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Online since: October 2011
Authors: Yu Zhen Yu, Rong Jian Li, Yu Jie Jiao
The results show that the global stiffness of the reinforced slope is obviously affected by the diameter of the pile and the liquefaction in substratum, which thereby affects the seismic acceleration response and the distribution of spectral amplification factor.
In order to meet the more perfect conditions of similarity on the model pile, the reinforced concrete model piles were developed and made up of model concrete and galvanized wire which had similar mechanical properties as steel, and this kind of model pile can reflect the failure mechanisms of the prototype reinforced concrete pile [3].
The properties of model 3 were the same as that of model 2 except that model 3 was under the condition of a high water table (Fig.2).
As is shown in Fig.8, the maximal amplification factors in the substratum section and near the slope crest are 1.79 and 3.40 in model 1, respectively.
Thus the maximal amplification factors at the slope crest only augment a little.
Online since: November 2015
Authors: Joanna Julia Sokołowska, K.G. Tonet, Jane Proszek Gorninski
These composites display excellent mechanical properties but need to be adapted to control the combustibility properties.
This restriction is explained by the fact that the fire risk of structures are linked to factors such as the amount and type of flammable materials used during the construction.
This interaction accounts for the improved mechanical performance of PC while also affecting porosity, a property which directly impacts on durability and flame resistance, the main focus of this study.
Furthermore, the material porosity is one of the factors which influences in the temperature evolution as well as in the fire spread.
Study on the influence of isophtalic and ortophtalic polymer resins and fly ash concentration on PC mechanical properties and durability.
Online since: September 2011
Authors: Fu Ju Gao
., Petroleum University of China, Qingdao 266555, Shandong, China gaofuju@upc.edu.cn Keywords: coastal saline soil, mechanical properties, foundation and basis, design and construction, artificial planting Abstract.
Based on the recent 20 years' observation and research, this paper briefly discusses the mechanism of forming, mechanical properties of coastal saline soil and the main factors which bring the important influence to buildings.
The Forming, Physical and Engineering Properties of Saline Soil in Dongying The Forming of Saline Soil in Dongying Dongying is located at the Yellow River Delta.
Chlorine ion content is the key and major index of soil erosive environment, and relating to other factors, such as oxygen content and the covering conditions—interface of fry and wet alternating exist or not.
The mechanics of saline soil is defined mainly by the following factors: salt, water and soil, which form the complexity of appraising saline soil mechanics.
Online since: June 2021
Authors: Ke Tong, Shen Cong, Qing Liu, Bo Zhu, Xu Ying Kang
The existence of banded structure not only affects the strength, toughness and other mechanical properties of the steel but also the thermal processing and welding performances.
The inspection process is subject to human factors.
Conclusion In general, the presence of banded structure mainly affects the corrosion resistance, strength, toughness and other mechanical properties of petroleum pipe.
The microstructure of petroleum pipe is affected by many factors such as the alloy composition and rolling technique, which explains its diversified banded structures.
Effect of quenching temperature on microstructure and mechanical properties of low-alloyed corrosion resistance OCTG[D].
Online since: October 2014
Authors: Ying Liang, Chun Yan Cui
Thus, the composite casing artificial accelerated aging test should increase the role of mechanical force factor, while the composite insulator aging research methods and conclusions should also increase the qualification when applied to silicone rubber composite casing.
These aging systems will directly affect the safe operation of, if not timely measures will bring very serious consequences.
(a) Transverse crack (b) Longitudinal crack Fig.1 Crack forms of silicone rubber composite coat Different cracks when subjected to the impact of external factors will appear different crack extension phenomenon.
(a)Radial crack (b)Axial crack (a)Radial crack (b)Axial crack Fig.5 Different form of crack stress nephogram Fig.6 Different form of crack displacement nephogram From Figures 5 and 6, it is evident that four vertices of the rectangle is force and large displacement takes place, which reminds us that when aging occurs silicone rubber composite casing cracks, the crack phenomenon easily crack extension, so we must make timely repair and replacement work, and lest silicone rubber sheath of glass steel pipe loss protection, lead to the electrical and mechanical properties of the severe decline in [7], serious power accident.
c)According to the ANSYS analysis results found that the edge of the crack can easily develop into deeper and more serious cracks when affected by the external environment, it must make a timely repair and replacement work, in order to avoid serious power accident.
Online since: September 2011
Authors: Zhan Qiang Liu, Fu Lin Jiang, Gang Liu
Both types of interference and their related influencing factors are described firstly in this paper.
The main factors which affect the amount of interference fit are analyzed firstly in this paper.
Physical properties for the materials of tool shank and shrink fit toolholder are shown in Tab 1.
Tab 1 Physical properties for the materials of tool shank and shrink fit toolholder Physical properties Material Elastic modulus [GPa] Poisson ratio Density [103Kg/m3] Friction coefficient shrink fit toolholder H11 225 0.28 7.8 0.2 tool shank cemented carbide 640 0.22 15 Initial Interference Amount Affecting Contact Pressure.
Spindle Rotation Speed Affecting Interference Amount.
Online since: January 2011
Authors: Martin Juliš, Marta Kianicová, Ondřej Dvořáček, Karel Obrtlík, Tomáš Podrábský, Simona Hutařová
However, the effect of coatings on mechanical and fatigue properties is not sufficiently known because it is a combination of many factors as high-temperature exposure time, thermal cycle and coating deposition technique.
This paper is focused on the study of microstructure and properties of aluminide protective layers deposited on cast polycrystalline nickel base superalloy Inconel713LC.
Protective properties of diffusion coatings depend on their thickness and composition.
Thus, to attain high coating resistance to oxidation, hot corrosion and erosion without the reduction of mechanical and fatigue properties, an optimum coating thickness has to be chosen.
Interactions between individual layers of the system can adversely affect both the protective coating and superalloy properties.
Online since: October 2014
Authors: Jaroslava Koťátková, Pavel Reiterman
Higher amounts don´t bring about higher tinting strength and in the case of more than 10 % its mechanical properties can be negatively affected.
In case of using more 10 % of pigment the mechanical properties of concrete deteriorate.
Lightness, hue and saturation are represented by the three factors L*, h* and C* respectively.
It will be necessary to perform number of laboratory tests to evaluate sufficient durability properties of those modified composites.
Influence of iron oxide pigments on the properties of concrete interlocking blocks, Cem Concr Res 2003, Vol. 33, pp. 1889–1896
Online since: June 2018
Authors: Grigory Ivanovich Yakovlev, Grigory Nikolaevich Pervushin, Alsu Khamatova, Vadim Khozin
The physicochemical and physicomechanical properties of quick-setting compositions based on fine-grained electric steelmaking slag (ESS) produced by Izhstal PJSC, Russia, have been examined.
This can be proved by the obtained results of the setting and testing timing of the mechanical properties of the mixture.
It had a dark gray color and some large inclusions in addition to the silt part and demonstrated magnetic properties.
Results Chemical modifiers, including plasticizing admixtures and hardening accelerators, were added to the composition in order to improve its physical and mechanical properties: plasticizers – to increase workability and reduce water demand; accelerators – to shorten setting and accelerate hardening.
Mehrotra, Mechanical activation of granulated blast furnace slag and its effect on the properties and structure of portland slag cement, Cement and Concrete Composites. 8 (2008) 679-685
Online since: February 2019
Authors: S.V. Anakhov, Yu.A. Pyckin, I.Y. Matushkina
The basis of formalization of the efficiency definition in this case using the notion of an absolute indicator properties Qi (i = 1,2... n), expressed in characteristic individual properties of the units (HAZ depth in microns, cutting speed in m/s, etc.).
In this regard, in addition, the weight coefficients Gi are set, which determine the relative "importance" of the i-th property on a single scale for all properties.
The normalized weights Hi = Gi/ΣGi, varying from 0 (for unimportant properties) to 1 (for important properties), are typically used for this purpose.
Integral factor of cutting quality LQ (by 1P, 1E, 2Q, 3Q, 5Q and 6Q parameters).
In any case, the use of the qualimetric method of evaluating the effectiveness of plasma torches for cutting allows objectively assess their consumer properties and on this criterion.
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