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Online since: December 2013
Authors: Ke Wei Ding, Meng Li, Dong Chen
Considering about the economic factors, it chooses the core board of metal sandwich thermal insulation board which is suitable for Anhui Province.
The temperature of wave-amplitude ratio between internal and outside surfaces depends on physical properties and thickness of building envelop.
To intimate the thermal insulation properties of metal sandwich thermal insulation board assembled on enclosure structure of buildings more reliable, now the Ecotect shall be introduce in.
Avoiding unnecessary factors to ensure material type of core board is the only variable. 3.
The heat-retaining properties of building envelope can be shown from the heat input and output percentage intuitively because of all the same settings without building envelope.
The temperature of wave-amplitude ratio between internal and outside surfaces depends on physical properties and thickness of building envelop.
To intimate the thermal insulation properties of metal sandwich thermal insulation board assembled on enclosure structure of buildings more reliable, now the Ecotect shall be introduce in.
Avoiding unnecessary factors to ensure material type of core board is the only variable. 3.
The heat-retaining properties of building envelope can be shown from the heat input and output percentage intuitively because of all the same settings without building envelope.
Online since: August 2018
Authors: Teewara Suwan
Curing condition is one of the major factors affecting the mechanical properties and micro-structures of geopolymer.
Amount of calcium oxide influences the amount of calcium (Ca) which affects the properties of geopolymer cement positively and negatively depending on type and dosage of activators.
The sedimentary solid has both physical and chemical properties as a pozzolanic material.
It can be seen that the industrial waste (e.g. fly ash, mine tailing and GBFS) achieved the highest strength followed by natural mineral (metakaolin and natural pozzolan), while general waste (construction waste) seems to produce very low mechanical strength, although other factors, e.g.
However, other vital parameters for geopolymer synthesis are also included in Table 2, i.e. percentage of additives, testing age, heat-curing temperature and heat-curing duration, as the final properties of hardened geopolymer cement are quite sensitive to external factors.
Amount of calcium oxide influences the amount of calcium (Ca) which affects the properties of geopolymer cement positively and negatively depending on type and dosage of activators.
The sedimentary solid has both physical and chemical properties as a pozzolanic material.
It can be seen that the industrial waste (e.g. fly ash, mine tailing and GBFS) achieved the highest strength followed by natural mineral (metakaolin and natural pozzolan), while general waste (construction waste) seems to produce very low mechanical strength, although other factors, e.g.
However, other vital parameters for geopolymer synthesis are also included in Table 2, i.e. percentage of additives, testing age, heat-curing temperature and heat-curing duration, as the final properties of hardened geopolymer cement are quite sensitive to external factors.
Online since: January 2005
Authors: Jan Ji Sha, J.S. Park, Akira Kohyama, J. Yu, Tatsuya Hinoki
Acceptable performance of high temperature CMCs depends upon
judicious selection and incorporation of ceramic fiber reinforcement with the proper chemical,
physical and mechanical properties.
However, the mechanical properties and microstructure of reinforced fibers are very sensitive to the service environments [3-5].
Table 1 lists fibers' properties provided by the manufacturers.
The creep resistance of SiC fibers decreased with increasing the oxygen partial pressure, which is possibly controlled by the extrinsic and intrinsic factors.
For the intrinsic factors, when the fibers tested in low oxygen partial pressures, the grain growth/coarsening will occur due to coalescence of β SiC grain [11].
However, the mechanical properties and microstructure of reinforced fibers are very sensitive to the service environments [3-5].
Table 1 lists fibers' properties provided by the manufacturers.
The creep resistance of SiC fibers decreased with increasing the oxygen partial pressure, which is possibly controlled by the extrinsic and intrinsic factors.
For the intrinsic factors, when the fibers tested in low oxygen partial pressures, the grain growth/coarsening will occur due to coalescence of β SiC grain [11].
Online since: November 2013
Authors: Behzad Janipour, Nayereh Askari, Mahmood Khaloobagheri
Due to low mechanical properties, a highly conductive pure copper needs to be strengthened and new materials with superior characteristics have been developed.
It has been reported that with a small fraction of nano-sized reinforcements, MMNCs could obtain comparable or even far superior mechanical properties than MMCs.
In this study, the main aim is to improve high-temperature mechanical properties of ductile copper while keeping its electrical conductivity at a reasonable level.
For achieving optimized mechanical and electrical properties of the composite materials, it is significant to obtain uniform distribution of reinforcement in the matrix.
If reinforcement particles in the composites do not disperse uniformly, this affects mechanical and electrical properties of composites negatively [9].
It has been reported that with a small fraction of nano-sized reinforcements, MMNCs could obtain comparable or even far superior mechanical properties than MMCs.
In this study, the main aim is to improve high-temperature mechanical properties of ductile copper while keeping its electrical conductivity at a reasonable level.
For achieving optimized mechanical and electrical properties of the composite materials, it is significant to obtain uniform distribution of reinforcement in the matrix.
If reinforcement particles in the composites do not disperse uniformly, this affects mechanical and electrical properties of composites negatively [9].
Online since: June 2011
Authors: Min Li Zheng, Shu Cai Yang, Yi Hang Fan, De Qiang Zhang, Ning Liu
Periodic high-frequency serrated ship will cause fluctuations in the cutting force, which then affect the tool wear and surface integrity of workpiece and so on.
Davies and others[2][3]through experimental research, established the theoretical model of the serrated frequency and cutting speed, and proposed that the material hardness and cutting speed are the two main factors of chip morphology.
The workpiece used in this study was a Ti6Al4V bar with a diameter of 100m whose Chemical composition and mechanical properties are shown in Table 1 and Table 2.
Table 1 Chemical composition of Ti6Al4V(w%)[4] composition Al V Fe Si C O N H Others T i Wt% 5.5~6.8 3.5~4.5 0.3 0.15 0.1 0.2 0.05 0.015 0.5 remaining Table 2 Mechanical properties of Ti6Al4V Mould of elastic (E) Tensile strength σb Yield strength σs Poisson's ratio Elongation 119GPa 930MPa 855MPa 0.29 12% The chip is inlayed in a pointing machine.
A single factor experiment is completed with fixed ap and f, and variable vc.
Davies and others[2][3]through experimental research, established the theoretical model of the serrated frequency and cutting speed, and proposed that the material hardness and cutting speed are the two main factors of chip morphology.
The workpiece used in this study was a Ti6Al4V bar with a diameter of 100m whose Chemical composition and mechanical properties are shown in Table 1 and Table 2.
Table 1 Chemical composition of Ti6Al4V(w%)[4] composition Al V Fe Si C O N H Others T i Wt% 5.5~6.8 3.5~4.5 0.3 0.15 0.1 0.2 0.05 0.015 0.5 remaining Table 2 Mechanical properties of Ti6Al4V Mould of elastic (E) Tensile strength σb Yield strength σs Poisson's ratio Elongation 119GPa 930MPa 855MPa 0.29 12% The chip is inlayed in a pointing machine.
A single factor experiment is completed with fixed ap and f, and variable vc.
Online since: November 2013
Authors: Chayut Nuntadusit, Makatar Waehahyee
Normally, drying rubber sheet takes about 2-4 days depending on many factors such as temperature, velocity, humidity of hot gas in smoking room.
Important factor that affect the quality and cost of rubber smoked sheet is design of smoking room.
The physical property as color and surface condition after drying was inspected.
For the first part, the moisture ratio was decreased corresponding to decreasing of percent value of moisture in rubber, and it was also decreased corresponding to initial moisture value and external factors; jet velocity, jet temperature and jet-to-rubber sheet distance.
Kirirat, Factor affecting rubber sheet curing, RERIC Int.
Important factor that affect the quality and cost of rubber smoked sheet is design of smoking room.
The physical property as color and surface condition after drying was inspected.
For the first part, the moisture ratio was decreased corresponding to decreasing of percent value of moisture in rubber, and it was also decreased corresponding to initial moisture value and external factors; jet velocity, jet temperature and jet-to-rubber sheet distance.
Kirirat, Factor affecting rubber sheet curing, RERIC Int.
Online since: December 2013
Authors: S. Sharif, Denni Kurniawan, M.Y. Noordin, P.Y.M. Wibowo Ndaruhadi
Cutting direction and the tool coating are categorical factors, while the cutting speed and feed rate are numerical factors in the input data.
Variants 1 and 2 on each categorical factors were determined based on the general conditions used, while low (-1) and high (+1) numerical factor levels on each factor is assigned to the low and high value, respectively.
Considering the low cutting parameters set and the low cutting force involved in bone machining (although not measured here), the surface properties of the cutting tools at their initial stage are of importance.
Hence, the analysis that the better surface roughness of the machined bone is likely due to the properties of the coating when compared to the results obtained from uncoated tool.
In: AKM Nurul Amin (Ed.), Titanium Alloys, Towards Achieving Enhanced Properties for Diversified Applications, InTech., Croatia (2012), p. 117-138 [7] A Muhammad, M Rahman, WY San, Ultraprecision ductile mode machining of glass by micromilling process.
Variants 1 and 2 on each categorical factors were determined based on the general conditions used, while low (-1) and high (+1) numerical factor levels on each factor is assigned to the low and high value, respectively.
Considering the low cutting parameters set and the low cutting force involved in bone machining (although not measured here), the surface properties of the cutting tools at their initial stage are of importance.
Hence, the analysis that the better surface roughness of the machined bone is likely due to the properties of the coating when compared to the results obtained from uncoated tool.
In: AKM Nurul Amin (Ed.), Titanium Alloys, Towards Achieving Enhanced Properties for Diversified Applications, InTech., Croatia (2012), p. 117-138 [7] A Muhammad, M Rahman, WY San, Ultraprecision ductile mode machining of glass by micromilling process.
Online since: January 2012
Authors: Li Li Jin, Quan Ying Yan, Ran Zhou, Sui Lin Wang
Research on Effective Factors of Heat Transfer of Thin Heating Floor
Quanying Yan a, Lili Jinb, Ran Zhou c and Suilin Wang
Beijing Municipality Key Lab of Heating, Gas Supply, Ventilating and Air Conditioning Engineering,
Beijing University of Civil Engineering and Architecture, 100044,China
a yanquanying@bucea.edu.cn, bjinlili19880626@163.com
Keywords: numerical simulation, thin heating floor, floor surface temperature, heat flux
Abstract.
Research on low temperature radiant floor heating at home and abroad are theoretical and experimental research on thermal properties and mechanical properties and research on different heat source of the floor heating system, while research on optimizing the structure and the thin dry-type floor heating construction and design methods are less [1-7].
This paper made numerical simulation of heat transfer process in thin heating floor by ANSYS, analyzed the influence of some factors on heat transfer performance of the floor in order to play a guiding role in the practical application.
(2)Average floor surface temperature is affected and restricted by water temperature, pipe spacing, and the indoor temperature, taking into account the restrictions on the floor surface temperature, indoor temperature, average hot water temperature and pipe spacing should be selected to meet the requirements
Research on low temperature radiant floor heating at home and abroad are theoretical and experimental research on thermal properties and mechanical properties and research on different heat source of the floor heating system, while research on optimizing the structure and the thin dry-type floor heating construction and design methods are less [1-7].
This paper made numerical simulation of heat transfer process in thin heating floor by ANSYS, analyzed the influence of some factors on heat transfer performance of the floor in order to play a guiding role in the practical application.
(2)Average floor surface temperature is affected and restricted by water temperature, pipe spacing, and the indoor temperature, taking into account the restrictions on the floor surface temperature, indoor temperature, average hot water temperature and pipe spacing should be selected to meet the requirements
Online since: November 2023
Authors: Vincent Chai, Christopher Lim, Sicong Chen
In this paper, we explore the compatibility and understand the impact factors, based on commonly used resist (i.e., KrF and i-line system resist) and wet etch chemicals (i.e.
In general, the compatibility can be affected by both resist and wet etchant properties.
For example, resist type, resist thickness, resist pre-treatment, resist post-treatment, resist surface properties, wet etchant species, wet etchant concentration, etc.
No resist lifting may be because the soaked resist still maintains the mechanical properties without polymer chain broken.
Because the polymer types affect the free volume size of resist, i-line D should have a smaller free volume size than KrF C [3].
In general, the compatibility can be affected by both resist and wet etchant properties.
For example, resist type, resist thickness, resist pre-treatment, resist post-treatment, resist surface properties, wet etchant species, wet etchant concentration, etc.
No resist lifting may be because the soaked resist still maintains the mechanical properties without polymer chain broken.
Because the polymer types affect the free volume size of resist, i-line D should have a smaller free volume size than KrF C [3].
Online since: June 2015
Authors: Carlos Roberto Grandini
The diffusion coefficients, pre-exponential factors, and activation energies were calculated for oxygen and nitrogen in these alloys.
Mo shows β-stabilizing properties in Ti alloys.
The Ti–Mo system has been studied thoroughly, with a particular emphasis on its microstructure and mechanical properties [18, 19].
The addition of interstitial elements such as O, C, N, and H can significantly alter the mechanical properties of the alloy, especially its elastic properties, leading to hardening or softening of the alloy [24].
Results and Discussion The diffusion of interstitial atoms in a bcc lattice can affect mechanical properties by three mechanisms: the stress-induced ordering of interstitial atoms among the possible sets of interstitial sites (Snoek Effect), segregation of interstitials to form dislocations, and precipitation.
Mo shows β-stabilizing properties in Ti alloys.
The Ti–Mo system has been studied thoroughly, with a particular emphasis on its microstructure and mechanical properties [18, 19].
The addition of interstitial elements such as O, C, N, and H can significantly alter the mechanical properties of the alloy, especially its elastic properties, leading to hardening or softening of the alloy [24].
Results and Discussion The diffusion of interstitial atoms in a bcc lattice can affect mechanical properties by three mechanisms: the stress-induced ordering of interstitial atoms among the possible sets of interstitial sites (Snoek Effect), segregation of interstitials to form dislocations, and precipitation.