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Online since: March 2020
Authors: Veronika Blahnová, Jana Hlinkova, Radek Divin, Eva Filová, Karolína Vocetková, Evzen Amler
Growth factors belong among the basic tissue engineering tools.
Growth factors influence cell proliferation, differentiation, and maturation.
When extensive defects are formed, cartilage is not capable of full regeneration and ligamentous tissue with insufficient biomechanical properties develops.
The scaffold was shown to be biocompatible and biodegradable, allowing gradual growth factors release.
Mobasheri, “Mesenchymal stem cells: Identification, phenotypic characterization, biological properties and potential for regenerative medicine through biomaterial micro-engineering of their niche.,” Methods, Sep. 2015
Growth factors influence cell proliferation, differentiation, and maturation.
When extensive defects are formed, cartilage is not capable of full regeneration and ligamentous tissue with insufficient biomechanical properties develops.
The scaffold was shown to be biocompatible and biodegradable, allowing gradual growth factors release.
Mobasheri, “Mesenchymal stem cells: Identification, phenotypic characterization, biological properties and potential for regenerative medicine through biomaterial micro-engineering of their niche.,” Methods, Sep. 2015
Online since: September 2016
Authors: Marina M. Abramova, N.Yu. Dudareva, R.V. Kalschikov
The Methodology of the Researchs
The quality of the MAO-layer depends on many factors.
Many factors affect each other.
To determine the effect of process parameters on the properties of the coating MAO and its corrosion resistance is necessary to determine the effect of technological factors in the aggregate.
The same process factors influence the coating thickness (Eq. 4).
Dudzik, Mechanical properties of 5083, 5059 and 7020 aluminium alloys and their joints welded by MIG, J. of KONES Powertrain and Transport. 18 (2011) 73-77
Many factors affect each other.
To determine the effect of process parameters on the properties of the coating MAO and its corrosion resistance is necessary to determine the effect of technological factors in the aggregate.
The same process factors influence the coating thickness (Eq. 4).
Dudzik, Mechanical properties of 5083, 5059 and 7020 aluminium alloys and their joints welded by MIG, J. of KONES Powertrain and Transport. 18 (2011) 73-77
Online since: November 2013
Authors: Maryam Heidari, Maria Kashtalyan
One of the contributing factors to structural or functional failure of coatings is a mismatch of material properties between the coating and substrate at the coating/substrate interface.
Introduction Functionally graded materials (FGMs) are heterogeneous composite materials with gradual variation of the constituents (e.g. metallic and ceramic) from one surface of the material to the other which results in continuously varying material properties [1].
FGMs have a number of advantages that make them attractive in potential applications, such as a potential reduction of in-plane and transverse through-the-thickness stresses, an improved residual stress distribution, enhanced thermal properties, higher fracture toughness, and reduced stress intensity factors [2].
From the modelling point of view, FGMs represent a challenge since continuous variation of material properties leads to significant analytical and numerical difficulties.
The input file is consisting of the defined geometry, type of material properties, applied forces and boundary conditions.
Introduction Functionally graded materials (FGMs) are heterogeneous composite materials with gradual variation of the constituents (e.g. metallic and ceramic) from one surface of the material to the other which results in continuously varying material properties [1].
FGMs have a number of advantages that make them attractive in potential applications, such as a potential reduction of in-plane and transverse through-the-thickness stresses, an improved residual stress distribution, enhanced thermal properties, higher fracture toughness, and reduced stress intensity factors [2].
From the modelling point of view, FGMs represent a challenge since continuous variation of material properties leads to significant analytical and numerical difficulties.
The input file is consisting of the defined geometry, type of material properties, applied forces and boundary conditions.
Online since: December 2010
Authors: Erhard Schafler
Effect of Hydrostatic Pressure on the Microstructure and Mechanical Properties during and after High Pressure Torsion
Erhard Schaflera
Physics of Nanostructured Materials, Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Wien, Austria
aerhard.schafler@univie.ac.at
Keywords: Severe plastic deformation; Line broadening; High-pressure torsion; Dislocations; Hardness
Abstract.
Introduction Ultra-fine-grained nanocrystalline and materials processed by severe plastic deformation have been reported to reveal superior mechanical properties i.e. high strength, in coexistence with very good ductility [1-5].
However, with the same pre-factor D0 comprising diffusion-immanent properties, the diffusivity D also depends on the temperature T.
The conversion factors are listed in Table 3.
HV5(77K) / HV5(RT) HV5(RT) / HV0.1(RT) Cu 1.5 0.9 Ni 1.2 1.01 Table 3: Conversion factors from 77 K → RT and macrohardness → microhardness (HV5 → HV0.1) for Cu and Ni.
Introduction Ultra-fine-grained nanocrystalline and materials processed by severe plastic deformation have been reported to reveal superior mechanical properties i.e. high strength, in coexistence with very good ductility [1-5].
However, with the same pre-factor D0 comprising diffusion-immanent properties, the diffusivity D also depends on the temperature T.
The conversion factors are listed in Table 3.
HV5(77K) / HV5(RT) HV5(RT) / HV0.1(RT) Cu 1.5 0.9 Ni 1.2 1.01 Table 3: Conversion factors from 77 K → RT and macrohardness → microhardness (HV5 → HV0.1) for Cu and Ni.
Online since: March 2018
Authors: Napassavong Osothsilp, Jakkapan Jariyajirawatana
Quality of RCS depends on many crucial properties and some of them are mechanical properties.
The temperature of sand before releasing into the mixing process and the time to release each type of materials in the mixing process should be at proper levels to prevent premature curing or cross links between phenolic resin and hexamine, which affects mechanical properties of RCS [1].
The properties of sand and phenolic resin used in the type of RCS under study were shown in Table 1.
Properties of sands and phenolic resins in RCS under study.
It was found all factors significantly affected bending strength except for the time to release calcium stearate.
The temperature of sand before releasing into the mixing process and the time to release each type of materials in the mixing process should be at proper levels to prevent premature curing or cross links between phenolic resin and hexamine, which affects mechanical properties of RCS [1].
The properties of sand and phenolic resin used in the type of RCS under study were shown in Table 1.
Properties of sands and phenolic resins in RCS under study.
It was found all factors significantly affected bending strength except for the time to release calcium stearate.
Online since: August 2013
Authors: Zhen Hua Xie, Ting Ting Luan, Na He
The abandoned dump geotechnical materials determine its physical and mechanical properties.
The physical and mechanical properties of the geotechnical rock mass the degree composition, bulk density, water absorption, water retention, hardness, bond strength, rheological plastic change characteristics used to characterize the geotechnical properties of the physical aspects of the concept.
The physical and mechanical properties of the rock and soil are a major factor to determine the dump internal deformation or sliding.
Propulsion speed is an important factor affecting dump stability for soft ground dumping site and the high bench dump, the dump line.
Other Influencing Factors.
The physical and mechanical properties of the geotechnical rock mass the degree composition, bulk density, water absorption, water retention, hardness, bond strength, rheological plastic change characteristics used to characterize the geotechnical properties of the physical aspects of the concept.
The physical and mechanical properties of the rock and soil are a major factor to determine the dump internal deformation or sliding.
Propulsion speed is an important factor affecting dump stability for soft ground dumping site and the high bench dump, the dump line.
Other Influencing Factors.
Online since: October 2010
Authors: Mariano Paganelli, Daniele Paganelli
New development in the non contact optical measurement of thermo-mechanical properties of materials.
Abstract The optical measurement of thermo-mechanical properties allows the sample to be completely free from constraints.
The use of line cameras is unfeasible because the measurement will be strongly affected by edge imperfections.
The other key design factors are the increase of the green bulk density and the decrease of the fired bulk density, maintaining the overall physical and mechanical properties within the allowed range of water absorption and mechanical resistance.
Paganelli: “The properties of ceramic material during the firing process”, n. 55/2004 Ceramic World Review
Abstract The optical measurement of thermo-mechanical properties allows the sample to be completely free from constraints.
The use of line cameras is unfeasible because the measurement will be strongly affected by edge imperfections.
The other key design factors are the increase of the green bulk density and the decrease of the fired bulk density, maintaining the overall physical and mechanical properties within the allowed range of water absorption and mechanical resistance.
Paganelli: “The properties of ceramic material during the firing process”, n. 55/2004 Ceramic World Review
Online since: March 2008
Authors: Chu Hua Liang, Wen Jing Teng, Bi Sheng Zhou, Jian Ping Zhou, Yan Xu
The factors affecting surface quality of SEM include electrical characteristics, tool electrode
properties, workpiece machining properties, dielectric properties (Parameters affecting of SEAM are
shown in figure 3).
Tool electrode properties means tool electrode material properties, tool movement mode and tool loss properties.
Workpiece processing characteristic includes workpiece material properties, workpiece cutting depth, cutting feed rate and other factors.
Table 2 Orthogonal experimental program and the experimental results Factors experiment results NO.
The most critical factors are feed rate and cut depth.
Tool electrode properties means tool electrode material properties, tool movement mode and tool loss properties.
Workpiece processing characteristic includes workpiece material properties, workpiece cutting depth, cutting feed rate and other factors.
Table 2 Orthogonal experimental program and the experimental results Factors experiment results NO.
The most critical factors are feed rate and cut depth.
Online since: March 2009
Authors: Janina Adamus
Titanium and its alloys are noteworthy materials
because of their unique properties, which include low specific gravity (4.43 ÷ 4.85 g/cm
3), high
mechanical properties (tensile strength from Rm ≈ 240 MPa for commercially pure titanium Grade 1
to Rm ≈ 1750 MPa for heat treated beta alloys [6]) and good corrosion resistance.
Of the many factors which have a direct influence on the course of sheet-titanium forming processes, the values that can be controlled are: - geometrical factors such as: shape and size of the blank, corner radius of the die and punch, - external factors e.g. holding-down force and the way it is implemented, frictional conditions.
As friction is a very important factor affecting the course of the sheet-metal forming process, the proper selection of the technological lubricants and the determination of the area, which should be lubricated, is essential.
Gunawarmana, Mitsuo Niinomia, Toshikazu Akahoria, Junichi Takedaa, Hiroyuki Toda: Mechanical properties of Ti-4.5Al-3V-2Mo-2Fe and possibility for healthcare applications.
Gierzyńska-Dolna: Tribological properties of titanium alloys (in Polish).
Of the many factors which have a direct influence on the course of sheet-titanium forming processes, the values that can be controlled are: - geometrical factors such as: shape and size of the blank, corner radius of the die and punch, - external factors e.g. holding-down force and the way it is implemented, frictional conditions.
As friction is a very important factor affecting the course of the sheet-metal forming process, the proper selection of the technological lubricants and the determination of the area, which should be lubricated, is essential.
Gunawarmana, Mitsuo Niinomia, Toshikazu Akahoria, Junichi Takedaa, Hiroyuki Toda: Mechanical properties of Ti-4.5Al-3V-2Mo-2Fe and possibility for healthcare applications.
Gierzyńska-Dolna: Tribological properties of titanium alloys (in Polish).
Online since: June 2014
Authors: Jun Ye, Liang Zheng
In order to achieve the excellent control capability of electric drive systems, the mechanical properties and performance need to be investigated and evaluated.
In this paper, the lateral stability of four-wheel independent driving EVs is studied and the major factors are investigated.
In order to achieve the excellent control capability of electric drive systems, the mechanical properties and performance need to be investigated and evaluated.
Analytical study reveals that the sideslip angle and the yaw rate are two primary factors affect the lateral stability of the electric vehicles.
Segel, “An analysis of tire traction properties and their influence on vehicle dynamic performance,” SAE, Article ID 700377, pp. 1219–1243, 1970
In this paper, the lateral stability of four-wheel independent driving EVs is studied and the major factors are investigated.
In order to achieve the excellent control capability of electric drive systems, the mechanical properties and performance need to be investigated and evaluated.
Analytical study reveals that the sideslip angle and the yaw rate are two primary factors affect the lateral stability of the electric vehicles.
Segel, “An analysis of tire traction properties and their influence on vehicle dynamic performance,” SAE, Article ID 700377, pp. 1219–1243, 1970