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Online since: October 2015
Authors: Givanildo Azeredo, Arnaldo Manoel Pereira Carneiro, Aline Figueirêdo Nóbrega de Azerêdo
Properties like flexural and compressive strengths, water absorbed capillarity and loss mass variation were studied in mortars.
The main objective of this research is investigate the influence of these phases in hardened properties of mortars.
Mechanical Tests Procedures.
Hardened Properties of Lime Based Mortars Produced From Kaolin Wastes.
F., Kaolinitic calcined clays: Factors affecting its performance as pozzolans.
The main objective of this research is investigate the influence of these phases in hardened properties of mortars.
Mechanical Tests Procedures.
Hardened Properties of Lime Based Mortars Produced From Kaolin Wastes.
F., Kaolinitic calcined clays: Factors affecting its performance as pozzolans.
Online since: December 2009
Authors: Yan He, Hai Tao Li, Lian Xiang Ma
Main Properties of Carbon Black
Carbon black DBP [mL/100g] Particle size [nm]
N330 102 11-19
N375 114 11-19
Sample Preparation and Testing.
(5) Where, C1 is factor of the effect on crystallinity and crystal size of polymer and C2 is the factor of ease in forming conductive chains of particles.
The particle size is other factor which affects the thermal conductivity of rubber composite.
:Thermal Properties of Heat Conductive Silicone Rubber Filled with Hybrid Fillers.
:Dynamic Mechanic Properties of Particulate-filled composites, Journal of Applied Polymer Science, (1970)14(1);449
(5) Where, C1 is factor of the effect on crystallinity and crystal size of polymer and C2 is the factor of ease in forming conductive chains of particles.
The particle size is other factor which affects the thermal conductivity of rubber composite.
:Thermal Properties of Heat Conductive Silicone Rubber Filled with Hybrid Fillers.
:Dynamic Mechanic Properties of Particulate-filled composites, Journal of Applied Polymer Science, (1970)14(1);449
Online since: November 2012
Authors: Tie Ying Li, Min Yao
equivalent viscous damping ratio of the seismic-isolation story;
——horizontal dynamic stiffness of the seismic-isolation story;
——equivalent viscous damping ratio of the j-th isolator unit determined by testing;when damper is set up independently, corresponding damping ratio of the damper shall also be taken into account;
——horizontal dynamic stiffness of the j-th isolator unit determined by testing;
,——representative values of gravity load concentrated at the masses of i-th and j-th respectively;
——gravity load representative value of structure above the seismic-isolation story.
2 Time-history analyzing method
The calculation model of the seismic-isolation building structures may adopt the shear type model, the response spectrum characteristics and amount of the input seismic wave shall comply with the provisions in Clause 5.1.2 0f the《code for seismic design of buildings》GB50011-2010; the calculation result should choose the envelope value; the input wave should consider near-field affected
factors. 4.
The mechanical properties and structural sizes are shown in Table 1.
Table1 Lead laminated rubber bearings structure dimensions and mechanical properties model GZY500 preyield shear stiffness/(KN/mm) 11 outside diameter/mm 520 post yield stiffness/(KN/mm) 0.8 effective diameter/mm 500 equivalent damping ratio(100%shear strain) 20% lead core diameter/mm 100 vertical stiffness/(KN/mm) 1800 rubber total thickness/mm 100 vertical design bearing capacity/KN 2500 yield stress/KN 60 maximum displacement/mm 275 4.3 Seismic wave selection when do the time-history analysis, using 3 site-classII seismic wave, they are EL-Centro wave, TangShanEW wave and artificial wave ( Lanzhou wave 1).
factors. 4.
The mechanical properties and structural sizes are shown in Table 1.
Table1 Lead laminated rubber bearings structure dimensions and mechanical properties model GZY500 preyield shear stiffness/(KN/mm) 11 outside diameter/mm 520 post yield stiffness/(KN/mm) 0.8 effective diameter/mm 500 equivalent damping ratio(100%shear strain) 20% lead core diameter/mm 100 vertical stiffness/(KN/mm) 1800 rubber total thickness/mm 100 vertical design bearing capacity/KN 2500 yield stress/KN 60 maximum displacement/mm 275 4.3 Seismic wave selection when do the time-history analysis, using 3 site-classII seismic wave, they are EL-Centro wave, TangShanEW wave and artificial wave ( Lanzhou wave 1).
Online since: January 2020
Authors: N.P. Lukutsova, R.A. Efremochkin, S.N. Golovin
They impart new properties to the surface of the dispersed phase and the system as a whole [8-12].
The stability of the suspension obtained by ultrasonic dispersion in the aqueous medium of the surfactant as a property to resist the aggregation and sedimentation of the particles depends on many factors, and can be shown in the form of a figure as follows (Fig. 1).
Factors affecting the stability of the suspension obtained by ultrasonic dispersion The objective of the work is to study the stability of the suspension of titanium dioxide of anatase modification obtained by ultrasonic dispersion in the aqueous medium of the stabilizer for self-purifying fine concrete as a finishing material of building envelope.
Later, the adsorption of polar particles is carried out on new interphase surfaces, thus leading not only to a uniform distribution of titanium dioxide particles in the aqueous medium, but, probably, to a uniform distribution of surfactants on the surface of TiO2 particles in the "titanium dioxide – water – stabilizer" system, thereby increasing the electrostatic and structural-mechanical factors of suspension aggregate stability.
The stability of the suspension obtained by ultrasonic dispersion in the aqueous medium of the surfactant as a property to resist the aggregation and sedimentation of the particles depends on many factors, and can be shown in the form of a figure as follows (Fig. 1).
Factors affecting the stability of the suspension obtained by ultrasonic dispersion The objective of the work is to study the stability of the suspension of titanium dioxide of anatase modification obtained by ultrasonic dispersion in the aqueous medium of the stabilizer for self-purifying fine concrete as a finishing material of building envelope.
Later, the adsorption of polar particles is carried out on new interphase surfaces, thus leading not only to a uniform distribution of titanium dioxide particles in the aqueous medium, but, probably, to a uniform distribution of surfactants on the surface of TiO2 particles in the "titanium dioxide – water – stabilizer" system, thereby increasing the electrostatic and structural-mechanical factors of suspension aggregate stability.
Online since: August 2015
Authors: Ranjitha Jambulingam, Prateek Rastogi, Michael S. Donatus, S. Vijayalakshmi
Similarly, the jatropha oil was analysed for their physiochemical properties using ASTM.
The results of physicochemical properties were listed in Table 2.
Table 2 Physicochemical properties of jatropha oil S.No Physiochemical Properties Jatropha Oil 1.
Pramanik, Properties and use of Jatropha curcas oil and diesel fuel blends in compression ignition engine, Int.
Becker, Comparative evaluation of non-toxic and toxic varieties of Jatropha curcas for chemical composition, digestibility, protein degradability and toxic factors, Food Chemistry. 62 (1998) 207-215
The results of physicochemical properties were listed in Table 2.
Table 2 Physicochemical properties of jatropha oil S.No Physiochemical Properties Jatropha Oil 1.
Pramanik, Properties and use of Jatropha curcas oil and diesel fuel blends in compression ignition engine, Int.
Becker, Comparative evaluation of non-toxic and toxic varieties of Jatropha curcas for chemical composition, digestibility, protein degradability and toxic factors, Food Chemistry. 62 (1998) 207-215
Online since: September 2007
Authors: Sung Ok Oh, Tae Soo Kim, Han Seung Lee, Sung Ho Tae
In particular, the frictional state between the base
material and joint panels significantly affects the internal sliding force and fatigue strength in high
tension bolt joints[1],[2].
Table 1 shows the mechanical properties of base materials, joint panels, and high tension bolts.
Table 1 Mechanical properties of materials Material Type Yield strength(MPa) Tensile strength (MPa) Base materials, Joint panels SM 490B 368.3 529.2 High tension bolt F10T 1027.0 1077.0 Methods and levels in surface treatments.
Evaluation of the influence factor on the mechanical characteristics in high tension bolt joints.
Experimental study on the Corrosion Protection Properties and Anticorrosive life of the Zn/Al Metal Spray Method according to the Contents Ratio of Zn and Al.
Table 1 shows the mechanical properties of base materials, joint panels, and high tension bolts.
Table 1 Mechanical properties of materials Material Type Yield strength(MPa) Tensile strength (MPa) Base materials, Joint panels SM 490B 368.3 529.2 High tension bolt F10T 1027.0 1077.0 Methods and levels in surface treatments.
Evaluation of the influence factor on the mechanical characteristics in high tension bolt joints.
Experimental study on the Corrosion Protection Properties and Anticorrosive life of the Zn/Al Metal Spray Method according to the Contents Ratio of Zn and Al.
Online since: August 2015
Authors: John Dear, Mohamed Mohamed, Zhusheng Shi, Trevor Dean, Jian Guo Lin
Strain-based continuum damage mechanics model for predicting FLC of AA5754 under warm forming conditions
Mohamed Mohamed1,3a *, Zhusheng Shi1,b, Jianguo Lin1,c , Trevor Dean2,d, John Dear1,e
1Department of Mechanical Engineering, Imperial College London, London, SW7 2AZ, UK
2School of Mechanical Engineering, University of Birmingham, B15 2TT, UK
3School of Mechanical Engineering, Helwan University, Helwan, Egypt
ammohamed@imperial.ac.uk, bzhusheng.shi@imperial.ac.uk, cjianguo.lin@imperial.ac.uk, dt.a.dean@bham.ac.uk, ej.dear@imperial.ac.uk
Keywords: Aluminium alloys, Warm forming, Forming limit curve (FLC), continuum damage mechanics (CDM) model.
Several factors affect the FLC including sheet thickness [5], temperature [6], strain rate and grain size [7] and strain hardening exponent [8].
In this case, is a correction factor representing the difference between the uniaxial tensile data and cup (formability) test results at .
As the temperature increases, the effects of strain rate on tensile properties and FLC position become more prominent.
Influence of the plastic properties of a material on the forming limit diagram for sheet metal in tension.
Several factors affect the FLC including sheet thickness [5], temperature [6], strain rate and grain size [7] and strain hardening exponent [8].
In this case, is a correction factor representing the difference between the uniaxial tensile data and cup (formability) test results at .
As the temperature increases, the effects of strain rate on tensile properties and FLC position become more prominent.
Influence of the plastic properties of a material on the forming limit diagram for sheet metal in tension.
Online since: October 2010
Authors: Ben Sheng Huang, Zhong Ying Jiang, Zhou Fan
By comparing the Tafel slope and the corrosion current, get the affecting extent and law of chloride ion to the drill pipe corrosion.
The impact properties are tested by the six samples of which the dimensions are all 10mm×10mm×55mm.
Fig.1 The size of SSRT specimen Fig.2 The appearance of the specimen The Mechanical Properties of G105 Drill Pipe The chemical composition and tensile properties of G105 are showed in Table.1 and Table.2, its microstructure is showed in Fig.3.
The impact properties are respectively: 144J, 144J, 144J, 136J, 144J, 141J.
When we choose corrosion inhibitor, we not only should consider the constitutes of corrosion medium, operation parameters and possible corrosion types, but also consider the corrosion properties of corrosion inhibitor and the compatibility of medium and additives.
The impact properties are tested by the six samples of which the dimensions are all 10mm×10mm×55mm.
Fig.1 The size of SSRT specimen Fig.2 The appearance of the specimen The Mechanical Properties of G105 Drill Pipe The chemical composition and tensile properties of G105 are showed in Table.1 and Table.2, its microstructure is showed in Fig.3.
The impact properties are respectively: 144J, 144J, 144J, 136J, 144J, 141J.
When we choose corrosion inhibitor, we not only should consider the constitutes of corrosion medium, operation parameters and possible corrosion types, but also consider the corrosion properties of corrosion inhibitor and the compatibility of medium and additives.
Online since: May 2011
Authors: Yi Zhu He, Guang Ping Cheng
In fact, the reduction of aluminum content will directly affect the coating oxidation resistance.
Properties such as melting and vaporization temperatures, solidification behavior as well as the physical and mechanical properties of the coating materials are important factors to be considered.
Increasing laser power, coatings dilution rates increase, the heat affected zone of the substrate expand, coating oxidation tendency become serious, even causing crack phenomenon.
Thus higher cladding power or low scanning speed can only be taken, that will result in not only high energy consumption, but also the Fe amount in coat from substrate increasing even to 40at% [11,12], and will directly affect the coating high temperature oxidation resistance.
Figure 5 shows the distribution of the coating along the thickness direction from surface to the steel substrate heat-affected zone.
Properties such as melting and vaporization temperatures, solidification behavior as well as the physical and mechanical properties of the coating materials are important factors to be considered.
Increasing laser power, coatings dilution rates increase, the heat affected zone of the substrate expand, coating oxidation tendency become serious, even causing crack phenomenon.
Thus higher cladding power or low scanning speed can only be taken, that will result in not only high energy consumption, but also the Fe amount in coat from substrate increasing even to 40at% [11,12], and will directly affect the coating high temperature oxidation resistance.
Figure 5 shows the distribution of the coating along the thickness direction from surface to the steel substrate heat-affected zone.
Online since: July 2011
Authors: Ai Min Yang
The early research believed that the chemistry nucleation happen directly on the external basis by means of some kind of chemistry reactions such as peritectoid reaction, in which the nucleating efficiency is only decided by the quantity of the external particles.In fact, heterogeneous nucleation is influenced by very many factors,such as the surface energy between the particles and the melt, the segregation of solute atoms (that will changes the surface composition of particle).
Bramfitt[1] proposed using the wrong matching degree between the nucleating atoms and the substrate to estimate the heterogeneous nucleating possibility, but Glicksman and Childs [2] noted that physico-chemical properties difference between the melt and the nucleating particles was possibly more important than the wrong matching.In recent years the people have started to pay attention to function of the solute element in the refinement process.
Here we will directly study the influence on nucleating of solute atoms by introducing the solute atom chemical property to the nucleating model, and try to give a critical criterion which shows the effect on the nucleating process of the solut segregation.
From famula (4), famula (13) is: ΔGγsegr= -0.24ΔHb0(1-xb)2+Ωb(σbls-σbls) +ΔWab Ωb (12) From the famula, the solute ingredient can also affect ΔGγsegr.
Hanqi.Hu, Metal Solidification Principle, Mechanical Industry Publishing Press. 10.
Bramfitt[1] proposed using the wrong matching degree between the nucleating atoms and the substrate to estimate the heterogeneous nucleating possibility, but Glicksman and Childs [2] noted that physico-chemical properties difference between the melt and the nucleating particles was possibly more important than the wrong matching.In recent years the people have started to pay attention to function of the solute element in the refinement process.
Here we will directly study the influence on nucleating of solute atoms by introducing the solute atom chemical property to the nucleating model, and try to give a critical criterion which shows the effect on the nucleating process of the solut segregation.
From famula (4), famula (13) is: ΔGγsegr= -0.24ΔHb0(1-xb)2+Ωb(σbls-σbls) +ΔWab Ωb (12) From the famula, the solute ingredient can also affect ΔGγsegr.
Hanqi.Hu, Metal Solidification Principle, Mechanical Industry Publishing Press. 10.