceu F.H. Suhuddin, Lasse Malaske
Optimizing the mechanical properties of aluminum to titanium welds is crucial to establish applications for dissimilar lightweight structures in the aerospace industry.
Consequently, major interest during this study was given on the temperature evolution, interfacial features and the global mechanical properties.
In terms of mechanical properties, all material combinations generated solid joints, reaching between ~ 4 and 8.5 kN of ultimate lap shear force and failing partially in the interface or in the aluminum sheet.
The global as well as local mechanical properties of the joints were determined and correlated with the measured temperatures.
Furthermore, Mg and Si content was systematically varied, and their effects on temperature and mechanical properties of the obtained welds investigated.
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