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Online since: December 2011
Authors: Hai Ou Jin, A.K. Gupta
Roping has only marginal effect on the mechanical properties, but it is highly rejectionable for cosmetic reasons.
The specific texture components in AA6111 T4 are the cube and Goss, while the P* is usually randomly distributed and hence does not affect the roping behavior.
It is clear that the initial texture and its spatial distribution are the predominant factors for the development of roping, while the texture evolution, strain rate sensitivity, work hardening, crystal elasticity, and inhomogeneous deformation within individual grains have a negligible effect [12].
The roping behavior is not affected when the roping free surface layer is very thin, but as the surface layer is thicker and thicker, the roping becomes less obvious.
The specific texture components in AA6111 T4 are the cube and Goss, while the P* is usually randomly distributed and hence does not affect the roping behavior.
It is clear that the initial texture and its spatial distribution are the predominant factors for the development of roping, while the texture evolution, strain rate sensitivity, work hardening, crystal elasticity, and inhomogeneous deformation within individual grains have a negligible effect [12].
The roping behavior is not affected when the roping free surface layer is very thin, but as the surface layer is thicker and thicker, the roping becomes less obvious.
Online since: December 2014
Authors: Guo Hui Jin, Huai Zhu Wang
Doors and windows are not only the key tools of adjusting the comfort degree of indoor environment, is also the important factors that affect building energy efficiency.
Monolayer roof system technology.Monolayer roof system is the roofing system that uses monolayer TPO, PVC, EPDM waterproofing materials, and fixes waterproof coiled material with mechanical method, usually is the unifinication of waterproof and thermal insulation.
The ground is part of the building palisade structure, Its thermal performance directly affect the indoor thermal environment.
Material properties, thermal calculation and simulation studies of energy-saving windows [D].
Monolayer roof system technology.Monolayer roof system is the roofing system that uses monolayer TPO, PVC, EPDM waterproofing materials, and fixes waterproof coiled material with mechanical method, usually is the unifinication of waterproof and thermal insulation.
The ground is part of the building palisade structure, Its thermal performance directly affect the indoor thermal environment.
Material properties, thermal calculation and simulation studies of energy-saving windows [D].
Online since: December 2011
Authors: Shang Long Xu, Kuang Fang
Microfludic and Heat transfer Performance of Multilayer Fractal-like Microchannel Network
Kuang Fanga, Shanglong Xub
Department of Mechanical Engineering, University of electronic science and technology of China
ak.fang.z@gmail.com, bxslbill@yahoo.com.cn
Keywords: microchannel, fractal-like, multilayer
Abstract.
Another disadvantage of microchannel heat sinks is the uneven temperature distribution along the wall of the heat sink, which can affect the performance and lifetime of chips.
The fractal-like microchannel nets in this paper (Fig. 1a) can be characterized by the hydraulic diameter of each branch, dk, length of each branch, Lk. k which indicates the level of each branch is indexed from 0 to 3.These factors are governed by the following scaling laws found in [4,5]: (1) (2) For the bifurcating channel configuration has n=2, and according to Eqs. (1) and (2), the diameter ratio, β, and the length ratio, γ, are 0.7937 and 0.7071.
The computations were performed using water with temperature-dependent properties as the working fluid and the inlet temperature of 293K.
The temperature gradient could affect the chip’s performance.
Another disadvantage of microchannel heat sinks is the uneven temperature distribution along the wall of the heat sink, which can affect the performance and lifetime of chips.
The fractal-like microchannel nets in this paper (Fig. 1a) can be characterized by the hydraulic diameter of each branch, dk, length of each branch, Lk. k which indicates the level of each branch is indexed from 0 to 3.These factors are governed by the following scaling laws found in [4,5]: (1) (2) For the bifurcating channel configuration has n=2, and according to Eqs. (1) and (2), the diameter ratio, β, and the length ratio, γ, are 0.7937 and 0.7071.
The computations were performed using water with temperature-dependent properties as the working fluid and the inlet temperature of 293K.
The temperature gradient could affect the chip’s performance.
Online since: March 2013
Authors: Bin Deng, Ning Wen, Guang Shi, Long Quan Shao, Yi Han Liu, Rong Jian Lu, Yuan Fu Yi, Bin Gu, Juan Xu, Li Min Liang
So, whether the translucency of ceramic core material match to natural tooth is an essential factor of whole aesthetics of prosthesis and a critical consideration in the selection of materials.
Single factor variance analysis and Turkey’ multiple examinations was conducted with SPSS 13.0 software to appraise whether there was any statistical difference of translucency among core materials,a=0.01.
With the development of material science, modern all-ceramic materials have obviously improved its mechanical strength.
There are different particle size, crystal and refraction index, the latter two of which affect the translucency particularly obviously, low crystal and refraction index resulting in little scattering.
Bins: The chemical and physical properties of dental porcelain.
Single factor variance analysis and Turkey’ multiple examinations was conducted with SPSS 13.0 software to appraise whether there was any statistical difference of translucency among core materials,a=0.01.
With the development of material science, modern all-ceramic materials have obviously improved its mechanical strength.
There are different particle size, crystal and refraction index, the latter two of which affect the translucency particularly obviously, low crystal and refraction index resulting in little scattering.
Bins: The chemical and physical properties of dental porcelain.
Online since: December 2013
Authors: Hui Fang Tian, Li Kun Shang, Zhou Wu, Jing Jing Wang
This environment will cause crop physiological disorders, affect the root absorption and utilization of nutrients and increase and spread a variety of plant diseases [1,2].
(2) Through the way of experimental test combining with simulation, the design data of the greenhouse EAHE should be systematically summarized for different climatic regions, different types of soil properties and so on
(3) The thermal conductivity of the pipe and backfill materials directly affects the efficiency of the EAHE.
(4) Operating start-stop ratios of the EAHE and recovery situation of the soil temperature filed are another two important factors of the greenhouse EAHE.
Project Report for M S degree, MIT, Mechanical Engineering,1982
(2) Through the way of experimental test combining with simulation, the design data of the greenhouse EAHE should be systematically summarized for different climatic regions, different types of soil properties and so on
(3) The thermal conductivity of the pipe and backfill materials directly affects the efficiency of the EAHE.
(4) Operating start-stop ratios of the EAHE and recovery situation of the soil temperature filed are another two important factors of the greenhouse EAHE.
Project Report for M S degree, MIT, Mechanical Engineering,1982
Online since: July 2017
Authors: Ingrid Boem, Natalino Gattesco
The mechanical properties of the mortars of the coating were determined by means of compression tests and indirect tensile tests performed on cylindrical samples.
The cracks affected the whole masonry thickness; the residual load was related to friction between elements across the cracks and the compressive strength of the masonry struts.
This indicates that, maintaining approximately constant both the factor ft,c*tc and Gc*tc, the same value of b for the evaluation of the reinforced masonry peak load can be assumed.
Moreover, the simple summation of P(U) and Pc is not always on the safe side for mortars with higher values of these strength and stiffness factors.
Moreover, a similar behavior was noted from samples enhanced with GFRP and CFRP, as expected, due to the comparable mechanical characteristics of the meshes (Table 2, Table 3).
The cracks affected the whole masonry thickness; the residual load was related to friction between elements across the cracks and the compressive strength of the masonry struts.
This indicates that, maintaining approximately constant both the factor ft,c*tc and Gc*tc, the same value of b for the evaluation of the reinforced masonry peak load can be assumed.
Moreover, the simple summation of P(U) and Pc is not always on the safe side for mortars with higher values of these strength and stiffness factors.
Moreover, a similar behavior was noted from samples enhanced with GFRP and CFRP, as expected, due to the comparable mechanical characteristics of the meshes (Table 2, Table 3).
Online since: December 2009
Authors: Marc Anglada, Gemma Fargas, Antonio Mateo
For those applications where high strength is
required, two main methods can be used to increase their mechanical resistance: one is age
hardening; the other is via the transformation of austenite to martensite [1,2].
Changes in tensile properties occurring as a result of compositional changes had been studied by different authors, explained at macroscopic [7-11] and microscopic [3,12-14] levels.
Tensile properties were determined, resulting in a yield stress of 724 MPa and a ultimate strength of 881 MPa.
At R= 0, fatigue limits are not affected by the martensite induced by torsion if the surface finish is kept constant.
Honeycombe in Steels Microstructure and Properties, Ed. by Edwars Arnold Ltd., p. 230, London (1981)
Changes in tensile properties occurring as a result of compositional changes had been studied by different authors, explained at macroscopic [7-11] and microscopic [3,12-14] levels.
Tensile properties were determined, resulting in a yield stress of 724 MPa and a ultimate strength of 881 MPa.
At R= 0, fatigue limits are not affected by the martensite induced by torsion if the surface finish is kept constant.
Honeycombe in Steels Microstructure and Properties, Ed. by Edwars Arnold Ltd., p. 230, London (1981)
Online since: November 2011
Authors: Andrzej Ambrozik
The form of the indicator diagram depends mainly on: the pattern and the quality of the fuel spray in injection, the amount and aerodynamic properties of the air supplied to the cylinder, etc.
A correct pattern of combustion process affects the quality of the fuel chemical energy conversion into mechanical energy.
The conversion affects fuel consumption. exhaust gas harmful components emissions, and the engine noise level.
The properties of the fuels used in investigations are presented in Table 2.
Wydawnictwo Politechniki Świętokrzyskiej, Kielce 2010 [2] Ambrozik A., Ambrozik T., Łagowski P.: Impact of AD3.152 UR Engine Loading on Heat Release Characteristics in the Combustion Process (Wpływ obciążenia silnika AD3.152 UR na charakterystyki wydzielania ciepła podczas procesu spalania), Susiec 2008 Conference [3] Ambrozik A., Kurczyński D., Łagowski P.: The heat emission factor during the process of combustion in an AD3.152 engine supplied with various fuels.
A correct pattern of combustion process affects the quality of the fuel chemical energy conversion into mechanical energy.
The conversion affects fuel consumption. exhaust gas harmful components emissions, and the engine noise level.
The properties of the fuels used in investigations are presented in Table 2.
Wydawnictwo Politechniki Świętokrzyskiej, Kielce 2010 [2] Ambrozik A., Ambrozik T., Łagowski P.: Impact of AD3.152 UR Engine Loading on Heat Release Characteristics in the Combustion Process (Wpływ obciążenia silnika AD3.152 UR na charakterystyki wydzielania ciepła podczas procesu spalania), Susiec 2008 Conference [3] Ambrozik A., Kurczyński D., Łagowski P.: The heat emission factor during the process of combustion in an AD3.152 engine supplied with various fuels.
Online since: March 2010
Authors: Sen Li, Kuan Wang, Chun Lian Song, Jiang Cheng, Zhuo Ru Yang
Introduction
Inorganic nanoparticle-polymer composite microspheres with diameters of 1-10 um have
received some interest in electronics, cosmetic, and pharmaceutical industries as well as in the
purification of macromolecules, owing to their mechanical and functional properties [1].
On the basis of these porous materials, attaching nano-sized inorganic particles to the porous materials is expected to generate a novel composite material with unique properties [10-11].
The phase (110,101, 111) was detected for all samples containing TiO2 nanoparticles, irrespective of their concentrations in the composite microspheres, meaning that once the TiO2 nanoparticles were deposited on the surface of porous polymer microspheres, the surface area and surface functionality would not change the phase characteristics of TiO2 nanoparticles. 0 10 20 30 40 50 60 0 1 2 3 4 MAH content(mmol/g) [MAH] (wt-% ) 0 1 0 20 30 40 50 6 0 7 0 0 5 0 10 0 15 0 20 0 25 0 30 0 a b Ti 2 O(111) Ti2 O(101) Ti2 O(110) 2θ de g re e -b T i2O /P (S t-D V B )-M A H -a P (S t-D V B )-M A H Table.1 Characteristics of non-porous and porous polymer particles, and their corresponding TiO2-coated particles Symbol MAH Content Wt-% Particle size b) Porous properties Remarks DN PSDC) um Dpmax d) Vpe) Sf) nm mL/g m 2/g S1 0 6.16 1.01 - - - Non-porous
It can be inferred from these results that the surface area of the substrate particles was an important factor affecting the adsorption of TiO2 particles.
On the basis of these porous materials, attaching nano-sized inorganic particles to the porous materials is expected to generate a novel composite material with unique properties [10-11].
The phase (110,101, 111) was detected for all samples containing TiO2 nanoparticles, irrespective of their concentrations in the composite microspheres, meaning that once the TiO2 nanoparticles were deposited on the surface of porous polymer microspheres, the surface area and surface functionality would not change the phase characteristics of TiO2 nanoparticles. 0 10 20 30 40 50 60 0 1 2 3 4 MAH content(mmol/g) [MAH] (wt-% ) 0 1 0 20 30 40 50 6 0 7 0 0 5 0 10 0 15 0 20 0 25 0 30 0 a b Ti 2 O(111) Ti2 O(101) Ti2 O(110) 2θ de g re e -b T i2O /P (S t-D V B )-M A H -a P (S t-D V B )-M A H Table.1 Characteristics of non-porous and porous polymer particles, and their corresponding TiO2-coated particles Symbol MAH Content Wt-% Particle size b) Porous properties Remarks DN PSDC) um Dpmax d) Vpe) Sf) nm mL/g m 2/g S1 0 6.16 1.01 - - - Non-porous
It can be inferred from these results that the surface area of the substrate particles was an important factor affecting the adsorption of TiO2 particles.
Online since: March 2015
Authors: G. Hardiman, Erni Setyowati, Sugeng Tirta Atmaja
Sawdust generated by certain Woods will have different properties.
Meanwhile, according to Bucur (2006) acoustic properties of wood that will be affected by noise emission characteristics of the specific wood material, the influence of the growth, humidity, elastic modulus, and chemical substances [4].
Physical properties of the material consists of the acoustic test, whereas density material consists Sound absorption coefficient Test and Transmission Loss (STL).
While bottom element is the most dominant exposed point of thrust.The smaller displacement and power structure of the material is getting a good deal.A good structure on a material is when Von misses did not exceed the limit of material so as not to melt occurring fractures (related to Safety factor) Material Density Test The density is the comparison between the weight and the volume of dry air composite boards.
The density value of the material is affected by the dimensions of the components forming the material.
Meanwhile, according to Bucur (2006) acoustic properties of wood that will be affected by noise emission characteristics of the specific wood material, the influence of the growth, humidity, elastic modulus, and chemical substances [4].
Physical properties of the material consists of the acoustic test, whereas density material consists Sound absorption coefficient Test and Transmission Loss (STL).
While bottom element is the most dominant exposed point of thrust.The smaller displacement and power structure of the material is getting a good deal.A good structure on a material is when Von misses did not exceed the limit of material so as not to melt occurring fractures (related to Safety factor) Material Density Test The density is the comparison between the weight and the volume of dry air composite boards.
The density value of the material is affected by the dimensions of the components forming the material.