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Online since: August 2019
Authors: Zhan Ping Zhang, Yu Hong Qi, Xu Zhao, Ke Jiao Li
The morphology, properties and applications of polyether PUA are determined by the microphase separation.
Cooper, Morphology and properties of segmented copolymers, American Chemical Society: USA,1979, pp. 3-30
Meadows, et al, Model MDI/butanediol polyurethanes: molecular structure, morphology, physical and mechanical properties, J.
Nomura, Structure and properties of fatigued segmented poly (urethaneurea) s Ⅲ.
Ko, Structure and thermal properties of polyether polyurethaneurea elastomers, J.
Cooper, Morphology and properties of segmented copolymers, American Chemical Society: USA,1979, pp. 3-30
Meadows, et al, Model MDI/butanediol polyurethanes: molecular structure, morphology, physical and mechanical properties, J.
Nomura, Structure and properties of fatigued segmented poly (urethaneurea) s Ⅲ.
Ko, Structure and thermal properties of polyether polyurethaneurea elastomers, J.
Online since: December 2014
Authors: Jörg Neumeyer, Egbert Baake, Aleksandr Nikanorov
Coupled electromagnetic and thermal analyses are carried out at each time step of simulation for correction of temperature dependent material properties.
Due to high cooling rates during the welding process, a different metallurgical structure and different mechanical properties compared to the base material occur in the seam and in the heat affected zone.
All of these influence factors and physical correlations have to be taken into account for the design and optimization of the HF induction tube welding process.
Thermal analysis with temperature dependent properties of steel includes also simulation of thermal losses by convection and radiation from all open surfaces of the calculated system.
They are based on coupled electromagnetic and thermal analyses with temperature dependent electro- and thermo-physical material properties.
Due to high cooling rates during the welding process, a different metallurgical structure and different mechanical properties compared to the base material occur in the seam and in the heat affected zone.
All of these influence factors and physical correlations have to be taken into account for the design and optimization of the HF induction tube welding process.
Thermal analysis with temperature dependent properties of steel includes also simulation of thermal losses by convection and radiation from all open surfaces of the calculated system.
They are based on coupled electromagnetic and thermal analyses with temperature dependent electro- and thermo-physical material properties.
Online since: November 2017
Authors: Corrado Piconi
So far, zirconia-toughened ceramics are replacing alumina because of their outstanding mechanical properties leading to high reliability in ceramic components.
A non-exhaustive synthesis of the present applications of bioinert ceramics in medical devices and of their mechanical properties are is illustrated in the following Tables 1 and 2.
The metastability of the tetragonal phase is the key of the interesting mechanical properties of zirconia, but is also the origin of its main drawback, e.g. the spontaneous transformation of the metastable tetragonal phase into monoclinic [19].
The incidence of noise in computer assisted total hip replacement with ceramic-on-ceramic bearing and risk factors analysis.
Factors affecting modular acetabular ceramic liner insertion: a biomechanical analysis.
A non-exhaustive synthesis of the present applications of bioinert ceramics in medical devices and of their mechanical properties are is illustrated in the following Tables 1 and 2.
The metastability of the tetragonal phase is the key of the interesting mechanical properties of zirconia, but is also the origin of its main drawback, e.g. the spontaneous transformation of the metastable tetragonal phase into monoclinic [19].
The incidence of noise in computer assisted total hip replacement with ceramic-on-ceramic bearing and risk factors analysis.
Factors affecting modular acetabular ceramic liner insertion: a biomechanical analysis.
Online since: January 2019
Authors: Yin Li Chen, He Wei, Zhi Wei Sun, Guang Hua Liu, Hai Feng Yan, Li Zhang Li, Lin Lin Liao
Due to the particularity of the application situation, there are high demands for the uniformity of its mechanical properties and the type and content of microstructure.
The comprehensive mechanical properties of steel can be improved by controlling the rolling process parameters and cooling process conditions reasonably [19-21].
As a result, the microstructure and mechanical properties of these parts differ from the surface.
At this rate, the microstructure is extremely detrimental to the mechanical properties of 20CrMnTi experimental steel, and enterprises should avoid such structures in the production process.
Furthermore, these factors also have a strong effect on Vickers hardness and tensile strength.
The comprehensive mechanical properties of steel can be improved by controlling the rolling process parameters and cooling process conditions reasonably [19-21].
As a result, the microstructure and mechanical properties of these parts differ from the surface.
At this rate, the microstructure is extremely detrimental to the mechanical properties of 20CrMnTi experimental steel, and enterprises should avoid such structures in the production process.
Furthermore, these factors also have a strong effect on Vickers hardness and tensile strength.
Online since: January 2018
Authors: Zbyněk Keršner, Hana Šimonová, Pavel Rovnaník, Libor Topolář, Pavel Schmid
Addition of graphite powder increases its electric conductivity, hence, introducing new functionality to building materials such as self-sensing and self-heating properties.
The mechanical properties and application possibilities of AAS are very similar to OPC based materials.
Although graphite is added to improve the sensing properties of the building material, it should not deteriorate its mechanical fracture properties.
Addition of graphite also affected fracture properties.
Keršner, Mechanical fracture properties of alkali-activated slag with graphite filler, Procedia Engineering, 2017, accepted for publication
The mechanical properties and application possibilities of AAS are very similar to OPC based materials.
Although graphite is added to improve the sensing properties of the building material, it should not deteriorate its mechanical fracture properties.
Addition of graphite also affected fracture properties.
Keršner, Mechanical fracture properties of alkali-activated slag with graphite filler, Procedia Engineering, 2017, accepted for publication
Online since: September 2013
Authors: Zhi Yong Li, Hong Li Liu, Zhi Peng Duan
In this paper micro-hole machining is regarded as the research object, effects of many factors such as power supply natures, electrolyte composition, pulse width and pulse frequency on machining accuracy in micro-hole ECM have been evaluated.
Various types of micro-structures such micro-shafts, micro-holes, micro-slots, micro-gears,micro-paddles and micro-motors are used in communication systems and micro-electro-mechanical systems (MEMS) widely[1,2].
Experimental research of ECM for Meso-scale micro-hole is mainly introduced in this paper, the technological factors which influence ECM accuracy of micro-hole are scrutinized and studied, which mainly include power supply natures, electrolyte composition, pulse width and pulse frequency.
Effects of Power properties on machining accuracy of micro-hole Effects of machining voltage on side gap(single gap) distribution of micro-hole when using DC electrochemical machining is studied firstly.
Mechanical Science and Technology, 25(2) (2006)242-245
Various types of micro-structures such micro-shafts, micro-holes, micro-slots, micro-gears,micro-paddles and micro-motors are used in communication systems and micro-electro-mechanical systems (MEMS) widely[1,2].
Experimental research of ECM for Meso-scale micro-hole is mainly introduced in this paper, the technological factors which influence ECM accuracy of micro-hole are scrutinized and studied, which mainly include power supply natures, electrolyte composition, pulse width and pulse frequency.
Effects of Power properties on machining accuracy of micro-hole Effects of machining voltage on side gap(single gap) distribution of micro-hole when using DC electrochemical machining is studied firstly.
Mechanical Science and Technology, 25(2) (2006)242-245
Online since: November 2020
Authors: Lenka Klakurková, Ladislav Čelko, Karel Slámečka, Jiří Švejcar, Ivana Ročňáková, Jozef Kaiser, David Jech, Petr Skalka, Daniel Holemý
The Influence of Surface Dipping and Bulk Filling Agents on Properties of High-Speed Grinding Wheels: Materialographic-Based Numerical Modelling
Ladislav Čelko1,a*, Petr Skalka1,b, Karel Slámečka1,c, David Jech1,d,
Lenka Klakurková1,e, Ivana Ročňáková1,f, Jiří Švejcar1,g,
Daniel Holemý2,h and Jozef Kaiser1,i
1Research Group of Materials Characterization and Advanced Coatings, Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
2Best - Business, a. s., Zbraslavecká 777, 679 72 Kunštát, Czech Republic
aladislav.celko@ceitec.vutbr.cz, bpetr.skalka@ceitec.vutbr.cz, ckarel.slamecka@ceitec.vutbr.cz, ddavid.jech@ceitec.vutbr.cz, elenka.klakurkova@ceitec.vutbr.cz, fivana.rocnakova@ceitec.vutbr.cz, gjiri.svejcar@ceitec.vutbr.cz, hdaniel.holemy@bestb.cz, ijosef.kaiser@ceitec.vutbr.cz
Keywords: Grinding tools, Structure, Scanning electron microscopy, FE Analysis, Surface dipping, Bulk filling.
Furthermore, porosity is one of the most important factors influencing the performance of the grinding wheel [3].
Besides cooling and removal of the chips and abrasive generated during the grinding process, porosity, together with volumetric composition of the wheel affect mechanical properties and thus determine operational constraints.
The properties of present material components were assumed to be as follows: the Young’s modulus E = 1150 GPa and Poisson’s ratio n = 0.15 for abrasive grains, and E = 300 GPa and n = 0.27 for the binder.
Furthermore, porosity is one of the most important factors influencing the performance of the grinding wheel [3].
Besides cooling and removal of the chips and abrasive generated during the grinding process, porosity, together with volumetric composition of the wheel affect mechanical properties and thus determine operational constraints.
The properties of present material components were assumed to be as follows: the Young’s modulus E = 1150 GPa and Poisson’s ratio n = 0.15 for abrasive grains, and E = 300 GPa and n = 0.27 for the binder.
Online since: May 2014
Authors: Min Li, Qiang Jiang, Xiao Ying Zhang, Li Qun Chen
It is efficient, rapid and accurate for solid, liquid, powder and other organic matter samples of physical, mechanical and chemical properties .Now, it is widely attention and application [1~3].
In some cases, it is very serious, which affects the prediction correction of model establishment and composition or nature of unknown samples.
In the situation that the absorbance and the concentration of samples have good linear relationship and the chemical properties are similar, MSC shows good correction effect.
The NIR spectrum is affected by many factors, such as: effects of collinearity, physical properties, scattering.
In some cases, it is very serious, which affects the prediction correction of model establishment and composition or nature of unknown samples.
In the situation that the absorbance and the concentration of samples have good linear relationship and the chemical properties are similar, MSC shows good correction effect.
The NIR spectrum is affected by many factors, such as: effects of collinearity, physical properties, scattering.
Online since: July 2022
Authors: Pierre Montmitonnet, Leyne Demoulin, Zineb Zahar, Achraf El Mekkaoui, Arnaud Reignier, Pierre Emmanuel Leger, Katia Mocellin
Of course, a HAZ forms, with mechanical properties slightly different from the hot rolled metal, but its effect is left for future work.
Temperature increase is small (low rolling speed) and negligible impact on mechanical properties has been assumed.
Mechanical properties.
It is used in the following for the weld metal, but also in the parametric study on the austenitic strip mechanical properties.
The present study has confirmed the importance of risk factors qualitatively pointed out in the scarce technical literature.
Temperature increase is small (low rolling speed) and negligible impact on mechanical properties has been assumed.
Mechanical properties.
It is used in the following for the weld metal, but also in the parametric study on the austenitic strip mechanical properties.
The present study has confirmed the importance of risk factors qualitatively pointed out in the scarce technical literature.
Online since: September 2008
Authors: Jerzy Jedlinski
It should be noted that despite of the vast
evidence of experimental data it is still not clear whether the observed differences are associated
more with kinetic or more with mechanistic effects, i.e. it needs to be verified whether the rate of
the processes or their mechanisms are affected by the material, oxidation conditions and/or other
factors.
Statement of the Problem and Description of the Approach Description of alumina formers oxidation should involve several factors which may affect this process as well as refer them to the degradation process.
Mechanical effects are related to the stress generation and relief in the scale-substrate system as well as to interfacial phenomena.
It follows from it that there are other factors but composition which affect the oxidation resistance.
The mentioned response to stresses depends significantly on the material properties in terms of its deformation propensity and interfacial strength.
Statement of the Problem and Description of the Approach Description of alumina formers oxidation should involve several factors which may affect this process as well as refer them to the degradation process.
Mechanical effects are related to the stress generation and relief in the scale-substrate system as well as to interfacial phenomena.
It follows from it that there are other factors but composition which affect the oxidation resistance.
The mentioned response to stresses depends significantly on the material properties in terms of its deformation propensity and interfacial strength.