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Online since: February 2019
Authors: A.V. Starunov, K.A. Shpanova, A.V. Arzumanova
The influences of the electrolysis modes and the electrolyte composition to a physical mechanical properties of the coating (wear resistance, firmness to corrosion, micro-hardness, internal stress, porosity, adhesion) were investigated.
The changing of mechanism for electroplated coating are may be a cause of any changes in the physical-mechanical properties of sediment.
The physical and mechanical properties of the nickel-cobalt-silicon oxide coating were investigated.
Balakai, Dependence of physic-mechanical properties of a nickel-cobalt-aluminum oxide composite electrolytic coating on the dispersity of the alloying component, Rus.
Byrylov, Properties of a nickel-boron-fluoroplastic electrolytic composite coating, Rus.
The changing of mechanism for electroplated coating are may be a cause of any changes in the physical-mechanical properties of sediment.
The physical and mechanical properties of the nickel-cobalt-silicon oxide coating were investigated.
Balakai, Dependence of physic-mechanical properties of a nickel-cobalt-aluminum oxide composite electrolytic coating on the dispersity of the alloying component, Rus.
Byrylov, Properties of a nickel-boron-fluoroplastic electrolytic composite coating, Rus.
Online since: July 2011
Authors: Qi Lin Zhao, Jian Guo Song, Li Chen, Yong Ding
A theoretical iterative calculation approach is suggested to predict the ultimate compressive stress of the combined structure and then the factors influencing the ultimate compressive stress are analyzed on the basis of this approach.
In order to attain more accurate results, the affection of multiaxial compression on the mechanical properties of GFRP should be taken into consideration.
One of the key factors affecting the predicted value of the combined structure ultimate compressive stress is the selected value for the CFRP rupture strain.
When the CFRP sheet confined GFRP short column is axially compressed, some mechanical properties of the core GFRP will vary with the variation of the axial pressure and corresponding lateral pressure, and cause nonlinear response of the CFRP confined GFRP short column.
The two groups of formulas are both introduced from existing literature, and are applicable to the FRP which is produced by good manufacturing process and of perfect mechanical properties.
In order to attain more accurate results, the affection of multiaxial compression on the mechanical properties of GFRP should be taken into consideration.
One of the key factors affecting the predicted value of the combined structure ultimate compressive stress is the selected value for the CFRP rupture strain.
When the CFRP sheet confined GFRP short column is axially compressed, some mechanical properties of the core GFRP will vary with the variation of the axial pressure and corresponding lateral pressure, and cause nonlinear response of the CFRP confined GFRP short column.
The two groups of formulas are both introduced from existing literature, and are applicable to the FRP which is produced by good manufacturing process and of perfect mechanical properties.
Online since: September 2017
Authors: M.A. Sosedkova, T.A. Lisovskaya, L.V. Radionova
We herein present a mathematical model of hot rolling temperature parameters that factors in how the strip temperature changes in the rolling stand and in the inter-stand gap as well as when metal is transported along the mill train.
Those parameters affect the plastic properties of the roll, the parameters of drafting, the energy and power parameters of the process, the structure and the quality of rolled products, etc.
The model to find the temperature of metals in the technological flow of the rolling mill is generally written as follows [1] , where is the temperature of the metal at the previous calculation point or the initial temperature, ; are the losses of temperature when the metal is being rolled or transported along the mill train, ; is heating of the metal during its deformation, ; is the increase in the temperature of the metal, induced by the heating devices of the mill, ; is the cooling of the metal, induced by the cooling devices of the same, ; are the factors affecting the changes in the roll temperature; are the factors contributing to the cooling of the metal when rolled or transported along the mill train; are the factors causing the heating of the roll during the plastic deformation process; are the heating devices in the rolling mill train; are the cooling devices in the rolling mill train.
The module is implemented as a software product based on the mathematical hot rolling model; it is designed to help study how the technological parameters of hot rolling affect the energy and power parameters of the process, the temperature parameters, the physical and chemical properties as well as the geometry of sheets.
Pesin, Choice of strategy and cooling modes of rolled products to achieve the required set of consumer properties, Ferrous metallurgy. 4 (2011) 64-69
Those parameters affect the plastic properties of the roll, the parameters of drafting, the energy and power parameters of the process, the structure and the quality of rolled products, etc.
The model to find the temperature of metals in the technological flow of the rolling mill is generally written as follows [1] , where is the temperature of the metal at the previous calculation point or the initial temperature, ; are the losses of temperature when the metal is being rolled or transported along the mill train, ; is heating of the metal during its deformation, ; is the increase in the temperature of the metal, induced by the heating devices of the mill, ; is the cooling of the metal, induced by the cooling devices of the same, ; are the factors affecting the changes in the roll temperature; are the factors contributing to the cooling of the metal when rolled or transported along the mill train; are the factors causing the heating of the roll during the plastic deformation process; are the heating devices in the rolling mill train; are the cooling devices in the rolling mill train.
The module is implemented as a software product based on the mathematical hot rolling model; it is designed to help study how the technological parameters of hot rolling affect the energy and power parameters of the process, the temperature parameters, the physical and chemical properties as well as the geometry of sheets.
Pesin, Choice of strategy and cooling modes of rolled products to achieve the required set of consumer properties, Ferrous metallurgy. 4 (2011) 64-69
Online since: October 2012
Authors: Wen Han, Jing Hong Liu, Xiao Hua Liu
Mechanical Properties Test Research on Mass Concrete
Mixed with Different Fly Ash Bulk Volume
LIU Jing Hong1, a, LIU Xiao Hua2, b and HAN Wen1, c
1 College of Urban and Rural Construction, Agricultural University of Hebei, Baoding 071001, China
2 The 6th Subsidiary of Hebei 4th Building Company, Baoding 071000, China
aliujinghongfree@sina.com, bliuxiaohua818@163.com, chanwen31960130@163.com
Keywords: fly ash; mass concrete; mechanical properties test
Abstract.
The cracking would affect the concrete structure’ durability and influenced the concrete’ mechanics performance.
But the reduction of cement consumption will significantly reduce the tensile properties of concrete.
Some Key Cement Factors that Control the Compatibility Between Naphthalalene-based Superplastizers and Ordinary Portland Cement[C].Sixth CANMET/ACI International Conference On Superplastizers and other Chemical Admixtures in Concrete.Nice,France 2000
The cracking would affect the concrete structure’ durability and influenced the concrete’ mechanics performance.
But the reduction of cement consumption will significantly reduce the tensile properties of concrete.
Some Key Cement Factors that Control the Compatibility Between Naphthalalene-based Superplastizers and Ordinary Portland Cement[C].Sixth CANMET/ACI International Conference On Superplastizers and other Chemical Admixtures in Concrete.Nice,France 2000
Online since: October 2007
Authors: Duk Lak Lee, You Hwan Lee, Sang Yoon Lee
The austenite grain coarsening does not occur
uniformly, hence it can affect mechanical properties such as tensile, fatigue and so on.
Introduction Recently, because of the economical stagnation, cost reduction of material has become an important factor.
The austenite grain coarsening does not occur uniformly, and this phenomenon can affect its mechanical properties such as tensile, fatigue, etc.
Zener has shown the relation between R and r the mean radii of matrix grains and dispersed particles as follows: 4 3 r R f β β = = (1) where fis the volume fraction of dispersed particles and βis the correction factor adjusting the pinning force.
It is understood that suitably controlling the free-Ti and the Thermomechanical history are important factors for both the fine precipitation and the normal austenite grain growth.
Introduction Recently, because of the economical stagnation, cost reduction of material has become an important factor.
The austenite grain coarsening does not occur uniformly, and this phenomenon can affect its mechanical properties such as tensile, fatigue, etc.
Zener has shown the relation between R and r the mean radii of matrix grains and dispersed particles as follows: 4 3 r R f β β = = (1) where fis the volume fraction of dispersed particles and βis the correction factor adjusting the pinning force.
It is understood that suitably controlling the free-Ti and the Thermomechanical history are important factors for both the fine precipitation and the normal austenite grain growth.
Online since: September 2011
Authors: Wei Liang Gao, Yun Peng Li
The maximum settlement of the structure is regarded as the index of underneath the subway construction and design in this article, the mechanical parameters for pipe shed reinforcement layer on a subway station passing through the existing structure is back analyzed by utilizing the orthogonal experiment design methods, and the mechanical integration properties parameters which is close to engineering practice including elastic modulus, Poisson ratio, cohesion and internal friction angle for the material in the pipe shed reinforcement area are got.
As for the factors, take 3 levels for the test, and the design factors level is shown as in table 1.
By visual analysis [6, 7] different level of test index mean value of factors and different factors range list in table 2.
Importance sequences of factors are listed in table 2 according to a rule that the bigger the range, the more important factor is.
Finally the combination of best level of factors is the optimal factor scheme.
As for the factors, take 3 levels for the test, and the design factors level is shown as in table 1.
By visual analysis [6, 7] different level of test index mean value of factors and different factors range list in table 2.
Importance sequences of factors are listed in table 2 according to a rule that the bigger the range, the more important factor is.
Finally the combination of best level of factors is the optimal factor scheme.
Online since: July 2007
Authors: Xiao Yan Lin, Xu Dong Li, Xing Dong Zhang
Low temperature in situ
synthesis method is an effective way to obtain biomimetic nanoHA/COL composites with good
homogeneity and mechanical properties [2].
Factors and levels used in this experiment are shown in Table 1.
There are three factors, each of which can be set at three different levels.
The greater the bending strength, the better the mechanical property of the composite is.
Factors and levels used in this experiment of the composites and synthesis pH.
Factors and levels used in this experiment are shown in Table 1.
There are three factors, each of which can be set at three different levels.
The greater the bending strength, the better the mechanical property of the composite is.
Factors and levels used in this experiment of the composites and synthesis pH.
Online since: February 2014
Authors: Rong Lu Sun, L.P. Song
The notch toughness properties were assessed in the PWHT condition and after a temper embrittlement step-cooling treatment. the J and X factors of the weld should be more rigorous than the base steel.
The stability of the carbide precipitates depends on the chemical composition of steel and tempering conditions, Factors affecting temper embrittlement of low alloy Cr–Mo steels are suggested to be as follows1-2: ①Chemical composition, ②Temperature, ③Holding time, ④Applied stress.
Among these factors, the effect of chemical composition is the most important.
As shown, ΔvTr54 ranged from 9 to 35℃, In all the four figures, welds B, C and D met the notch toughness requirement of 54 J at -40℃, weld C and D met the notch toughness requirement of 54 J at -29℃ after step cooling , only weld D met VTr54+3ΔVTr54≤0℃, So only weld D maintaining weld quality and providing acceptable mechanical properties.J-factor and X-factor have the same tendency with VTr54+3ΔVTr54 for all the test results.
Low Mn and Si content can satisfy the J , x and VTr54+3ΔVTr54 factors
The stability of the carbide precipitates depends on the chemical composition of steel and tempering conditions, Factors affecting temper embrittlement of low alloy Cr–Mo steels are suggested to be as follows1-2: ①Chemical composition, ②Temperature, ③Holding time, ④Applied stress.
Among these factors, the effect of chemical composition is the most important.
As shown, ΔvTr54 ranged from 9 to 35℃, In all the four figures, welds B, C and D met the notch toughness requirement of 54 J at -40℃, weld C and D met the notch toughness requirement of 54 J at -29℃ after step cooling , only weld D met VTr54+3ΔVTr54≤0℃, So only weld D maintaining weld quality and providing acceptable mechanical properties.J-factor and X-factor have the same tendency with VTr54+3ΔVTr54 for all the test results.
Low Mn and Si content can satisfy the J , x and VTr54+3ΔVTr54 factors
Online since: July 2011
Authors: Jing Long Gao, Dong Ming Li, Yan Hui Liu
The effects of CNTs content on the thermal properties and mechanical properties were mainly investigated.
Varying the combinations and architectures of these materials affects the material properties on the nanoscales and macroscales.
Influence of CNTs on the mechanical properties of the PP was studied.
The effects of CNTs content on mechanical properties of composites are listed in Table 1.
Table 1: Effects of CNTs content on mechanical properties of composites CNTS content [%] Tensile strength [Mpa] Elongation at break [%] 0 18.61 13.00 1 28.59 14.50 3 34.71 27.00 5 23.25 16.00 The improvement in the tensile properties arises from several factors.
Varying the combinations and architectures of these materials affects the material properties on the nanoscales and macroscales.
Influence of CNTs on the mechanical properties of the PP was studied.
The effects of CNTs content on mechanical properties of composites are listed in Table 1.
Table 1: Effects of CNTs content on mechanical properties of composites CNTS content [%] Tensile strength [Mpa] Elongation at break [%] 0 18.61 13.00 1 28.59 14.50 3 34.71 27.00 5 23.25 16.00 The improvement in the tensile properties arises from several factors.
Online since: February 2024
Authors: Mritunjay Kumar Singh, Anil Singh Yadav, Preeti Chincholkar, Ramesh Bokade, Neeraj Agarwal, Rohit Sahu, Jitendra Malviya, Gurjeet Singh
The mechanical properties of the final product are largely determined by the state of these fibers.
The most significant factors influencing mechanical properties in compression moulding are mould temperature, pressure, and heating time.Traditionally, the majority of researchers use the traditional experimental approach, in which they alter one parameter at a time while holding other variables constant.
The selection process involves evaluating factors such as risk, accuracy, product quality, and productivity.
"Processing and evaluation of mechanical properties of sisal and bamboo chemically treated hybrid composite."
"Optimization of molding process parameters for enhancing mechanical properties of jute fiber reinforced composites."
The most significant factors influencing mechanical properties in compression moulding are mould temperature, pressure, and heating time.Traditionally, the majority of researchers use the traditional experimental approach, in which they alter one parameter at a time while holding other variables constant.
The selection process involves evaluating factors such as risk, accuracy, product quality, and productivity.
"Processing and evaluation of mechanical properties of sisal and bamboo chemically treated hybrid composite."
"Optimization of molding process parameters for enhancing mechanical properties of jute fiber reinforced composites."