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Online since: January 2010
Authors: Amauri Garcia, Pedro R. Goulart, Ileao L. Ferreira, D.J. Moutinho, L.G. Gomes, O.L. Rocha
Garcia
3,f
1
Fluminense Federal University, Department of Mechanical Engineering.
Fine dendritic microstructures in castings, characterized by the dendrite arm spacing are recognized to yield superior mechanical properties if compared to coarser ones.
Much research has been devoted to the definition of the factors affecting the fineness of the dendritic structure.
The thermophysical properties of this alloy were determined by the ThermoCalc software, with the exception of thermal conductivities [17].
Thermophysical properties of the Al-6wt%Cu-1wt%Si alloy used in the numerical simulation Properties Units Al-6wt%Cu-1wt%Si Liquidus temperature - TL °C 638 Initial Eutectic Temperature TEI oC 530.2 Final Eutectic Temperature - TEE °C 527.6 Silicon Transformation Temperature - TSi °C 513.2 Fusion temperature - TF °C 660 Thermal conductivity (solid) - kS W.m -1.K-1 180 Thermal conductivity (liquid) - kL W.m -1.K-1 87.9 Density (solid) - ρS kg.m-3 2713.4 Density (liquid) - ρL kg.m-3 2529.5 Specific heat (solid) - cS J.kg -1.K-1 1063 Specific heat (Liquid) - cL J.kg -1.K-1 1125 Latent heat of fusion - ∆H1 at 638 ≤ T < 530.25 oC J.kg -1 289600 Latent heat of fusion - ∆H2 at 530.25 ≤ T < 527.54 oC J.kg -1 15800 Latent heat of fusion - ∆Heut at T = 527.55 oC J.kg -1 57200 Liquidus slope - Cu Lm °C.
Fine dendritic microstructures in castings, characterized by the dendrite arm spacing are recognized to yield superior mechanical properties if compared to coarser ones.
Much research has been devoted to the definition of the factors affecting the fineness of the dendritic structure.
The thermophysical properties of this alloy were determined by the ThermoCalc software, with the exception of thermal conductivities [17].
Thermophysical properties of the Al-6wt%Cu-1wt%Si alloy used in the numerical simulation Properties Units Al-6wt%Cu-1wt%Si Liquidus temperature - TL °C 638 Initial Eutectic Temperature TEI oC 530.2 Final Eutectic Temperature - TEE °C 527.6 Silicon Transformation Temperature - TSi °C 513.2 Fusion temperature - TF °C 660 Thermal conductivity (solid) - kS W.m -1.K-1 180 Thermal conductivity (liquid) - kL W.m -1.K-1 87.9 Density (solid) - ρS kg.m-3 2713.4 Density (liquid) - ρL kg.m-3 2529.5 Specific heat (solid) - cS J.kg -1.K-1 1063 Specific heat (Liquid) - cL J.kg -1.K-1 1125 Latent heat of fusion - ∆H1 at 638 ≤ T < 530.25 oC J.kg -1 289600 Latent heat of fusion - ∆H2 at 530.25 ≤ T < 527.54 oC J.kg -1 15800 Latent heat of fusion - ∆Heut at T = 527.55 oC J.kg -1 57200 Liquidus slope - Cu Lm °C.
Online since: March 2007
Authors: Kotaro Kuroda, Ryoichi Ichino, Masazumi Okido
The
properties for the coated samples were studied using XRD, EDX, FT-IR, and SEM.
Introduction Calcium phosphates, specifically HAp (Ca10(PO4)6(OH)2), are of interest in bone-interfacing implant applications because of their demonstrated osteoconductive properties[1].
Hydroxyapatite is considered to be a bioactive material, and is used in the fabrication of medical and dental implants, usually in the form of a coating on a metallic substrate to compensate for its poor intrinsic mechanical properties.
The properties of the coated samples were studied using X-ray diffraction (XRD), energy dispersive X-ray analysis (EDX), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM).
The surface morphology is considered to be one of the most important factors in the behavior of cells.
Introduction Calcium phosphates, specifically HAp (Ca10(PO4)6(OH)2), are of interest in bone-interfacing implant applications because of their demonstrated osteoconductive properties[1].
Hydroxyapatite is considered to be a bioactive material, and is used in the fabrication of medical and dental implants, usually in the form of a coating on a metallic substrate to compensate for its poor intrinsic mechanical properties.
The properties of the coated samples were studied using X-ray diffraction (XRD), energy dispersive X-ray analysis (EDX), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM).
The surface morphology is considered to be one of the most important factors in the behavior of cells.
Online since: April 2021
Authors: Mathias Bobbert, Gerson Meschut, Max Böhnke, Christian Roman Bielak, Moritz Rossel
In particular, the frictional behavior between the sheet metals affects the geometrical formation of the clinched joint significantly.
Since the test setup is one of the instrumented tests, an independent consideration of the influencing factors is possible.
Furthermore, the occurring friction is influenced by various factors that are relevant in forming processes, for example contact pressure, relative speed, temperature and surface change due to abrasion or adhesion wear.
A separation of the specimens using machine cutting processes, wire erosion or water jet cutting is not reasonable, as this processes use cooling lubricants or other media, which may change the surface condition or friction properties.
Numerical simulation was used to determine the properties of such a mounting.
Since the test setup is one of the instrumented tests, an independent consideration of the influencing factors is possible.
Furthermore, the occurring friction is influenced by various factors that are relevant in forming processes, for example contact pressure, relative speed, temperature and surface change due to abrasion or adhesion wear.
A separation of the specimens using machine cutting processes, wire erosion or water jet cutting is not reasonable, as this processes use cooling lubricants or other media, which may change the surface condition or friction properties.
Numerical simulation was used to determine the properties of such a mounting.
Online since: October 2011
Authors: H.H. Masjuki, A.M. Liaquat, M.A. Kalam, A. Rasyidi
Rasyidi1
1Department of Mechanical Engineering, University of Malaya, Kuala Lumpur, Malaysia
aliaquat2@yahoo.com
Keywords: WSD; co-efficient of frictio; jatropha oil; four-ball Tribotester
Abstract.
RESULTS AND DISCUSSION All the samples preparation and test are conducted at Engine Tribology Laboratory, Department of Mechanical Engineering, University of Malaya.
The figures show how the different percentages of JO affect on COF.
Viscosity Index (VI) Analysis Viscosity is the property used for identification of individual grades of lube oil and for monitoring the changes occurring in the lube oil while in service.
Haseeb, “Effect of mechanical factors on tribological properties of palm oil methyl ester blended lubricant,” Wear, vol. 239(1), pp. 117–125, 2000.
RESULTS AND DISCUSSION All the samples preparation and test are conducted at Engine Tribology Laboratory, Department of Mechanical Engineering, University of Malaya.
The figures show how the different percentages of JO affect on COF.
Viscosity Index (VI) Analysis Viscosity is the property used for identification of individual grades of lube oil and for monitoring the changes occurring in the lube oil while in service.
Haseeb, “Effect of mechanical factors on tribological properties of palm oil methyl ester blended lubricant,” Wear, vol. 239(1), pp. 117–125, 2000.
Online since: August 2021
Authors: Megdi Eltayeb
Electrosprayed nanoparticles can protect environmental factors reactions, it is beneficial to capture nourishment enhance earlier to utilize in nourishments or refreshments.
Encapsulation prevents ethyl maltol from responding to environmental factors such as oxygen and water, thereby providing stabilized ethyl maltol, enhancing self-life and bioavailability.
Surface tension and viscosity are the important properties of the electrosprayed nanoparticle solutions that influence the development of nanoparticles in the electrospraying technique, both of which are affected by the concentration of electrosprayed nanoparticles [15].
The physical properties of ethyl maltol in the solvent-dissolved ethylcellulose and stearic acid (ethanol).
Zhang, Nanoparticles fabricated from bulk solid lipids: Preparation, properties, and potential food applications.
Encapsulation prevents ethyl maltol from responding to environmental factors such as oxygen and water, thereby providing stabilized ethyl maltol, enhancing self-life and bioavailability.
Surface tension and viscosity are the important properties of the electrosprayed nanoparticle solutions that influence the development of nanoparticles in the electrospraying technique, both of which are affected by the concentration of electrosprayed nanoparticles [15].
The physical properties of ethyl maltol in the solvent-dissolved ethylcellulose and stearic acid (ethanol).
Zhang, Nanoparticles fabricated from bulk solid lipids: Preparation, properties, and potential food applications.
Online since: September 2014
Authors: Fernando M.A. Henriques, Luis G. Baltazar
The performance of these masonries relies on their monolithic behaviour rather than on the mechanical properties of their individual elements.
This vulnerability under certain types of loads is due to several factors, such as: absence of cohesion between the external elements i.e. poor transversal bonds between the leaves of the wall and weakness of the inner core.
Moreover, flow time is also reduced with the increase of water/binder ratio; nevertheless this can lead to a worsening of hardened grout by reducing its mechanical properties.
Correlation between flow tests and rheological properties.
Therefore, further experimental research is needed to know how the differences in the properties between the present NHL and other NHLs might affect the modelling results.
This vulnerability under certain types of loads is due to several factors, such as: absence of cohesion between the external elements i.e. poor transversal bonds between the leaves of the wall and weakness of the inner core.
Moreover, flow time is also reduced with the increase of water/binder ratio; nevertheless this can lead to a worsening of hardened grout by reducing its mechanical properties.
Correlation between flow tests and rheological properties.
Therefore, further experimental research is needed to know how the differences in the properties between the present NHL and other NHLs might affect the modelling results.
Online since: May 2020
Authors: N.V. Romanova, Lenar N. Shafigullin, Gulgena D. Shakirova
Introduction
Physical mechanical and thermal stability of a material is the primary factor responsible for quality of polymer vehicle components.
In order to evaluate the influence of the cross-linking degree (synthesis reaction) on the properties of a material, it has been investigated how heat treatment of a vehicle component part made of rigid PUF affects thermal physical and mechanical characteristics of the material.
Bazhenov, Mechanical properties and processing of composite materials, Dolgoprudny, Intellekt Publ., 2014
Shafigullina, Investigation of physical-mechanical and performance properties of glass fiber reinforced polyurethane materials used in the machine building industry, Proc.
Shafigullina, Analysis of physical and mechanical properties of polyurethane facade thermal panels used in civil construction.
In order to evaluate the influence of the cross-linking degree (synthesis reaction) on the properties of a material, it has been investigated how heat treatment of a vehicle component part made of rigid PUF affects thermal physical and mechanical characteristics of the material.
Bazhenov, Mechanical properties and processing of composite materials, Dolgoprudny, Intellekt Publ., 2014
Shafigullina, Investigation of physical-mechanical and performance properties of glass fiber reinforced polyurethane materials used in the machine building industry, Proc.
Shafigullina, Analysis of physical and mechanical properties of polyurethane facade thermal panels used in civil construction.
Online since: July 2025
Authors: Qonitah Fardiyah, Barlah Rumhayati, Azaria Ivana Ramadani
The performance of electrodes in the microplastic removal process using the electrocoagulation method is influenced by several factors, including electrolysis time, voltage intensity, electrolyte concentration and others.
The presence of electrons in the solution can affect the rate of electrochemical reactions.
The electrochemical equilibrium that occurs is the balance between the microplastic removal rate and factors that hinder microplastic removal efficiency, such as excessive sediment formation on the electrode, high foam production, and the possibility of microplastic deflocculation.
Xing, “Dynamic membrane for micro-particle removal in wastewater treatment: Performance and influencing factors,” Sci.
Staszak, “Study of surface properties of aqueous solutions of sodium dodecyl sulfate in the presence of hydrochloric acid and heavy metal ions,” J.
The presence of electrons in the solution can affect the rate of electrochemical reactions.
The electrochemical equilibrium that occurs is the balance between the microplastic removal rate and factors that hinder microplastic removal efficiency, such as excessive sediment formation on the electrode, high foam production, and the possibility of microplastic deflocculation.
Xing, “Dynamic membrane for micro-particle removal in wastewater treatment: Performance and influencing factors,” Sci.
Staszak, “Study of surface properties of aqueous solutions of sodium dodecyl sulfate in the presence of hydrochloric acid and heavy metal ions,” J.
Online since: October 2018
Authors: Markku Keskitalo, Kari Mäntyjärvi, Antti Järvenpää, Mikko Hietala, Aappo Mustakangas, Tero Jokelainen
Laser welding can be utilized to decrease the production costs (high velocity, one side welding, etc), but also to optimize the panel properties due to low heat input in laser welding.
Mechanical properties of the test materials are shown in Table 1 and the flow curves in Fig. 3.
Tensile properties for the test materials [Data taken from ref. 10].
Plastic properties were taken into account by utilizing the tensile test results (Fig. 3.).
Sandwich panels with different structural dimensions were tested to determine the role of the panel properties on buckling resistance.
Mechanical properties of the test materials are shown in Table 1 and the flow curves in Fig. 3.
Tensile properties for the test materials [Data taken from ref. 10].
Plastic properties were taken into account by utilizing the tensile test results (Fig. 3.).
Sandwich panels with different structural dimensions were tested to determine the role of the panel properties on buckling resistance.
Online since: December 2011
Authors: A.M. Salcedo-Garrido, H. Mendoza-León, Thierry Baudin, Richard Penelle, Francisco Cruz-Gandarilla
Anisotropy of physical and mechanical properties of textured polycrystalline materials strongly depends on microstructural characteristics, such as subgrain sizes, lattice deformations, etc.
Generalized Pole Figures (GPF) [1] are an attempt to estimate the anisotropy of these properties; so, the energy stored during plastic deformation is a key parameter in primary recrystallization.
Introduction Anisotropic polycrystalline materials (bulk and thin films) show microstructural parameters that affect their properties, i.e. grain and subgrain size, lattice deformations, crystallographic texture, presence of different phase, etc.
The stored energy values vary about a factor 3 to 6.
Delhez, Th.H. de Keijser and E.Mittemeijer, Profile Analysis for Microcrystalline Properties by the Fourier and Other Methods, Aust.
Generalized Pole Figures (GPF) [1] are an attempt to estimate the anisotropy of these properties; so, the energy stored during plastic deformation is a key parameter in primary recrystallization.
Introduction Anisotropic polycrystalline materials (bulk and thin films) show microstructural parameters that affect their properties, i.e. grain and subgrain size, lattice deformations, crystallographic texture, presence of different phase, etc.
The stored energy values vary about a factor 3 to 6.
Delhez, Th.H. de Keijser and E.Mittemeijer, Profile Analysis for Microcrystalline Properties by the Fourier and Other Methods, Aust.