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Online since: July 2013
Authors: C.R. Halkyard, Patrice Masson
The use of energy flow vectors for localisation requires a priori knowledge of the material properties, but may provide more direct access to position information than conventional techniques.
Introduction The mechanical properties of a composite material can be severely degraded by impact damage that is barely detectable by visual inspection.
If the material properties are known, the vibrational energy flow vector appears to have some potential as a tool for source location and quantification in orthotropic plates.
As the proposed measurement technique requires a priori knowledge of the material properties, this assumption places no additional restriction on the approach.
The variation of the condition number with frequency is also an influencing factor.
Introduction The mechanical properties of a composite material can be severely degraded by impact damage that is barely detectable by visual inspection.
If the material properties are known, the vibrational energy flow vector appears to have some potential as a tool for source location and quantification in orthotropic plates.
As the proposed measurement technique requires a priori knowledge of the material properties, this assumption places no additional restriction on the approach.
The variation of the condition number with frequency is also an influencing factor.
Online since: November 2016
Authors: Tomohiro Sasaki, Kenta Suzuki, Yasuyuki Owada, Shuhei Kuroiwa, Daisuke Shimosaka, Toshiya Anami
The coarse recrystallized grains obtained by controlling the salt bath annealing conditions are expected to contribute in improving the properties of Al–Fe–Ni–Si alloy fin stocks of automotive heat exchangers.
Reduction in the fin thickness reduces the weight of the automotive heat exchanger and thus improves mechanical properties, corrosion resistance, and brazeability [1].
Research explored factors determining recrystallization behavior in a twin-roll continuously cast Al–Fe–Ni alloy, and discontinuous recrystallization due to particle stimulated nucleation was presumed to be suppressed by the fine dispersion of particles [4].
As is widely known, the recrystallization behavior was affected by secondary particles and solid solute atoms in the aluminum matrix.
Fine dispersoids less than 0.1 μm are influential factors on recovery and recrystallization.
Reduction in the fin thickness reduces the weight of the automotive heat exchanger and thus improves mechanical properties, corrosion resistance, and brazeability [1].
Research explored factors determining recrystallization behavior in a twin-roll continuously cast Al–Fe–Ni alloy, and discontinuous recrystallization due to particle stimulated nucleation was presumed to be suppressed by the fine dispersion of particles [4].
As is widely known, the recrystallization behavior was affected by secondary particles and solid solute atoms in the aluminum matrix.
Fine dispersoids less than 0.1 μm are influential factors on recovery and recrystallization.
Online since: March 2019
Authors: Quy Hoang Van, Tuyen Bui Ngoc
For the main goal to enhance the geometric accuracy of the machined surface, three factors (feed rate, step over and tool path) with three levels for each factor are used in the study by the use of Taguchi L9 (3^3) array.
One advantage of this method is that multiple factors are considered at once, including noise factors.
Properties Symbol End mill Ball End mill (mm) (mm) 1 Nominal Diameter D 12 10 2 Corner Radius Rc x 5 3 Overall Length L 75 75 4 Cutting length Lc 30 28 5 Length l 34 32 6 Body diameter db 12 10 7 Noncutting diameter Dnc 0 0 Figure 4.
There are other parameters that could also be controlled, like cutting speed, depth of cut, radius or others geometrical parameter of tool… However, these parameters are more restricted and are associated to the properties of tools and they are not chosen in the study.
Value of the levels are defined based on many factors.
One advantage of this method is that multiple factors are considered at once, including noise factors.
Properties Symbol End mill Ball End mill (mm) (mm) 1 Nominal Diameter D 12 10 2 Corner Radius Rc x 5 3 Overall Length L 75 75 4 Cutting length Lc 30 28 5 Length l 34 32 6 Body diameter db 12 10 7 Noncutting diameter Dnc 0 0 Figure 4.
There are other parameters that could also be controlled, like cutting speed, depth of cut, radius or others geometrical parameter of tool… However, these parameters are more restricted and are associated to the properties of tools and they are not chosen in the study.
Value of the levels are defined based on many factors.
Online since: September 2018
Authors: Evgeniy Shcherban', Sergey Stel'makh, Anatoliy I. Shuyskiy, Mukhuma P. Nazhuev
Furthermore, optimal and efficient use of material properties throughout the entire structure of a construction is guaranteed.
Petrov, Technology and Properties of Centrifuged Concrete with A Combined Aggregate for Supports of the Contact Network, Rostov-on-Don, 1983
[7] Radzhan Suval, Properties of centrifuged concrete and perfection of design of centrifuged reinforced concrete pillars of power transmission lines, Rostov-on-Don, 1997
Galkin, The Influence of Technological Factors on the Properties of Non-Autoclaved Aerated Concrete, Inženernyj vestnik Dona (Rus). 2 (2017)
Shatalov, Effect of a Structuring Additive on the Physical and Mechanical Properties of Non-Autoclaved Aerated Concrete, Inženernyj vestnik Dona (Rus). 2 (2017).
Petrov, Technology and Properties of Centrifuged Concrete with A Combined Aggregate for Supports of the Contact Network, Rostov-on-Don, 1983
[7] Radzhan Suval, Properties of centrifuged concrete and perfection of design of centrifuged reinforced concrete pillars of power transmission lines, Rostov-on-Don, 1997
Galkin, The Influence of Technological Factors on the Properties of Non-Autoclaved Aerated Concrete, Inženernyj vestnik Dona (Rus). 2 (2017)
Shatalov, Effect of a Structuring Additive on the Physical and Mechanical Properties of Non-Autoclaved Aerated Concrete, Inženernyj vestnik Dona (Rus). 2 (2017).
Online since: September 2024
Authors: Vitalii Vekshyn, Olexandr Sincheskul, Hanna Koloskova, Volodymyr Koloskov
In this case, both metals can be considered as substrate materials due to their physical and chemical properties.
It is known from the literature [22], that compounds of aluminum, iron and manganese has catalytic properties, which can positively affect the activity of the catalysts.
Adhesion strength depends on many factors: surface preparation, film thickness, porosity, etc.
Blanco-García, A review of measurement techniques of mechanical properties of the catalyst layer in catalytic converters.
Kuki, An Evaluation of Mechanical Properties with the Hardness of Building Steel Structural Members for Reuse by NDT.
It is known from the literature [22], that compounds of aluminum, iron and manganese has catalytic properties, which can positively affect the activity of the catalysts.
Adhesion strength depends on many factors: surface preparation, film thickness, porosity, etc.
Blanco-García, A review of measurement techniques of mechanical properties of the catalyst layer in catalytic converters.
Kuki, An Evaluation of Mechanical Properties with the Hardness of Building Steel Structural Members for Reuse by NDT.
Online since: September 2015
Authors: Qingyuan Wang, Muhammad Kashif Khan
The top 10 most cited papers in VHCF
Article
Author
Journals
Year
No. of Citations
Factors influencing the mechanism of superlong fatigue failure in steels
Murakami et al.
Ueda, Factors influencing the mechanism of superlong fatigue failure in steels.
Yamaguchi, Gigacycle failure properties for high strength low alloy steel at 100 Hz, 600 Hz and 20kHz.
Oguma, Characteristic S–N properties of high-carbon–chromium-bearing steel under axial loading in long-life fatigue.
Oguma, Characteristic S–N properties of high-carbon–chromium-bearing steel under axial loading in long-life fatigue.
Ueda, Factors influencing the mechanism of superlong fatigue failure in steels.
Yamaguchi, Gigacycle failure properties for high strength low alloy steel at 100 Hz, 600 Hz and 20kHz.
Oguma, Characteristic S–N properties of high-carbon–chromium-bearing steel under axial loading in long-life fatigue.
Oguma, Characteristic S–N properties of high-carbon–chromium-bearing steel under axial loading in long-life fatigue.
Online since: September 2024
Authors: Bai Narsu, Yi'ao Jia, Yehejong Saqier
Concurrently, the scales of these nano-devices is increasingly reduced, necessitating research into the mechanical properties of nano-thin films at even smaller scales [1-3].
In such cases, their mechanical properties exhibit distinctly different characteristics [4-6].
Therefore, studying the mechanical properties of ultra-thin and nano-thin films is of positive significance for the development of nano-devices and NEMS [8-12].
Specifically, to describe the elastic properties of ultra-thin (less than 10 nm) nanofilms, we start with the elastic properties of thick nanofilms.
Shenoy, Size-dependent elastic properties of nanosized structural elements.
In such cases, their mechanical properties exhibit distinctly different characteristics [4-6].
Therefore, studying the mechanical properties of ultra-thin and nano-thin films is of positive significance for the development of nano-devices and NEMS [8-12].
Specifically, to describe the elastic properties of ultra-thin (less than 10 nm) nanofilms, we start with the elastic properties of thick nanofilms.
Shenoy, Size-dependent elastic properties of nanosized structural elements.
Online since: January 2014
Authors: Ivan Baránek
The starting material in the low–pressure formed of boron nitride, which has a hexagonal crystal structure and properties similar to graphite.
Surface integrity Properties and performance of all manufactured parts are related to the quality-or integrity- of the part´s surfaces.
The surface finish influences not only the dimensional accuracy of machined parts, but also their properties.
Factors influencing surface integrity are temperatures generated during processing, residual stresses, metallurgical (phase) transformations, and surface plastic deformation, tearing, and cracking.
Surface integrity describes not only topological - geometric - aspects of surfaces, but also their mechanical and metallurgical properties and characteristics [6].
Surface integrity Properties and performance of all manufactured parts are related to the quality-or integrity- of the part´s surfaces.
The surface finish influences not only the dimensional accuracy of machined parts, but also their properties.
Factors influencing surface integrity are temperatures generated during processing, residual stresses, metallurgical (phase) transformations, and surface plastic deformation, tearing, and cracking.
Surface integrity describes not only topological - geometric - aspects of surfaces, but also their mechanical and metallurgical properties and characteristics [6].
Online since: December 2007
Authors: W. R. Tyson
Introduction
This paper deals with material selection and characterization of mechanical properties.
While a great deal of basic and applied work has been done on microstructural control of properties, it must be borne in mind that the properties are useful in the context of delivery of performance for particular applications.
In the case of material properties to resist fracture, our ability to predict performance in terms of properties has improved dramatically over the past few decades.
However, as strength increases it becomes increasingly difficult to ensure adequate toughness in the weld metal and heat-affected zone (HAZ) regions.
A particular challenge for weldment assessment is to account for inhomogeneity; the base metal, HAZ, and weld metal normally have significantly different properties and it is important to ensure that the fatigue pre-crack samples the microstructure of interest.
While a great deal of basic and applied work has been done on microstructural control of properties, it must be borne in mind that the properties are useful in the context of delivery of performance for particular applications.
In the case of material properties to resist fracture, our ability to predict performance in terms of properties has improved dramatically over the past few decades.
However, as strength increases it becomes increasingly difficult to ensure adequate toughness in the weld metal and heat-affected zone (HAZ) regions.
A particular challenge for weldment assessment is to account for inhomogeneity; the base metal, HAZ, and weld metal normally have significantly different properties and it is important to ensure that the fatigue pre-crack samples the microstructure of interest.
Online since: January 2011
Authors: Can Can Lv, Cheng Jin Zhang, Hong Jun Ni, Ping Liao
The excellent PEM proton of DEFC must have better transmission capacity and high separate properties.
The proton conductivity properties and resistance properties of alcohol is improved effectively and it can have better battery performance and fuel efficiency.
Properties of membranes were characterized by alcohol resistance coefficient of ethanol P (cm2 / s).
Analysis of Alcohol Resistance Properties.
The 5% weight loss in the range from 200℃ to 260℃ is attributed to the dehydration of SiO2 under high temperature and other factors.
The proton conductivity properties and resistance properties of alcohol is improved effectively and it can have better battery performance and fuel efficiency.
Properties of membranes were characterized by alcohol resistance coefficient of ethanol P (cm2 / s).
Analysis of Alcohol Resistance Properties.
The 5% weight loss in the range from 200℃ to 260℃ is attributed to the dehydration of SiO2 under high temperature and other factors.