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Online since: December 2013
Authors: M.Y. Noordin, Denni Kurniawan, Ani Idris, N.H.A. Ngadiman
However, solution concentration is not the only factor that affects the diameter of fiber formation.
Such interactions between various factors were reported by Haghi and Akbari [18] in their research.
Rivin, Electospun fiber mats: transport properties.
Filtration properties of electrospinning nanofibers.
Shuler , Chwee Teck Lim, Controlled biomineralization of electrospun poly(e-caprolactone) fibers to enhance their mechanical properties.
Such interactions between various factors were reported by Haghi and Akbari [18] in their research.
Rivin, Electospun fiber mats: transport properties.
Filtration properties of electrospinning nanofibers.
Shuler , Chwee Teck Lim, Controlled biomineralization of electrospun poly(e-caprolactone) fibers to enhance their mechanical properties.
Online since: October 2016
Authors: Chen Li, Fei Hu Zhang, Xiao Shuang Rao
Thereafter, the abrasion of the softened material and pits takes place by mechanical diamond grinding wheel.
From the equation, the gap voltage is one main factor to discharge energy.
The typical material properties of this RB-SiC ceramic are listed in Table 2.
Chinese Journal of Mechanical Engineering. 44 (2008) 132-135
Journal of Mechanical Science & Technology, 27 (2013) 177-183.
From the equation, the gap voltage is one main factor to discharge energy.
The typical material properties of this RB-SiC ceramic are listed in Table 2.
Chinese Journal of Mechanical Engineering. 44 (2008) 132-135
Journal of Mechanical Science & Technology, 27 (2013) 177-183.
Online since: September 2013
Authors: Jozef Žarnovský, Petr Valášek, Miroslav Müller
Micro-particles of recycled rubber affect the mechanical qualities of polymer in which they are dispersed.
Epoxy resin properties can be changed by adding appropriate types of fillers.
They reached an improvement of failure properties of epoxy resins.
Subramaniyan et al. [6] used rubber particles for improving the mechanical properties of polyurethane foam filled with Kenaf fibres.
Garcia et al. [9] dealt with the influence of a different particle size of waste rubber on the mechanical properties of composite arising by compressing.
Epoxy resin properties can be changed by adding appropriate types of fillers.
They reached an improvement of failure properties of epoxy resins.
Subramaniyan et al. [6] used rubber particles for improving the mechanical properties of polyurethane foam filled with Kenaf fibres.
Garcia et al. [9] dealt with the influence of a different particle size of waste rubber on the mechanical properties of composite arising by compressing.
Online since: June 2011
Authors: Ahsan Ali Khan, Afifah Mohd Ali, Yeakub Ali Mohammad
Minimizing the effects of heat allows metals to be cut without harming or changing intrinsic properties.
Other surface properties such as fatigue resistance will also be influenced negatively by surface contaminants.
Its mechanical properties are tabulated in Table 1 below.
Table 1: Mechanical properties of the Mild Steel Property Material Density 7,860 kg/m3 Hardness (Rockwell) 24 HRB Elongation 30% Tensile strength 400 MPa Yield strength 250 MPa Zone A Zone B Zone C The cut surface Fig. 1: Zone of Analysis Analysis Methodology In this research, two methods of analysis are decided to be used.
Qualitek 4, it can be concluded that, the most significant factors that affect the contamination embedment are the feed rate and the abrasive flow rate.
Other surface properties such as fatigue resistance will also be influenced negatively by surface contaminants.
Its mechanical properties are tabulated in Table 1 below.
Table 1: Mechanical properties of the Mild Steel Property Material Density 7,860 kg/m3 Hardness (Rockwell) 24 HRB Elongation 30% Tensile strength 400 MPa Yield strength 250 MPa Zone A Zone B Zone C The cut surface Fig. 1: Zone of Analysis Analysis Methodology In this research, two methods of analysis are decided to be used.
Qualitek 4, it can be concluded that, the most significant factors that affect the contamination embedment are the feed rate and the abrasive flow rate.
Online since: January 2012
Authors: Zhen Feng, Yong Da, Wei Lin, Na Wang
Test study on the dynamic parameters of compound
composite foundation
WANG Na, FENG Zhen, DA Yong, LIN Wei
Institute of disaster prevention, Yanjiao, Hebei, China, 065201
E-mail: wngeomag@126.com
Key words: composite foundation;dynamic triaxial test;dynamic properties;empirical equation
Abstract: Influence of factors such as displacement ratio and confining pressure on the dynamic properties of composite specimen with GC pile and CFG pile was studied under a wide range of strains by regression analysis, a simple method for calculating the dynamic elastic modulus and damping ratio is Proposed and an empirical formula considering the mentioned factors above is also presented to provide a elementary reference for anti-seismic design of composite foundations with GC piles and CFG piles.
Preface With the test equipment to improve and enhance, researchers can expand the dynamic properties of a wide range of soil and in-depth research.
Hardin[1~2] and others in a large number of tests, based on the dynamic characteristics of the factors that affect the soil has been studied, and gives estimates of the dynamic elastic modulus and damping ratio of the empirical formula for the experimental study of soil dynamics to excellent results; G.
After a reinforced composite foundation, the overall project is different from the original mechanical properties of soft soil, with other types of artificial foundations are also very different.
(2) Dynamic properties of composite soil sample has been significantly improved, the maximum dynamic modulus ratio of the maximum dynamic modulus of clay increased, while the damping ratio decreases
Preface With the test equipment to improve and enhance, researchers can expand the dynamic properties of a wide range of soil and in-depth research.
Hardin[1~2] and others in a large number of tests, based on the dynamic characteristics of the factors that affect the soil has been studied, and gives estimates of the dynamic elastic modulus and damping ratio of the empirical formula for the experimental study of soil dynamics to excellent results; G.
After a reinforced composite foundation, the overall project is different from the original mechanical properties of soft soil, with other types of artificial foundations are also very different.
(2) Dynamic properties of composite soil sample has been significantly improved, the maximum dynamic modulus ratio of the maximum dynamic modulus of clay increased, while the damping ratio decreases
Online since: July 2014
Authors: Xiao Dong Zhang, Ying Xia Yu, Song Song Xia, Bo Lin He
Geometrical parameters of welded joint affect the stress concentration coefficient seriously.
The stress concentration sensitivity of structural materials is primarily determined by their properties, theoretical stress concentration factor, the size of the objects under investigation, loading conditions [2].
There are a lot of factors influencing fatigue strength of welded structures, but stress concentration is the most important one.
There are many factors which has the effect on stress concentration phenomenon of welded cruciform joints, including weld tangent line angle θ, weld leg size and so on, as shown in Fig. 1.
Stress concentration factors and fatigue behaviour of welded thin walled CHS-SHS T-joints under in-plane bending[J].
The stress concentration sensitivity of structural materials is primarily determined by their properties, theoretical stress concentration factor, the size of the objects under investigation, loading conditions [2].
There are a lot of factors influencing fatigue strength of welded structures, but stress concentration is the most important one.
There are many factors which has the effect on stress concentration phenomenon of welded cruciform joints, including weld tangent line angle θ, weld leg size and so on, as shown in Fig. 1.
Stress concentration factors and fatigue behaviour of welded thin walled CHS-SHS T-joints under in-plane bending[J].
Online since: December 2011
Authors: Yu Hong Wang, Qing Feng Yang, Kai Zhang, Peng Wang
The resonance frequency of the cymbal transducer ranges from 2kHz to 40kHz and its effective electromechanical coupling factor is around 20%.
Finite element analysis has been performed to ascertain how the transducer’s makeup affect the transducer’s performance parameters.
The electromechanical properties and vibration modal of the cymbal transducer of the 10KHz-40KHz resonance frequency were researched [8,9,10].
The cymbal transducers of eight sorts of different structure parameter of 3KHz resonance frequency were researched by ANSYS FEM in this article, finite element model is discussed, strunture parameter influence on resonance frequency is debated, and computing the bandwidth, quality factor, efficient electromechanical coefficeent performance parameters, the cymbal transducer of better comprehensive performance is optimized [11].
The free-field voltage sensitivity curve According to table 1 and table 2, the -3dB bandwidth of the cymbal transducer of the 8mm cavity coping diameter, 20.8mm cavity bottom diameter and 26.8mm piezoelectric ceramic wafer diameter was the broadest and up to 400Hz, the mechanical quality factor and the electrical quality factor of the cymbal transducers of the 8mm cavity coping diameter, 22.4mm cavity bottom diameter and 26. 4mm piezoelectric ceramic wafer diameter, the 9mm cavity coping diameter, 21.6mm cavity bottom diameter and 27.6mm piezoelectric ceramic wafer diameter and the 8mm cavity coping diameter, 20.8mm cavity bottom diameter and 26.8mm piezoelectric ceramic wafer diameter were smaller, thereinto, the mechanical quality factor of the cymbal transducer of the 8mm cavity coping diameter, 20.8mm cavity bottom diameter and 26.8mm piezoelectric ceramic wafer diameter was the smallest and up to 8.75, while the electrical quality factor of the cymbal transducer of the 9mm cavity
Finite element analysis has been performed to ascertain how the transducer’s makeup affect the transducer’s performance parameters.
The electromechanical properties and vibration modal of the cymbal transducer of the 10KHz-40KHz resonance frequency were researched [8,9,10].
The cymbal transducers of eight sorts of different structure parameter of 3KHz resonance frequency were researched by ANSYS FEM in this article, finite element model is discussed, strunture parameter influence on resonance frequency is debated, and computing the bandwidth, quality factor, efficient electromechanical coefficeent performance parameters, the cymbal transducer of better comprehensive performance is optimized [11].
The free-field voltage sensitivity curve According to table 1 and table 2, the -3dB bandwidth of the cymbal transducer of the 8mm cavity coping diameter, 20.8mm cavity bottom diameter and 26.8mm piezoelectric ceramic wafer diameter was the broadest and up to 400Hz, the mechanical quality factor and the electrical quality factor of the cymbal transducers of the 8mm cavity coping diameter, 22.4mm cavity bottom diameter and 26. 4mm piezoelectric ceramic wafer diameter, the 9mm cavity coping diameter, 21.6mm cavity bottom diameter and 27.6mm piezoelectric ceramic wafer diameter and the 8mm cavity coping diameter, 20.8mm cavity bottom diameter and 26.8mm piezoelectric ceramic wafer diameter were smaller, thereinto, the mechanical quality factor of the cymbal transducer of the 8mm cavity coping diameter, 20.8mm cavity bottom diameter and 26.8mm piezoelectric ceramic wafer diameter was the smallest and up to 8.75, while the electrical quality factor of the cymbal transducer of the 9mm cavity
Online since: July 2016
Authors: Jun Ru Yang, Kun Guo, Yu Rong Chi, Xue Cheng Chen, Hai Tao Feng
Junru Yang et al [7,8] studied the change laws of the intensity stress factor of the interface crack in the hard cladding material structure with the mechanical load, temperature load, crack length and the cladding thickness.
The propagation properties of these three interface micro cracks are explored by the molecular dynamics simulated calculations of the models with interface micro cracks.
The relationship between interface crack length and interface bonding energy of the interface model Propagation Property of the Interface Micro Cracks with Different Length To the micro crack parallel with the interface, the further study is about the micro crack length affect on the interface propagation property.
Li, Research on the mechanical properties of the multiple hard alloy coating, Surf. technol. 37 (2008) 16-18
Chen, et al, Research on stress intensity factor of the interface crack in the hard cladding material structure under mechanical impact load, Key Eng.
The propagation properties of these three interface micro cracks are explored by the molecular dynamics simulated calculations of the models with interface micro cracks.
The relationship between interface crack length and interface bonding energy of the interface model Propagation Property of the Interface Micro Cracks with Different Length To the micro crack parallel with the interface, the further study is about the micro crack length affect on the interface propagation property.
Li, Research on the mechanical properties of the multiple hard alloy coating, Surf. technol. 37 (2008) 16-18
Chen, et al, Research on stress intensity factor of the interface crack in the hard cladding material structure under mechanical impact load, Key Eng.
Online since: April 2009
Authors: Peter J. Uggowitzer, Alla S. Sologubenko, Anja C. Hänzi
Grain growth restriction factors of single alloying elements for various alloy
compositions.
The mechanical properties of the as-extruded alloys were evaluated by standard tensile testing at room temperature (details see [19]).
Based on the microstructural characteristics exceptional mechanical properties arose.
As a consequence, the alloys can be repeatedly subjected to various thermo-mechanical treatments with subsequent restoration of the mechanical properties.
Once recrystallisation has taken place, the mechanical properties can be restored due to the constricted grain size and stability of the second phases.
The mechanical properties of the as-extruded alloys were evaluated by standard tensile testing at room temperature (details see [19]).
Based on the microstructural characteristics exceptional mechanical properties arose.
As a consequence, the alloys can be repeatedly subjected to various thermo-mechanical treatments with subsequent restoration of the mechanical properties.
Once recrystallisation has taken place, the mechanical properties can be restored due to the constricted grain size and stability of the second phases.
Online since: August 2014
Authors: Gladys Schnier, James Wood, Alexander Galloway
Secondly, the surface heat treatment effect, arising due to the variation in temperature of materials affecting the cooling rates and constraint levels within the component.
Another aspect that impacts residual stress development is that of material properties of the substrate, heat-affected zone (HAZ) and clad passes.
Thermal residual stresses arise through the weld cladding process hence thermal and mechanical material properties are of particular importance.
Thermal and mechanical properties are inserted into the FE model, experimentally obtained for the representative clad and HAZ materials using specimens harvested from the clad component as shown in Fig. 1.
Table 1: Thermal and mechanical properties of substrate and clad materials at room temperature.
Another aspect that impacts residual stress development is that of material properties of the substrate, heat-affected zone (HAZ) and clad passes.
Thermal residual stresses arise through the weld cladding process hence thermal and mechanical material properties are of particular importance.
Thermal and mechanical properties are inserted into the FE model, experimentally obtained for the representative clad and HAZ materials using specimens harvested from the clad component as shown in Fig. 1.
Table 1: Thermal and mechanical properties of substrate and clad materials at room temperature.