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Online since: April 2018
Authors: Ekaterina Robertovna Matek, Vadim Andreevich Pechenin, Michael Alexandrovich Bolotov, Nikolay Vladimirovich Ruzanov
Features of the design and principle of the sensor included strain gages cause the presence of factors affecting the accuracy of measurements (Fig. 7).
Factors affecting the accuracy of measurements by strain gages During the experiments, a significant influence of the vibrations of the site, where the measuring sensor is located, on the measurement results was revealed.
Impact of other factors on the measurement error were also revealed, and their elimination is possible on further device study.
[12] Kovalenko, P., Perepelkina, S., Korakhanov, T., Investigation of tribological properties of friction pairs duralumin – fluoropolymer used for design and manufacturing of biomechatronic devices, Tribology in Industry, 2017, V. 39, №2, pp. 192-197
[13] Alekseev, V.P., Khaimovich, A.I., Testing criterion models of destruction of materials with different rheological properties under edge cutting machining, -Key Engineering Materials, 2015, V. 684, pp. 13-20
Factors affecting the accuracy of measurements by strain gages During the experiments, a significant influence of the vibrations of the site, where the measuring sensor is located, on the measurement results was revealed.
Impact of other factors on the measurement error were also revealed, and their elimination is possible on further device study.
[12] Kovalenko, P., Perepelkina, S., Korakhanov, T., Investigation of tribological properties of friction pairs duralumin – fluoropolymer used for design and manufacturing of biomechatronic devices, Tribology in Industry, 2017, V. 39, №2, pp. 192-197
[13] Alekseev, V.P., Khaimovich, A.I., Testing criterion models of destruction of materials with different rheological properties under edge cutting machining, -Key Engineering Materials, 2015, V. 684, pp. 13-20
Online since: February 2012
Authors: Yuan Gang Wang, Meng Hua Wu, Hu Wang, Xiao Peng Li, Yu Liu
Liu et al. [10] studied the effect of skin effect on Micro-EDM, and argued discharge energy difference caused by skin effect was an important factor of electrode wear.
Due to electrode wear affected by various factors, it is difficult to use a single factor method to accurately describe its change trend.
Many factors, such as skin effect, edge electric field concentration and debris, are studied by COMSOL Multiphysics simulation software in this paper.
In a period of time, the distribution of discharge points concentrated in certain areas since discharge was affected by some factors including electric field centralization of rim, skin effect and debris distribution.
Changes in material properties of electrode in its rim and side can improve the accuracy of Micro-EDM.
Due to electrode wear affected by various factors, it is difficult to use a single factor method to accurately describe its change trend.
Many factors, such as skin effect, edge electric field concentration and debris, are studied by COMSOL Multiphysics simulation software in this paper.
In a period of time, the distribution of discharge points concentrated in certain areas since discharge was affected by some factors including electric field centralization of rim, skin effect and debris distribution.
Changes in material properties of electrode in its rim and side can improve the accuracy of Micro-EDM.
Online since: October 2014
Authors: Shi Feng Liu, Zhao Hui Zhang, Huiping Tang, Xin Yang
Porous structure is one of the key factors that influence the intrinsic properties and the effect of the porous material.
How to scientifically characterize the macro and micro structure of porous material and its’ impact on the material properties is the basis for its preparation and application.
Therefore, this dissertation adopted fractal geometry theory to study the pore structure, calculated pore structure fractal dimension and the relationship between fractal dimension and material properties[5-10].
Results and analysis Analysis of the influencing factors to calculate the fractal dimension The main factors of the box-counting dimension calculating the fractal dimension are the threshold size, resolution and magnification.
Yu. the Chinese Society of Mechanical Academic Conference 2005.
How to scientifically characterize the macro and micro structure of porous material and its’ impact on the material properties is the basis for its preparation and application.
Therefore, this dissertation adopted fractal geometry theory to study the pore structure, calculated pore structure fractal dimension and the relationship between fractal dimension and material properties[5-10].
Results and analysis Analysis of the influencing factors to calculate the fractal dimension The main factors of the box-counting dimension calculating the fractal dimension are the threshold size, resolution and magnification.
Yu. the Chinese Society of Mechanical Academic Conference 2005.
Online since: September 2011
Authors: Long Quan Shao, Ning Wen, Bin Deng, Yuan Fu Yi, Ting Sun, Shan Yu Zhou
Thickness is an important correlative factor for the relative translucency of IPS E.max LT framework materials.
Introduction IPS E.max system was superior to IPS Empress II system in mechanical properties and esthetics[1].
In this study contrast ratios of IPS E.max framework materials and chromatic values of IPS E.max blanks were measured with a calibrated spectrophotometer to study the correlative factors of relative translucency providing foundations for technical procedures.
The difference might be because of different thicknesses of specimens or better optical property of IPS e.max core materials.
Ceramics of high translucence allow more light to enter and scatter, which means that the underlying tooth affects the resultant color greatly.
Introduction IPS E.max system was superior to IPS Empress II system in mechanical properties and esthetics[1].
In this study contrast ratios of IPS E.max framework materials and chromatic values of IPS E.max blanks were measured with a calibrated spectrophotometer to study the correlative factors of relative translucency providing foundations for technical procedures.
The difference might be because of different thicknesses of specimens or better optical property of IPS e.max core materials.
Ceramics of high translucence allow more light to enter and scatter, which means that the underlying tooth affects the resultant color greatly.
Online since: September 2019
Authors: L'Hadi Atoui, Kaltoum Digheche, Farida Khamouli, Adel Saoudi, Mosbah Zidani
In addition, cellulosic electrodes are recommended when the mechanical properties of the deposit are of the greatest importance [10].The flux properties may be influenced by interaction between the mixed flux components, but the effect of theses interactions has not been studied [11].Weld metal (WM) chemical composition is determined by base metal dilution, electrode wire composition, and any pyro-metallurgical chemical reactions in the molten metal [7].The microstructure and mechanical properties of shielded metal-arc (SMAW) multi-pass welds have been discussed in previous papers [12-15].
During cooling, these inclusions serve as nucleation centers for acicular ferrite [13, 16].It is found that the contents of MnO, TiO2 and Al2O3 inclusions affect the acicular ferrite fraction, which directly affects the toughness properties of the weld metal [17].
The variation in mechanical properties across the weld can be attributed to several factors such as residual stresses after welding, grain size non-metallic inclusions distribution and.
Evans, The effect of chromium on the microstructure and properties of C–Mn all-weld metal deposits.
Diaz, E.Diaz Valdez, Effect of TiO2-containing fluxes on the mechanical properties and microstructure in submerged-arc weld steels, Materials Characterization, 60 (1)(2009)36-39
During cooling, these inclusions serve as nucleation centers for acicular ferrite [13, 16].It is found that the contents of MnO, TiO2 and Al2O3 inclusions affect the acicular ferrite fraction, which directly affects the toughness properties of the weld metal [17].
The variation in mechanical properties across the weld can be attributed to several factors such as residual stresses after welding, grain size non-metallic inclusions distribution and.
Evans, The effect of chromium on the microstructure and properties of C–Mn all-weld metal deposits.
Diaz, E.Diaz Valdez, Effect of TiO2-containing fluxes on the mechanical properties and microstructure in submerged-arc weld steels, Materials Characterization, 60 (1)(2009)36-39
Online since: August 2007
Authors: Michael J. Pomeroy, Stuart Hampshire, Annaik Genson, Amir R. Hanifi
An Introduction to the Glass Formation and Properties of Ca-Si-Al-O-N-F
Glasses
A.
Ca-Sialon glasses have been known for some time [1] and they are effectively calciumalumino-silicate glasses containing nitrogen which improves their mechanical properties.
Properties of Ca-Si-Al-O-N-F glasses.
Table 2 shows the thermal properties of Ca28Si57Al15 with different anion compositions.
The changes in properties of glasses in this system with varying anion ratio show that nitrogen increases the Tg and mechanical properties, acting as a cross linking agent while fluorine decreases these properties and appears to be a network disrupting agent.
Ca-Sialon glasses have been known for some time [1] and they are effectively calciumalumino-silicate glasses containing nitrogen which improves their mechanical properties.
Properties of Ca-Si-Al-O-N-F glasses.
Table 2 shows the thermal properties of Ca28Si57Al15 with different anion compositions.
The changes in properties of glasses in this system with varying anion ratio show that nitrogen increases the Tg and mechanical properties, acting as a cross linking agent while fluorine decreases these properties and appears to be a network disrupting agent.
Online since: April 2017
Authors: E.V.M. Carrasco, V.D. Pizzol, M.A. Smits, J.N.R. Mantilla, R.C. Alves, P.V. Krüger, M.A.P. Rezende
The tests for determining the shear strength are performed in Brazil in accordance with standard [3], according to the procedures provided in Annex B" Determination of the wood properties for design of structures " and, so far, does not require rigorous presentation of the test results taking into consideration the calculation of the uncertainty of measurement, as can be seen in [4].
The references [7, 8] emphasize that several studies are performed in the specific area of the timber in order to identify the factors that affect the physical and mechanical properties of this organic material, either inherent in the wood and also the environmental factors in which it develops.
These variations often occur due to age, anatomic element position analyzed in the tree, genetic and environmental factors, etc.
In the analysis of the factors affecting the measurement of a material must be considered that the behavior of biological organisms (such as plant species) is highly dependent on the environmental conditions of the laboratory [5, 7, 8], that is, the magnitude of the influence that, according to [9] are not measured, however, affect the outcome of this measurement.
So the comprehensiveness factor, k95% is determined by Eq. 12, from the students distribution with degrees of freedom effective (veff) which is determined by the formula of Welch-Satterhwaite, Eq. 13.
The references [7, 8] emphasize that several studies are performed in the specific area of the timber in order to identify the factors that affect the physical and mechanical properties of this organic material, either inherent in the wood and also the environmental factors in which it develops.
These variations often occur due to age, anatomic element position analyzed in the tree, genetic and environmental factors, etc.
In the analysis of the factors affecting the measurement of a material must be considered that the behavior of biological organisms (such as plant species) is highly dependent on the environmental conditions of the laboratory [5, 7, 8], that is, the magnitude of the influence that, according to [9] are not measured, however, affect the outcome of this measurement.
So the comprehensiveness factor, k95% is determined by Eq. 12, from the students distribution with degrees of freedom effective (veff) which is determined by the formula of Welch-Satterhwaite, Eq. 13.
Online since: May 2020
Authors: Winarto Winarto, Eddy S. Siradj, Herry Oktadinata
However, the excellent mechanical properties can be disturbed by the local heating during fusion welding, producing poor impact toughness in the weld metal and heat-affected zone (HAZ).
The mechanical properties of SM570-TMC and E81-Ni1 are presented in Table 2.
Chemical composition and mechanical properties of parent metal SM570-TMC were measured from experimental material, while the E81-Ni1 wire properties were as received.
It may affect to degrade the mechanical properties.
Wang, Effect of heat input and M-A constituent on microstructure evolution and mechanical properties of the heat-affected zone in low carbon steel, Journal of Wuhan University of Technology-Mater.
The mechanical properties of SM570-TMC and E81-Ni1 are presented in Table 2.
Chemical composition and mechanical properties of parent metal SM570-TMC were measured from experimental material, while the E81-Ni1 wire properties were as received.
It may affect to degrade the mechanical properties.
Wang, Effect of heat input and M-A constituent on microstructure evolution and mechanical properties of the heat-affected zone in low carbon steel, Journal of Wuhan University of Technology-Mater.
Online since: June 2017
Authors: Jing Hua Gong, Jing Hong Ma, Li Peng, Jia Ni Huan
Among them, the most widely investigated materials are temperature and pH responsive hydrogels because both of them are important affecting environmental factors for human body.
There still are some problems, such as poor mechanical properties and the inability to control the size and shape of fibers.
Thus, PNIPA network is used to form interpenetrating network (IPN) with Ca-alginate in order to provide temperature response, and also improve mechanical property.
Different diameter of PNIPA/Ca-alginate hydrogel fibers was prepared by changing core and sheath relative flow rates and their swelling properties were investigated.
Mechanical property.
There still are some problems, such as poor mechanical properties and the inability to control the size and shape of fibers.
Thus, PNIPA network is used to form interpenetrating network (IPN) with Ca-alginate in order to provide temperature response, and also improve mechanical property.
Different diameter of PNIPA/Ca-alginate hydrogel fibers was prepared by changing core and sheath relative flow rates and their swelling properties were investigated.
Mechanical property.
Online since: December 2011
Authors: Zeng Liang Gao, Zhao Ji Hu, Wen Feng Tu
Right after the loading direction was changed, the crack growth rate was decreased rapidly, and crack growth paths under the stress redistribution zone (SRZ) were affected.
The chemical composition, microstructures and mechanical properties of 16MnR steel was summarized in an earlier paper [6].
The elastic properties were and .
According to the formula proposed by Richard [2], the equivalent stress intensity factor was obtained
According to the formula proposed by Richard, the equivalent stress intensity factor was obtained.
The chemical composition, microstructures and mechanical properties of 16MnR steel was summarized in an earlier paper [6].
The elastic properties were and .
According to the formula proposed by Richard [2], the equivalent stress intensity factor was obtained
According to the formula proposed by Richard, the equivalent stress intensity factor was obtained.