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Online since: June 2015
Authors: K. Palanikumar, K. Velavan
Even though the mica is very brittle it has various properties such as chemical, thermal, electrical, Mechanical and physical properties.
Rajmohan et al. [16] produced Al /Sic/mica composite and investigated its mechanical properties.
Feed rate is the important factor which affects the thrust force in both the composites.
· The aluminium metal matrix composites with multiple reinforcement showing improved mechanical and tribological properties
[8] K Palanikumar, R Karthikeyan, Assessment of Factors Influencing Surface roughness on machining ofAl/SiC Particulate composites [J].
Rajmohan et al. [16] produced Al /Sic/mica composite and investigated its mechanical properties.
Feed rate is the important factor which affects the thrust force in both the composites.
· The aluminium metal matrix composites with multiple reinforcement showing improved mechanical and tribological properties
[8] K Palanikumar, R Karthikeyan, Assessment of Factors Influencing Surface roughness on machining ofAl/SiC Particulate composites [J].
Online since: May 2013
Authors: Jie Bing Wang, Hua Pin Zuo, Zhao Hui Fu, Chun Hua Wu, Min Xu, Lin Li, Yin Zhong Zhao
Thermal radiative properties were measured on a Calorimetric Emissometer at 175K~375K.
Traditionally, active thermal control was realized using heaters, variable conductance heat pipes, mechanical louvers [1], etc.
This paper explored the preparation process of the new La1-xSrxMnO3 materials, ceramic sintering process combined with a solid state reaction method was used to prepare various components of La1-xSrxMnO3 (x = 0, 0.1, 0.15, 0.175, 0.2 and 0.3) at 900°C~1400°C, a detailed analysis was carried out in the scope of the microscopic structure changes and thermal radiative properties.
It could be seen from the figure with different proportions of Sr-doped, the emissivity of the material with the temperature variation on the undoped material only showed insulator characteristics, with different doping proportion, transition occurred from insulator at high temperature to metal properties at low temperatures.
The structural phase transition appeared to cause Mn3+↔ Mn4+ ion conversion two factors combined result of the Mn-O octahedral Jahn-Teller distortion.
Traditionally, active thermal control was realized using heaters, variable conductance heat pipes, mechanical louvers [1], etc.
This paper explored the preparation process of the new La1-xSrxMnO3 materials, ceramic sintering process combined with a solid state reaction method was used to prepare various components of La1-xSrxMnO3 (x = 0, 0.1, 0.15, 0.175, 0.2 and 0.3) at 900°C~1400°C, a detailed analysis was carried out in the scope of the microscopic structure changes and thermal radiative properties.
It could be seen from the figure with different proportions of Sr-doped, the emissivity of the material with the temperature variation on the undoped material only showed insulator characteristics, with different doping proportion, transition occurred from insulator at high temperature to metal properties at low temperatures.
The structural phase transition appeared to cause Mn3+↔ Mn4+ ion conversion two factors combined result of the Mn-O octahedral Jahn-Teller distortion.
Online since: June 2014
Authors: Petar Ratchev, Peter Jessner
Recrystallization control over the whole process route is strictly needed in order to achieve the required texture and properties.
Two of the most important properties of the automotive 6xxx alloys, formability and roping behavior, are both strongly dependent on texture.
Different particle types have different impact on the recrystallization process and resulting texture and properties.
In it, the surface fractions Fs (we consider them representative to the volume fractions Fv), their effective diameter D (approximating the particles with a round shape) and the dispersion factors, Fs/r, are presented for both cases, WQ and SC.
In fact, a combined dispersion (from both Mn-dispersoids and Mg-Si particles) might be introduced for SC samples, but this is extremely difficult, because many factors should be taken into account, as the heterogeneous nucleation, the particles shape difference etc.
Two of the most important properties of the automotive 6xxx alloys, formability and roping behavior, are both strongly dependent on texture.
Different particle types have different impact on the recrystallization process and resulting texture and properties.
In it, the surface fractions Fs (we consider them representative to the volume fractions Fv), their effective diameter D (approximating the particles with a round shape) and the dispersion factors, Fs/r, are presented for both cases, WQ and SC.
In fact, a combined dispersion (from both Mn-dispersoids and Mg-Si particles) might be introduced for SC samples, but this is extremely difficult, because many factors should be taken into account, as the heterogeneous nucleation, the particles shape difference etc.
Online since: December 2012
Authors: Liang Huang, Lin Cui, Shi Hai Zhao
Wang et al. [7] studied the effect of mechanical stirring speed on the microstructure and properties of the coatings.
Properties of composite coatings Ni-P-WC nanocomosite coatings.
Nano-Al2O3 particles could enhance the mechanical properties of the Ni-P alloy coating obviously.
However, the concentration of nano-SiC particles is not the more, the properties are the better.
Thus hardness variations, corrosion or erosion–corrosion parameters differential and other factors must not be related to the structure of electroless asdeposited and composite coatings.
Properties of composite coatings Ni-P-WC nanocomosite coatings.
Nano-Al2O3 particles could enhance the mechanical properties of the Ni-P alloy coating obviously.
However, the concentration of nano-SiC particles is not the more, the properties are the better.
Thus hardness variations, corrosion or erosion–corrosion parameters differential and other factors must not be related to the structure of electroless asdeposited and composite coatings.
Online since: September 2013
Authors: Zi Min Jin, Yu Xiu Yan, Jian Wei Tao, Ling He, Yan Na Feng
Results show that there is a close correlation between compression properties T2, T100, drape performance F0, shear stiffness G and stereotyped pleat recovery Angle.
The factors of influencing seamless sizing effect include the ironing process parameters, fabric performance, organizational structure, weaving processing parameters and many others.
Test project Mechanical properties Mechanical properties mainly include the following indicators: compression thickness T2, T100; bending length C; extensibility E5; bending rigidity B and shear stiffness G and Static drape coefficient F0.
Extensibility is too large, the fabric is easy to stretch, which affects the clothing size stability [4].
Conclusions (1)There is a strong direct correlation between compressive properties T2, T100, draping property F0, shear stiffness G and Stereotyped pleat recovery angle in 7 performances of fabrics.
The factors of influencing seamless sizing effect include the ironing process parameters, fabric performance, organizational structure, weaving processing parameters and many others.
Test project Mechanical properties Mechanical properties mainly include the following indicators: compression thickness T2, T100; bending length C; extensibility E5; bending rigidity B and shear stiffness G and Static drape coefficient F0.
Extensibility is too large, the fabric is easy to stretch, which affects the clothing size stability [4].
Conclusions (1)There is a strong direct correlation between compressive properties T2, T100, draping property F0, shear stiffness G and Stereotyped pleat recovery angle in 7 performances of fabrics.
Online since: August 2014
Authors: Li Zhi Gu, Peng Li, Tie Ming Xiang
The objective function was taken as the sum of the mass expression of each component of the frame with a series of punishing factors.
For a certain processing object, the factors affecting the service life of bead wire includes not only the bead wire structure, morphology and material properties, but also, to a great extent, on conditions of use, especially the cutting force, tension, wear, cyclic stress state, cooling condition, etc.
One of the most significant impact factors is the cyclic stress state and degree of wear and tear.
Enveloping angle and rope wear are two the important factors that complement each other and restrict each other.
Peng: Journal of Mechanical Engineering, Vol. 49 NO.3, p. 153-162.
For a certain processing object, the factors affecting the service life of bead wire includes not only the bead wire structure, morphology and material properties, but also, to a great extent, on conditions of use, especially the cutting force, tension, wear, cyclic stress state, cooling condition, etc.
One of the most significant impact factors is the cyclic stress state and degree of wear and tear.
Enveloping angle and rope wear are two the important factors that complement each other and restrict each other.
Peng: Journal of Mechanical Engineering, Vol. 49 NO.3, p. 153-162.
Online since: August 2011
Authors: Sankara J. Subramanian, Vijay K. R. Penmetcha
., 23, Airport Road II Floor, Leela Galleria, Bengaluru 560008 India
ashankar_sj@iitm.ac.in, bvijay.vilto@gmail.com
Keywords: Lap-Shear, Mechanical Properties, Digital Image Correlation (DIC), Sn-Cu Solder, Pb-Free Solder, Electronic Packaging
Abstract.
The lap-shear test is frequently used in the microelectronics industry to obtain mechanical properties of solder joints.
Introduction Solders are widely used in the micro-electronics industry [3] to provide interconnections between materials that have very different mechanical properties [4] such as elastic modulus and coefficient of thermal expansion (CTE).
While their low melting points are an advantage with respect to processing and their low yield stresses and large ductility protect the adherends from thermo-mechanically induced failure, these factors contribute to substantial strains in the solder joints themselves.
Creep properties of composite solders reinforced with nano- and micro-sized particles.
The lap-shear test is frequently used in the microelectronics industry to obtain mechanical properties of solder joints.
Introduction Solders are widely used in the micro-electronics industry [3] to provide interconnections between materials that have very different mechanical properties [4] such as elastic modulus and coefficient of thermal expansion (CTE).
While their low melting points are an advantage with respect to processing and their low yield stresses and large ductility protect the adherends from thermo-mechanically induced failure, these factors contribute to substantial strains in the solder joints themselves.
Creep properties of composite solders reinforced with nano- and micro-sized particles.
Modeling of the Cyclic Behavior of Shape Memory Alloys during Localized Unstable Mechanical Response
Online since: June 2008
Authors: Daan M. Maijer, Bijan Azadi, Nimal Rajapakse
Experiments have shown that the localization of transformation in NiTi shape memory
alloys (SMAs) is an important factor in determining their mechanical response during cyclic
loading.
These properties have led to the increasing use of SMAs in many engineering applications as sensors, actuators, and damping constituents.
Its mathematical expression is written as follows: ∫ += γγ λ λλ d)dH()( bTa (1) where H( ) is the Heaviside step function, γ is the martensitic fraction, and λa and λb are the material properties.
The thermo-mechanical properties of the wire obtained from previous experiments and vendor literature are summarized in Table 2.
Thermo-mechanical properties of the NiTi h2= 1200 W/m2 K T∞,2= TT 4 mm LT=52 mm 4mm h1= 4 W/m2 K T∞,1= 25 ○C δ (b x NiTi wire ∅0.765 mm LG=60 mm (divided to 120 elements) h1= 4 W/m2 K T∞,1= 25 ○C TGrip= 46 ○C TGrip= 46 ○C Figure 1.
These properties have led to the increasing use of SMAs in many engineering applications as sensors, actuators, and damping constituents.
Its mathematical expression is written as follows: ∫ += γγ λ λλ d)dH()( bTa (1) where H( ) is the Heaviside step function, γ is the martensitic fraction, and λa and λb are the material properties.
The thermo-mechanical properties of the wire obtained from previous experiments and vendor literature are summarized in Table 2.
Thermo-mechanical properties of the NiTi h2= 1200 W/m2 K T∞,2= TT 4 mm LT=52 mm 4mm h1= 4 W/m2 K T∞,1= 25 ○C δ (b x NiTi wire ∅0.765 mm LG=60 mm (divided to 120 elements) h1= 4 W/m2 K T∞,1= 25 ○C TGrip= 46 ○C TGrip= 46 ○C Figure 1.
Online since: October 2011
Authors: Peng Wang, Wei Jun Yang
Introduction
The tensile strength is one of basic mechanical properties of concrete.
Influence factors of splitting tensile strength Then tensile strength of concrete depends on the strength of aggregate and hardening cement slurry, especially on the bonding strength of t aggregate and cement.
So compare to other test, the conversion of splitting tensile strength and cubic compressive strength is different from previous research due to the handling Influence factors differently, but in general, the mathematical model and the trend is the same.
(3) It is thought that the reason for the different values B this test and other test in splitting tensile strength is the choice of influence factors different, when considering the comprehensive factor, such the type of ceramist, maintenance mode, the width of block.
Conclusion Some conclusion can be maken below by the experimental research of splitting tensile strength and the great influence factor of the bond properties 1 The splitting tensile strength of ceramisite concrete is higher than other light weight aggregate concrete for then mix of ceramist and Molding maintenance 2 It can be used the traditional mathematics model to analysis the relationship splitting tensile strength and the cubic compressive strength of Ceramist concrete.
Influence factors of splitting tensile strength Then tensile strength of concrete depends on the strength of aggregate and hardening cement slurry, especially on the bonding strength of t aggregate and cement.
So compare to other test, the conversion of splitting tensile strength and cubic compressive strength is different from previous research due to the handling Influence factors differently, but in general, the mathematical model and the trend is the same.
(3) It is thought that the reason for the different values B this test and other test in splitting tensile strength is the choice of influence factors different, when considering the comprehensive factor, such the type of ceramist, maintenance mode, the width of block.
Conclusion Some conclusion can be maken below by the experimental research of splitting tensile strength and the great influence factor of the bond properties 1 The splitting tensile strength of ceramisite concrete is higher than other light weight aggregate concrete for then mix of ceramist and Molding maintenance 2 It can be used the traditional mathematics model to analysis the relationship splitting tensile strength and the cubic compressive strength of Ceramist concrete.
Online since: October 2012
Authors: Wei Yan Shang, Chun Lin Liu, Wen Lin Min, Liu Yin Xiao, Cun Yue Cheng
Thus, the quality of precision stamping can be measured according to the usage condition and requirements, and then we can take appropriate measures to improve the quality of stamping according to the factors affecting the quality.
Affect of Gas to Quality of Section.
The deviation may be positive or negative, the determination factor is the blanking clearance.
Furthermore, The material properties, thickness, shape of workpiece will also affect on the dimensional accuracy.
Fig. 2 Blanking clearance size impact on the dimensional accuracy Fig. 3 Factors affect on dimensional accuracy Conclusion According to the above analysis, we know that the blanking clearance size between die and punch affects the quality of workpiece .And edge state, structure , material performance and manufacture accuracy of die always affect the quality of blanking.To get an optimal blanking process, we should study more about the affection of blanking clearance size to blanking process.
Affect of Gas to Quality of Section.
The deviation may be positive or negative, the determination factor is the blanking clearance.
Furthermore, The material properties, thickness, shape of workpiece will also affect on the dimensional accuracy.
Fig. 2 Blanking clearance size impact on the dimensional accuracy Fig. 3 Factors affect on dimensional accuracy Conclusion According to the above analysis, we know that the blanking clearance size between die and punch affects the quality of workpiece .And edge state, structure , material performance and manufacture accuracy of die always affect the quality of blanking.To get an optimal blanking process, we should study more about the affection of blanking clearance size to blanking process.