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Online since: June 2011
Authors: Şefika Kasman, İ.E. Saklakoğlu
The process parameters are combined with wear process factors and the responses of wear tests were evaluated.
The results showed that both friction coefficient and wear rate are affected by process parameters.
The properties of the hardened layer are controlled by the energy input, which depends on the process parameters and interaction time [5].
The percentage overlap value affects the surface quality which can be calculated from Eq. 1
The percentage overlap affects the surface texture.
The results showed that both friction coefficient and wear rate are affected by process parameters.
The properties of the hardened layer are controlled by the energy input, which depends on the process parameters and interaction time [5].
The percentage overlap value affects the surface quality which can be calculated from Eq. 1
The percentage overlap affects the surface texture.
Online since: August 2019
Authors: Luciano Ombres, Maria Antonietta Aiello, Alessio Cascardi, Salvatore Verre
Parametric analysis allowed to evidence the influence of the mechanical and geometrical parameters on the structural performances of the FRCM-system in confining column.
In fact, since the fabric’s role is reasonably similar to the fiber sheet in FRPs (elastic up to failure) the inorganic matrix demonstrated to be significantly damaged (even if the compressive strength of the FRCM-column was not reached) and so negatively affecting the confining pressure, [12].
The slope of the second line, following the cracking of the matrix, was strongly affected by the fabric.
On the other hand, FRCM23-confinement affected the inner core by increasing its compressive strength of 80%.
FRCM-confined masonry columns: experimental investigation on the effect of the inorganic matrix properties.
In fact, since the fabric’s role is reasonably similar to the fiber sheet in FRPs (elastic up to failure) the inorganic matrix demonstrated to be significantly damaged (even if the compressive strength of the FRCM-column was not reached) and so negatively affecting the confining pressure, [12].
The slope of the second line, following the cracking of the matrix, was strongly affected by the fabric.
On the other hand, FRCM23-confinement affected the inner core by increasing its compressive strength of 80%.
FRCM-confined masonry columns: experimental investigation on the effect of the inorganic matrix properties.
Online since: November 2017
Authors: Mohammad Reza Shabgard, Behnam Khosrozade, Hossein Faraji, Hadi Eivazi-Bagheri, Keivan Amini
Influences of these different dielectrics properties on machining speed, tool wear, surface cracks and roughness were compared.
During the past decades, a wide range of studies has been done on Ti-Al alloys because of their important properties such as fuel economy and good thrust to weight ratio.
Table 1 illustrates the mechanical properties of γ-TiAl intermetallic compound.
Mechanical properties of γ-TiAl [11].
Stoyanov; “An evaluative approach to correlate machinability, microstructures, and material properties of gamma titanium aluminides”; CIRP Annals - Manufacturing Technology, Vol. 63, No.1, (2014), PP. 57-60
During the past decades, a wide range of studies has been done on Ti-Al alloys because of their important properties such as fuel economy and good thrust to weight ratio.
Table 1 illustrates the mechanical properties of γ-TiAl intermetallic compound.
Mechanical properties of γ-TiAl [11].
Stoyanov; “An evaluative approach to correlate machinability, microstructures, and material properties of gamma titanium aluminides”; CIRP Annals - Manufacturing Technology, Vol. 63, No.1, (2014), PP. 57-60
Online since: December 2012
Authors: Manoj Modi, G. Agarwal
Agarwal2, b
1Research Scholar, Mechanical Engineering Department, Malaviya National Institute of Technology, Jaipur, Rajasthan, India.
2Mechanical Engineering Department, Malaviya National Institute of Technology, Jaipur, Rajasthan, India.
The various input process parameters in this work are wheel speed (RPM), duty factor, current (ampere) and pulse on-time (µs).
Introduction Titanium and its alloys were extensively used in many applications (especially in aerospace, medical, marine and surgical implants etc.) because these have excellent properties such as exceptional corrosion resistance, high strength to weight ratio and high temperature strength.
Table 1: Various input parameters, their levels & Formula for calculate the MRR Symbol Control Factor Level 1 Level 2 Level 3 Formula for calculate the MRR I Current (Ampere) 1 5 9 Ton Pulse-on-time () 100 150 200 S Speed (RPM) 350 550 750 DF Duty Factor 0.61 0.69 0.77 Where, & is initial & final weight of workpiece in gram (before & after machining respectively); is machining time in minutes.
It is observed through ANOVA analysis that the contribution of various factors are (Ton= 58.8 %), (I = 16.28 %), (S = 10 %) and (DF = 14.93 %) for the responses under the multiple criterion optimization (maximization of MRR and minimization of Ra) in EDDSG of Ti-6Al-4V.
The various input process parameters in this work are wheel speed (RPM), duty factor, current (ampere) and pulse on-time (µs).
Introduction Titanium and its alloys were extensively used in many applications (especially in aerospace, medical, marine and surgical implants etc.) because these have excellent properties such as exceptional corrosion resistance, high strength to weight ratio and high temperature strength.
Table 1: Various input parameters, their levels & Formula for calculate the MRR Symbol Control Factor Level 1 Level 2 Level 3 Formula for calculate the MRR I Current (Ampere) 1 5 9 Ton Pulse-on-time () 100 150 200 S Speed (RPM) 350 550 750 DF Duty Factor 0.61 0.69 0.77 Where, & is initial & final weight of workpiece in gram (before & after machining respectively); is machining time in minutes.
It is observed through ANOVA analysis that the contribution of various factors are (Ton= 58.8 %), (I = 16.28 %), (S = 10 %) and (DF = 14.93 %) for the responses under the multiple criterion optimization (maximization of MRR and minimization of Ra) in EDDSG of Ti-6Al-4V.
Online since: December 2014
Authors: Xiao Ruan Song, Dong Fu Zhao, Mei Liu, Dan Wang
Then after the static test of simply supported beam, the phenomena of simply supported beams before and after fire were compared in order to determine the damage degree of mechanical property.
Due to the high temperature environment in the fire, a variety of mechanical performances of steel and concrete in reinforced concrete structures continuously decrease with the increase of temperature.
One of the main reasons for the deterioration of the bearing capacity and limit of fire resistance of structure is the degradation of material properties [2-3].The fire will lead to unrecoverable damage of reinforced concrete structure and affect the working performance.
Specimen design According to the fire damage beam mentioned by an organization with the inspection report, and taking the influencing factors of the experimental conditions into account, the test specimen beams were made by the appropriately scaled.
The reduction factor: of steel elastic modulus was defined as the ratio of elastic modulus and the elastic modulus at room temperature in the condition of steel experiencing the temperature t and cooling.
Due to the high temperature environment in the fire, a variety of mechanical performances of steel and concrete in reinforced concrete structures continuously decrease with the increase of temperature.
One of the main reasons for the deterioration of the bearing capacity and limit of fire resistance of structure is the degradation of material properties [2-3].The fire will lead to unrecoverable damage of reinforced concrete structure and affect the working performance.
Specimen design According to the fire damage beam mentioned by an organization with the inspection report, and taking the influencing factors of the experimental conditions into account, the test specimen beams were made by the appropriately scaled.
The reduction factor: of steel elastic modulus was defined as the ratio of elastic modulus and the elastic modulus at room temperature in the condition of steel experiencing the temperature t and cooling.
Online since: September 2014
Authors: Wen Ming Yu
Construction of analytic hierarchical model of the optimal path
In this issue of the optimal path selection, the uppermost layer of the model is to target the optimal path, that is, the hierarchical model analysis goal is the optimal path; rule layer are a few of the major factors affecting the quality of road; final layer index layer the second layer is a specific indicator of the impact the big factors.
Many factors affect the optimal path, this article will these factors into three categories: (1) introduces the total length of road congestion distance; (2) road safety; (3) driver subjective factors [5].
Fig. 4 The analytic hierarchy mode Comprehensive road length is determined by the actual length of the road and road congestion distance factor two indicators, road safety, road width, road gradient, turning radius and sections of the pass, as the case five indicators determined by the quality of the road sections; due to the driver's subjective factors related to human subjective experience, more complex, as measured here on the road with only a driver familiar with the situation one indicator.
Which is an important feature in the form of pairwise ratio shows the extent of the importance of the two factors relative degree of importance level.
According to their degree of importance rating, such as certain criteria is under pairwise comparison of factors.
Many factors affect the optimal path, this article will these factors into three categories: (1) introduces the total length of road congestion distance; (2) road safety; (3) driver subjective factors [5].
Fig. 4 The analytic hierarchy mode Comprehensive road length is determined by the actual length of the road and road congestion distance factor two indicators, road safety, road width, road gradient, turning radius and sections of the pass, as the case five indicators determined by the quality of the road sections; due to the driver's subjective factors related to human subjective experience, more complex, as measured here on the road with only a driver familiar with the situation one indicator.
Which is an important feature in the form of pairwise ratio shows the extent of the importance of the two factors relative degree of importance level.
According to their degree of importance rating, such as certain criteria is under pairwise comparison of factors.
Online since: April 2019
Authors: Nattakarn Hongsriphan, Supakorn Samangain, Yuttanawee Siriteeraphan, Nattakarn Yangcheepyuenyoodee
Its mechanical properties, such as tensile strength and elongation at break, are comparable with those of polypropylene or high-density polyethylene.
It was found that blending rPET into PBS yielded stronger mechanical properties compared to pure PBS.
Thermal properties of the PBS/rPET blends by DSC.
This indicated that there were other factors rather than only the PET phases that affected in the heterogeneous nucleation of PBS matrix.
Mechanical properties of pure PBS and PBS/rPET blends.
It was found that blending rPET into PBS yielded stronger mechanical properties compared to pure PBS.
Thermal properties of the PBS/rPET blends by DSC.
This indicated that there were other factors rather than only the PET phases that affected in the heterogeneous nucleation of PBS matrix.
Mechanical properties of pure PBS and PBS/rPET blends.
Online since: March 2017
Authors: Arun Kumar Solarajan, Vignesh Murugadoss, Subramania Angaiah
However, several intrinsic factors such as poor dimensional stability, reduction in electrical conductivity with time, interfacial instability, low porosity and poor thermal stability lead to high cell resistance, internal short circuits which are deleterious in terms of poor performance and reliability, especially affect the safety of the device[2].
The porosity is an important factor in determining the ion transport properties of the electrolyte.
Thermal shrinkage of the separator is another important concern affecting not only the Li-ion capacitor performance but also its safety.
Kim, Electrochemical and Spectroscopic Properties of Electrospun PAN-Based Fibrous Polymer Electrolytes, J.
Wang, PVDF-HFP composite polymer electrolyte with excellent electrochemical properties for Li-ion batteries, J.
The porosity is an important factor in determining the ion transport properties of the electrolyte.
Thermal shrinkage of the separator is another important concern affecting not only the Li-ion capacitor performance but also its safety.
Kim, Electrochemical and Spectroscopic Properties of Electrospun PAN-Based Fibrous Polymer Electrolytes, J.
Wang, PVDF-HFP composite polymer electrolyte with excellent electrochemical properties for Li-ion batteries, J.
Online since: January 2012
Authors: Ping Fang, Xi Xi He
Introduction
As crack resistance, shear strength, torsional strength, shrinkage stress and bond properties of concrete members are relevant to tensile strength, tensile strength becomes a basic strength index of concrete and the basis of its mechanical properties which also has vital theoretical significance both for establishing strength criterion of concrete under multi-axial stress states and for analyzing its brittleness.
Eccentricity and stress concentration are the main affect factors for uniform uniaxial tensile strength test of concrete [1].
According to ‘Standard for method of mixture properties on ordinary concrete’ (GB/T 50080-2002) [3] and ‘Standard for method of mechanical properties on ordinary concrete’ (GB/T 50080-2002) [4] , concrete slump was tested.
[2] Neville, A.M. (1973) “Properties of Concrete”, 2nd ed.Pitman Publishing Ltd
“Standard for method of mechanical properties on ordinary concrete”, GB/T 50081-2002\, Beijing: Chinese Architecture Industry Press, April 2003
Eccentricity and stress concentration are the main affect factors for uniform uniaxial tensile strength test of concrete [1].
According to ‘Standard for method of mixture properties on ordinary concrete’ (GB/T 50080-2002) [3] and ‘Standard for method of mechanical properties on ordinary concrete’ (GB/T 50080-2002) [4] , concrete slump was tested.
[2] Neville, A.M. (1973) “Properties of Concrete”, 2nd ed.Pitman Publishing Ltd
“Standard for method of mechanical properties on ordinary concrete”, GB/T 50081-2002\, Beijing: Chinese Architecture Industry Press, April 2003
Online since: December 2013
Authors: Chuan Fu Ma, Jun Man Kan, Li Quan Guo, Ming Wu
Extraction of the polysaccharides is the first and a necessary step in the effective exploitation of their structure and functional properties [5].
Among them, UAE method has the advantage of accelerating the extraction process, causing less damage to the structural and molecular properties of plant materials [7].
Results and discussion Effects of various factors on the extraction yield of RAP.
Effects of various factors on the extraction yield of RAP Optimum conditions for RAP extraction.
As shown in Table 1, the degree of affecting the extraction yield of RAP was A>B>D>C.
Among them, UAE method has the advantage of accelerating the extraction process, causing less damage to the structural and molecular properties of plant materials [7].
Results and discussion Effects of various factors on the extraction yield of RAP.
Effects of various factors on the extraction yield of RAP Optimum conditions for RAP extraction.
As shown in Table 1, the degree of affecting the extraction yield of RAP was A>B>D>C.