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Online since: September 2017
Authors: M.O. Korovkin, N.A. Eroshkina
Milling fineness of the binder has significant impact on its properties.
Values of the equation factors for the binders with various specific surface area are stated in Table 2.
It is generally recognized that these processes are decisively influenced by compounding and temperature factors.
Singh, Fly ash/Kaolin based geopolymer green concretes and their mechanical properties, Data in Brief., 5 (2015) 739-744
Tao, Synthesis factors affecting mechanical properties, microstructure, and chemical composition of red mud-fly ash based geopolymers, Fuel, 134 (2014) 315-325
Values of the equation factors for the binders with various specific surface area are stated in Table 2.
It is generally recognized that these processes are decisively influenced by compounding and temperature factors.
Singh, Fly ash/Kaolin based geopolymer green concretes and their mechanical properties, Data in Brief., 5 (2015) 739-744
Tao, Synthesis factors affecting mechanical properties, microstructure, and chemical composition of red mud-fly ash based geopolymers, Fuel, 134 (2014) 315-325
Online since: November 2020
Authors: Patrice Peyre, Seddik Ouallam, J.E. Masse, M.L. Djeghlal, F. Guittonneau, Z. Boutaghou, L. Kaba
However, there is a lack of study in the welding mechanical properties of these materials.
This phenomenon is then more important than in the BM. 4) The mechanical properties after welding are little affected by the joining process: there is a moderate hardness increase attributed to a refined microstructure (decreased grain size and distribution of the phase Mg17Al12), and a slight decrease of tensile properties due to the presence of small-sized pores in the melted zone.
Balasubramanian , Influences of pulsed current parameters on mechanical and metallurgical properties of gas tungsten arc welded AZ31B magnesium alloy, V.
Mao et al., Influence of tool rotation rates on temperature profiles and mechanical properties of friction stir welded AZ31magnesium alloy.
Pinto et al., Microstructure and mechanical properties of magnesium alloy AZ31B laser beam welds, Materials Science and Engineering: A, 485:1-2 (2008), 20-30
This phenomenon is then more important than in the BM. 4) The mechanical properties after welding are little affected by the joining process: there is a moderate hardness increase attributed to a refined microstructure (decreased grain size and distribution of the phase Mg17Al12), and a slight decrease of tensile properties due to the presence of small-sized pores in the melted zone.
Balasubramanian , Influences of pulsed current parameters on mechanical and metallurgical properties of gas tungsten arc welded AZ31B magnesium alloy, V.
Mao et al., Influence of tool rotation rates on temperature profiles and mechanical properties of friction stir welded AZ31magnesium alloy.
Pinto et al., Microstructure and mechanical properties of magnesium alloy AZ31B laser beam welds, Materials Science and Engineering: A, 485:1-2 (2008), 20-30
Online since: August 2024
Authors: Wei Ting Hsu, Chang Hung Liu, Hsien Tang Wu
However, the design and analysis of steel-concrete beam-columns is a complex task involving many factors.
In the design of CFSTs, it is essential to understand the influence of these factors on the behavior of steel-concrete members.
In order to investigate the various factors affecting the behavior of HC FCS columns, Mohanad M. et al. (2023) [3] conducted a parametric finite element study and verified it using a three-dimensional numerical model.
Parameter studies underscored the influence of external steel tube properties and concrete shell thickness on column torsional behavior.
For slender sections, the bending strength under the same material properties is mainly affected by the effective elastic modulus.
In the design of CFSTs, it is essential to understand the influence of these factors on the behavior of steel-concrete members.
In order to investigate the various factors affecting the behavior of HC FCS columns, Mohanad M. et al. (2023) [3] conducted a parametric finite element study and verified it using a three-dimensional numerical model.
Parameter studies underscored the influence of external steel tube properties and concrete shell thickness on column torsional behavior.
For slender sections, the bending strength under the same material properties is mainly affected by the effective elastic modulus.
Online since: March 2011
Authors: M.R.M. Akramin, M. Mazwan Mahat, Zulkifli Ahmad
Probability theory determines how the uncertainties in crack size, loads, and material properties, when modelled accurately, affect the integrity of cracked structures.
The methods can account for random loads, material properties, and crack geometry.
The important parameters used in linear elastic fracture mechanics are the stress intensity factors in various modes.
The load, crack size and material properties were treated as statistically independent random variables.
The load and critical stress intensity factors, KIc were treated as statistically independent random variables.
The methods can account for random loads, material properties, and crack geometry.
The important parameters used in linear elastic fracture mechanics are the stress intensity factors in various modes.
The load, crack size and material properties were treated as statistically independent random variables.
The load and critical stress intensity factors, KIc were treated as statistically independent random variables.
Online since: September 2013
Authors: Teng Huang, Shao Min Lei, En Wen Wang, Guang Ming Bao
Studies for selection of optimum ball size are reported in the literature, and the grinding kinetics for barite must be evaluated in order to lower the energy costs in grinding process, some investigators have studied and reported that shape and morphological properties of particles can also affect subsequent processes such as flotation.
Zhang De etc. used metal acid ester and stearic acid as the modification, when reacted with 1% modification under 70~80˚C, barite have received high mechanical properties.
One of the factors which could be used to evaluate the effect of modification is the contact angle, when the angle is small, the wetting function of liquid is relatively easy. 3.2 Activation of barite Barite ore is the natural starting material for producing various barium components such as BaCO3,BaCl2 and Ba(NO3)2.
While various factors affecting on reduction process have been investigated experimentally, the main factors are the particle size of barite and gasification of coke.
At present, the mineral/TiO2 composite particle materials (M/TCPM), a core (mineral)-shell (TiO2) type composite particle materials with similar pigment properties to TiO2 are the best substitutes of TiO2 with good pigment properties.
Zhang De etc. used metal acid ester and stearic acid as the modification, when reacted with 1% modification under 70~80˚C, barite have received high mechanical properties.
One of the factors which could be used to evaluate the effect of modification is the contact angle, when the angle is small, the wetting function of liquid is relatively easy. 3.2 Activation of barite Barite ore is the natural starting material for producing various barium components such as BaCO3,BaCl2 and Ba(NO3)2.
While various factors affecting on reduction process have been investigated experimentally, the main factors are the particle size of barite and gasification of coke.
At present, the mineral/TiO2 composite particle materials (M/TCPM), a core (mineral)-shell (TiO2) type composite particle materials with similar pigment properties to TiO2 are the best substitutes of TiO2 with good pigment properties.
Online since: December 2009
Authors: Philip Boughton, P. Lok, T. Kishen, Ashish D. Diwan
FEA models were developed to study effects of implant jacket geometry and surface
properties on implant deployment and biomechanics.
This is, however, dependent on the intimacy and properties of interfacing tissues.
Instead of changing materials, geometrical and surface (interfacial) modulation can allow adjustment to macroscopic parameters (e.g. mechanical stiffness, friction and wear) normally associated with material bulk properties.
Radioopaque in situ curing polymer is then injected into a jacket of similar properties to fill the nucleotomy defect.
Conclusion This study demonstrates methods for modulating elastomeric and soft medical device mechanical properties without resorting to material modification.
This is, however, dependent on the intimacy and properties of interfacing tissues.
Instead of changing materials, geometrical and surface (interfacial) modulation can allow adjustment to macroscopic parameters (e.g. mechanical stiffness, friction and wear) normally associated with material bulk properties.
Radioopaque in situ curing polymer is then injected into a jacket of similar properties to fill the nucleotomy defect.
Conclusion This study demonstrates methods for modulating elastomeric and soft medical device mechanical properties without resorting to material modification.
Online since: April 2011
Authors: Qian Zhe Zhao, Yi Bing Liu, Yan Ping Liu, Wei Song Zhou
The main factors and mechanisms affecting the heating efficiency and the temperature uniformity are analyzed systematically by a combination of the simulation result and the experimental fact.
In general, the designed production line has the following features: high power density, low energy consumption, little oxidation, perfect mechanical properties and high surface quality etc [1].
The main factors that may influence the heating efficiency and the temperature uniformity are then discussed.
Through the analysis of core temperature, surface temperature, active power and heating efficiency of PC steel bar during the heating process, we conclude that the main factors affecting inductor heating efficiency and temperature difference between the core and the surface are heating frequency and exciting current intensity.
Freschi, Giaccone.L and Repetto.M: Identification of Equivalent Material Properties for 3-D Numerical Modeling of Induction Heating of Ferromagnetic Workpieces, IEEE Transactions on Magnetics, Vol. 45(2009), p. 1851-1854 [7] K.
In general, the designed production line has the following features: high power density, low energy consumption, little oxidation, perfect mechanical properties and high surface quality etc [1].
The main factors that may influence the heating efficiency and the temperature uniformity are then discussed.
Through the analysis of core temperature, surface temperature, active power and heating efficiency of PC steel bar during the heating process, we conclude that the main factors affecting inductor heating efficiency and temperature difference between the core and the surface are heating frequency and exciting current intensity.
Freschi, Giaccone.L and Repetto.M: Identification of Equivalent Material Properties for 3-D Numerical Modeling of Induction Heating of Ferromagnetic Workpieces, IEEE Transactions on Magnetics, Vol. 45(2009), p. 1851-1854 [7] K.
Online since: January 2012
Authors: Si Jin Liu, Chuan He, Kun Feng, Jun Wang, Chun Qi
The bending stiffness of segmental joints is the key factor which affects the mechanical characteristics of shield tunnel.
INTRODUCTION The most important feature of shield tunnels is that the bending behavior of segmental joints will affect the mechanical properties of the whole tunnel [1-2].
It can clearly be seen that, the relationship between and M showed nonlinear properties.
The joint opening also showed nonlinear properties, and the greater the axial force was, the larger the bending moment was required to produce the same value of . 2.
KOIZUMI, Experimental studies and numerical analyses on the properties of a new type segment for gas pipeline shield tunnel.
INTRODUCTION The most important feature of shield tunnels is that the bending behavior of segmental joints will affect the mechanical properties of the whole tunnel [1-2].
It can clearly be seen that, the relationship between and M showed nonlinear properties.
The joint opening also showed nonlinear properties, and the greater the axial force was, the larger the bending moment was required to produce the same value of . 2.
KOIZUMI, Experimental studies and numerical analyses on the properties of a new type segment for gas pipeline shield tunnel.
Online since: June 2014
Authors: Lei Zhang
After strenuous exercise , sportswear control performance on the water is a major factor affecting human comfort , good fiber or fabric thermal and moisture control should have the function of sweat and perspiration and rapid drying function.
Wicking fabric to factors twist , fiber cross-section shape.
Three-dimensional fabric composites are integral, non-hierarchical structure, with specific strength and high modulus and excellent mechanical properties , and therefore has great potential applications in the field of sports protection .
The use of three-dimensional fabric made of high performance fiber composite material is lighter and more excellent mechanical properties , can be used to produce the main load-bearing structural parts and special parts with a variety of functions.
As the three-dimensional weaving technology directly shaped woven pieces of different shapes overall , but also by the requirements of the yarn structure design, and therefore the mechanical properties and other properties on the three-dimensional fabric composites with adjustable resistance, in this regard in the production of sports protective gear has a good advantage .
Wicking fabric to factors twist , fiber cross-section shape.
Three-dimensional fabric composites are integral, non-hierarchical structure, with specific strength and high modulus and excellent mechanical properties , and therefore has great potential applications in the field of sports protection .
The use of three-dimensional fabric made of high performance fiber composite material is lighter and more excellent mechanical properties , can be used to produce the main load-bearing structural parts and special parts with a variety of functions.
As the three-dimensional weaving technology directly shaped woven pieces of different shapes overall , but also by the requirements of the yarn structure design, and therefore the mechanical properties and other properties on the three-dimensional fabric composites with adjustable resistance, in this regard in the production of sports protective gear has a good advantage .
Online since: April 2012
Authors: Yu Wen Liu, Hai Yan Wang, Jiao Yan Li, Bin Sun
Changes of mechanical properties and chemical structure of polyester (PET) fibers are studied through UV simulated accelerated ageing experiments with N2, air and O3 as the atmosphere.
Especially the polymer fiber of spacecraft served in high-altitude environment, such as the capsule body materials of airship in the stratosphere, the high-energy ultraviolet radiation and the aging effects of ozone in their working environment affect their service life seriously, but also increases the work risk factors[4-7].
In this paper, changes in mechanical properties and chemical structures were discussed in N2, O3 and air atmospheres.
The decline in mechanical properties of polyester fiber shows that fracture occurs in some molecular chains under UV irradiation in three different atmospheres.
When the gaps and cracks and other defects on the fibers surface increase, its mechanical properties, thermal properties and crystallization will all be influenced.
Especially the polymer fiber of spacecraft served in high-altitude environment, such as the capsule body materials of airship in the stratosphere, the high-energy ultraviolet radiation and the aging effects of ozone in their working environment affect their service life seriously, but also increases the work risk factors[4-7].
In this paper, changes in mechanical properties and chemical structures were discussed in N2, O3 and air atmospheres.
The decline in mechanical properties of polyester fiber shows that fracture occurs in some molecular chains under UV irradiation in three different atmospheres.
When the gaps and cracks and other defects on the fibers surface increase, its mechanical properties, thermal properties and crystallization will all be influenced.