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Online since: August 2019
Authors: Luisa Rovero, Gianfranco Stipo, Giulia Misseri, Stefano Galassi
Recent research supported the definition of guidelines on testing methods for TRM systems applied to masonry, but further investigation is needed to clear out the role played by the numerous factors affecting the strengthening capacity.
So, shear bond tests provide a closer representation of the actual response mechanism of a TRM, but results are influenced by many other factors, e.g.
Recently, in [12], where a wide group of experimental bond tests on TRM systems is considered, it is highlighted indeed that some relation between mechanical properties of the substrate and the strains attained by the TRM jacket to which is adhered can be recognised.
Mechanical properties of lime-based mortar are, according to the datasheet: compressive strength, fc = 15MPa, flexure strength fb = 5MPa, Young’s modulus in compression, Ec = 9GPa.
For the basalt textile, mechanical properties reported in the datasheet are: tensile strength, ftf = 1700MPa, Young’s modulus in tension, Etf = 70GPa, and ultimate tensile strain, εtf = 0.019.
So, shear bond tests provide a closer representation of the actual response mechanism of a TRM, but results are influenced by many other factors, e.g.
Recently, in [12], where a wide group of experimental bond tests on TRM systems is considered, it is highlighted indeed that some relation between mechanical properties of the substrate and the strains attained by the TRM jacket to which is adhered can be recognised.
Mechanical properties of lime-based mortar are, according to the datasheet: compressive strength, fc = 15MPa, flexure strength fb = 5MPa, Young’s modulus in compression, Ec = 9GPa.
For the basalt textile, mechanical properties reported in the datasheet are: tensile strength, ftf = 1700MPa, Young’s modulus in tension, Etf = 70GPa, and ultimate tensile strain, εtf = 0.019.
Online since: February 2021
Authors: Dmitry M. Rozhkov, Evgenia V. Eltoshkina, Petr I. Ilyin, Olga A. Svirbutovich
The only possible way to restore the seats of cylinder blocks that have internal surface wear should be considered galvanic, since other methods do not provide the required coating properties [1, 2, 3, 4].
At the same time, attention is paid to the non-developed method for obtaining electroplating due to the fact that this method has a number of advantages and advantages [6, 7, 9]; the possibility of obtaining local coatings with specified properties and high performance.
Further increase in speed does not affect the increase in .
Figure 3 clearly shows changes in electrochemical parameters depending on technological factors.
The formation of dendrites was observed at = 1.20 A∙cm-2.Consequently, the area of investigation of the influence of the cathode current density on the mechanical properties of the coating was determined from =0.10 A∙cm-2 to =2.00 A∙cm-2.As the current density increases, the hydrogen overvoltage increases faster and the current output increases.
At the same time, attention is paid to the non-developed method for obtaining electroplating due to the fact that this method has a number of advantages and advantages [6, 7, 9]; the possibility of obtaining local coatings with specified properties and high performance.
Further increase in speed does not affect the increase in .
Figure 3 clearly shows changes in electrochemical parameters depending on technological factors.
The formation of dendrites was observed at = 1.20 A∙cm-2.Consequently, the area of investigation of the influence of the cathode current density on the mechanical properties of the coating was determined from =0.10 A∙cm-2 to =2.00 A∙cm-2.As the current density increases, the hydrogen overvoltage increases faster and the current output increases.
Online since: April 2014
Authors: Jun Yao Ye, Ying Lian Wang, Ke Ning Liu
Research on Ceramic Manufacturing for Creating and Solving Ceramic Formulations Model
Junyao Ye 1, a, Kening Liu1, a,Yinglian Wang 2,b
1 College of Information Engineering, Jingdezhen Ceramic Institute, Jingdezhen, China
2 College of Mechanical and Electronic Engineering, Jingdezhen Ceramic Institute, Jingdezhen, China
a lailul@163.com, b sdwyl@126.com
Keywords: Ceramic Formulation; Optimization; Formulation Model; Matrix Solving.
The structure and composition of ceramic materials determine their properties, any material in the ceramic formulation has a slight change, which will have an impact on the performance of ceramic, so the optimization on the design is very important.
The chemical composition of the blank is the main factor affecting the performance of ceramic products, while the main factors affecting the performance of ceramics include minerals, micro-particles and colloidal content index.
In the design on ceramic formulation, we focus on the content of chemical composition calculated by the raw materials, not considering factors such as the price of raw materials.
Material Specifications of Advanced Ceramics and Other Issues in the Use of Property Databases with Corrosion Analysis Models [J].
The structure and composition of ceramic materials determine their properties, any material in the ceramic formulation has a slight change, which will have an impact on the performance of ceramic, so the optimization on the design is very important.
The chemical composition of the blank is the main factor affecting the performance of ceramic products, while the main factors affecting the performance of ceramics include minerals, micro-particles and colloidal content index.
In the design on ceramic formulation, we focus on the content of chemical composition calculated by the raw materials, not considering factors such as the price of raw materials.
Material Specifications of Advanced Ceramics and Other Issues in the Use of Property Databases with Corrosion Analysis Models [J].
Online since: October 2013
Authors: Zong Qiang Zeng, Mao Fang Huang, Chun Liang Yang, Zhi Xiong Liang, Xian Zhou Xiao, Kai Dian Wang
Rubber processing analyzer and Thermogravimetric Analyze the difference between the properties of dry rubber and vulcanized rubber produced by Micro-cut Tapping with Gas-stimulation.
It was indicated that control sample spresent higher molecular weight and mechanical properties.
Plasticity retention index (PRI) of micro-cutting samples was higher than that of control, which was an evident to better properties such as anti-oxidation and anti-aging.
Figure 5 shows that the loss modulus of the rubber material by Micro-cut Tapping with Gas-stimulation is smaller than control, and it has good heat aging properties.
Micro-cut Tapping with Gas-stimulation technique affected the flow properties of natural rubber molecules.
It was indicated that control sample spresent higher molecular weight and mechanical properties.
Plasticity retention index (PRI) of micro-cutting samples was higher than that of control, which was an evident to better properties such as anti-oxidation and anti-aging.
Figure 5 shows that the loss modulus of the rubber material by Micro-cut Tapping with Gas-stimulation is smaller than control, and it has good heat aging properties.
Micro-cut Tapping with Gas-stimulation technique affected the flow properties of natural rubber molecules.
Online since: November 2005
Authors: J.C. Soares, C.E. Viana, D.P. Dias, P.H.B. Azevedo, Amilcar Soares
The
practicability of the use of the alkalis opens new opportunities for the production of special binders
with properties different from those presented by the ordinary Portland cement.
Besides the chemical composition, the mechanical strength of these alkali-activated materials depends a lot on the reactivity of the raw material, property that is influenced mainly by the specific surface area and crystalline degree of the raw material.
The chemical composition and physical properties of the KS are detailed in Table 1. 3.2.
The chemical composition and physical properties of OPC used to prepare mortar specimens are also detailed in Table 1.
A fixed sandto-cementitious binder ratio 3:1 was used to avoid the influence of factors related to the mortar mix design. 3.6.
Besides the chemical composition, the mechanical strength of these alkali-activated materials depends a lot on the reactivity of the raw material, property that is influenced mainly by the specific surface area and crystalline degree of the raw material.
The chemical composition and physical properties of the KS are detailed in Table 1. 3.2.
The chemical composition and physical properties of OPC used to prepare mortar specimens are also detailed in Table 1.
A fixed sandto-cementitious binder ratio 3:1 was used to avoid the influence of factors related to the mortar mix design. 3.6.
Online since: October 2006
Authors: Tessaleno C. Devezas, Ana M. Segadães, Abílio P. Silva
Table 1 Properties of the three ingredient classes of the matrix.
The software Statistica was used first to calculate valid models (response surfaces) that describe the matrix properties.
Two regions of high flowability (FI>150%) can clearly be seen, evidencing the effect of two major factors that promote it: the lubricating effect of a high amount of water (dominant in the AR-poor region) and the optimisation of the PSD (dominant in the AR-rich region).
Conclusions In the design of a particle composition for a SFRC, it is fundamental to minimise the matrix volume in the mixture because it adversely affects the sintered castable properties, such as mechanical strength (MoR) and dimensional stability (LS).
By doing this, the MPT value is highest and the sintered castable properties are the least affected.
The software Statistica was used first to calculate valid models (response surfaces) that describe the matrix properties.
Two regions of high flowability (FI>150%) can clearly be seen, evidencing the effect of two major factors that promote it: the lubricating effect of a high amount of water (dominant in the AR-poor region) and the optimisation of the PSD (dominant in the AR-rich region).
Conclusions In the design of a particle composition for a SFRC, it is fundamental to minimise the matrix volume in the mixture because it adversely affects the sintered castable properties, such as mechanical strength (MoR) and dimensional stability (LS).
By doing this, the MPT value is highest and the sintered castable properties are the least affected.
Online since: April 2025
Authors: Ismail Mohammad Amir Husni, Yusoff Mahani, Wan Nik Wan Mohd Norsani, Teo Pao Ter, Razali Mohd Hasmizam
Metal fillers have become increasingly popular due to their favorable thermal conductivity, and chemical, mechanical, and physical properties.
By taking advantage of the resistance to corrosion and good mechanical properties of Cu-Zn-Al2O3 nanocomposite, the study of the UPR-Cu-Zn-Al2O3 nanocomposite processing and properties should be carried out.
Fractal characterization of electrical conductivity and mechanical properties of copper particulate polyester matrix composites using image processing.
An examination of microstructure, mechanical and dry wear properties of stir cast brass/Al2O3 composites.
Review of microstructures and properties of zinc Alloys.
By taking advantage of the resistance to corrosion and good mechanical properties of Cu-Zn-Al2O3 nanocomposite, the study of the UPR-Cu-Zn-Al2O3 nanocomposite processing and properties should be carried out.
Fractal characterization of electrical conductivity and mechanical properties of copper particulate polyester matrix composites using image processing.
An examination of microstructure, mechanical and dry wear properties of stir cast brass/Al2O3 composites.
Review of microstructures and properties of zinc Alloys.
Online since: December 2013
Authors: Yeon Wook Kim, Jae Hoon Kim, Bo Hwi Seo, Hoon Seok Choi, Sung Han Park, Hwan Kyu Lee
In this study, graphite as a sealing material for a high temperature gas control valve has been examined based on the factors that affect wear properties in a reciprocating wear test.
The mechanical properties and microstructures of W-25Re are reported at ambient the temperatures 1,371℃ and 1,926℃, after processing by three methods which are hot iso-static pressing, swaging, and extrusion.
Table 1 and 2 show the mechanical properties of graphite, HK-6 and rhenium alloy W-25Re which is reported in this research [6,7].
In general, specific wear rate are evaluated to compare wear properties.
(3) Where X1, X2, . . , Xk are the input factors which affect the response Y andk is the number of input factors asβ0, βi(i=1, 2, . . , k) and βij(i=1,2, . . , k, j=1,2, . . , k)are the unknown parameters (regression coefficients or parameters) and ε is random error.
The mechanical properties and microstructures of W-25Re are reported at ambient the temperatures 1,371℃ and 1,926℃, after processing by three methods which are hot iso-static pressing, swaging, and extrusion.
Table 1 and 2 show the mechanical properties of graphite, HK-6 and rhenium alloy W-25Re which is reported in this research [6,7].
In general, specific wear rate are evaluated to compare wear properties.
(3) Where X1, X2, . . , Xk are the input factors which affect the response Y andk is the number of input factors asβ0, βi(i=1, 2, . . , k) and βij(i=1,2, . . , k, j=1,2, . . , k)are the unknown parameters (regression coefficients or parameters) and ε is random error.
Online since: May 2023
Authors: Lesybeth M. Nubatonis, Liesbetini Hartoto, Khaswar Syamsu, Endang Warsiki
Some crucial factors that affect ultrasonication are time and amplitude.
The contour of two-dimensional and three-dimensional plots of the effect of time and amplitude factors on the degree of crystallinity of nanocellulose.
[16] Khashayar V, Ghasem A, Seyed HS, Bio nanocomposites based on cationic starch reinforced with montmorillonite and cellulose nanocrystals: fundamental properties and biodegradability study, J.
[19] Vasconcelos Niedja F, Feitosa Judith PA, Gama Francisco MP, Morais Joao PS, Andrade Fabia K, Filho Men de Sa MS, Rosa Morsyleide S, Bacterial cellulose nanocrystals produced under different hydrolysis conditions: Properties and morphological feature, Carbohydrate Polymers 155 (2017) 425-431
[20] Halib N, Amin MCIM, Physicochemical properties and characterization of nata de coco from local food industries as of cellulose, Sains Malaysia 41 (2012) 205- 211
The contour of two-dimensional and three-dimensional plots of the effect of time and amplitude factors on the degree of crystallinity of nanocellulose.
[16] Khashayar V, Ghasem A, Seyed HS, Bio nanocomposites based on cationic starch reinforced with montmorillonite and cellulose nanocrystals: fundamental properties and biodegradability study, J.
[19] Vasconcelos Niedja F, Feitosa Judith PA, Gama Francisco MP, Morais Joao PS, Andrade Fabia K, Filho Men de Sa MS, Rosa Morsyleide S, Bacterial cellulose nanocrystals produced under different hydrolysis conditions: Properties and morphological feature, Carbohydrate Polymers 155 (2017) 425-431
[20] Halib N, Amin MCIM, Physicochemical properties and characterization of nata de coco from local food industries as of cellulose, Sains Malaysia 41 (2012) 205- 211
Online since: August 2016
Authors: Yi Li, Dong Yan Lin
The mechanical properties of A6016 are derived from the DYNAFORM material library.
Therefore, the blank holder force (A), the maximum forming depth (B) and the drawbead height (C) are chosen as the three main factors to research in the orthogonal experiment.
In the meanwhile, the orthogonal experiment is carried out based on the three main factors with three levels.
Factors No.
Tekiner, An experimental study on the examination of springback of sheet metals with several thicknesses and properties in bending dies, J.
Therefore, the blank holder force (A), the maximum forming depth (B) and the drawbead height (C) are chosen as the three main factors to research in the orthogonal experiment.
In the meanwhile, the orthogonal experiment is carried out based on the three main factors with three levels.
Factors No.
Tekiner, An experimental study on the examination of springback of sheet metals with several thicknesses and properties in bending dies, J.