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Online since: October 2022
Authors: Emmanuel O. Sangotayo, Olukunle E. Itabiyi
Impact of the Thermophysical Properties of a CuO-H2O-Based Nanofluid on the Performance of a Cylindrical Solar Concentrator
Emmanuel O.
The results demonstrated that increasing the mass flow rate of the nanofluids improves the heat transmission properties.
The impact of thermophysical attributes on thermal effectiveness results in improved thermal efficacy, heat transfer characteristics of nanofluids, and factors influencing its features in solar collectors, which determines its usability.
Concentration, structure, dimensions, substance, base fluid, and temperature all affect the properties of nanoparticles.
Also the ANOVA-based analysis of the interaction between nanofluid thermophysical properties and PTSC performance confirms, with 95% confidence, that there is a significant variance in the interactions between nanofluid thermophysical properties and thermal efficiency at different flow rates, and that thermophysical properties have a significant impact on PTSC performance.
The results demonstrated that increasing the mass flow rate of the nanofluids improves the heat transmission properties.
The impact of thermophysical attributes on thermal effectiveness results in improved thermal efficacy, heat transfer characteristics of nanofluids, and factors influencing its features in solar collectors, which determines its usability.
Concentration, structure, dimensions, substance, base fluid, and temperature all affect the properties of nanoparticles.
Also the ANOVA-based analysis of the interaction between nanofluid thermophysical properties and PTSC performance confirms, with 95% confidence, that there is a significant variance in the interactions between nanofluid thermophysical properties and thermal efficiency at different flow rates, and that thermophysical properties have a significant impact on PTSC performance.
Online since: September 2007
Authors: Shoichi Kikuchi, Yutaka Kameyama, Kengo Fukazawa, Jun Komotori
The Effect of Hybrid Surface Modification; Combination of Fine Particle
Bombardment Treatment and Nitriding, on Fatigue Properties of Steel
Shoichi Kikuchi1, a, Jun Komotori2, b, Yutaka Kameyama
1, c
and Kengo Fukazawa3, d
1
Graduate school of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kouhoku-ku,
Yokohama-shi, Kanagawa, 223-8522, Japan
2
Department of Mechanical Engineering, Keio University, 3-14-1, Hiyoshi, Kouhoku-ku,
Yokohama-shi, Kanagawa, 223-8522, Japan
3
Neturen Co., Ltd.
In order to clarify the effects of the hybrid surface modification process; a combination of Fine Particle Bombardment (FPB) treatment and nitriding, on the fatigue properties of AISI 4135 steel (stress concentration factor: α=2.36), high cycle fatigue tests were carried out with a rotational bending machine at room temperature.
It was revealed that treating process sequence did affect residual stress distributions.
The aims of this study are to propose a new hybrid surface modification process; a combination of Fine Particle Bombardment (FPB) treatment and nitriding and to clarify the effects of this hybrid surface modification process on fatigue properties of AISI 4135 steel.
Steel bars of a 16mm in diameter were machined into the notched specimen with a stress concentration factor; α = 2.36.
In order to clarify the effects of the hybrid surface modification process; a combination of Fine Particle Bombardment (FPB) treatment and nitriding, on the fatigue properties of AISI 4135 steel (stress concentration factor: α=2.36), high cycle fatigue tests were carried out with a rotational bending machine at room temperature.
It was revealed that treating process sequence did affect residual stress distributions.
The aims of this study are to propose a new hybrid surface modification process; a combination of Fine Particle Bombardment (FPB) treatment and nitriding and to clarify the effects of this hybrid surface modification process on fatigue properties of AISI 4135 steel.
Steel bars of a 16mm in diameter were machined into the notched specimen with a stress concentration factor; α = 2.36.
Online since: July 2013
Authors: Zhong Yun Fan, Zen Cassinath, Ming Xu Xia, Huang Yan
The microstructures consisted mainly of globular primary phase α-Mg particles embedded in a secondarily solidified dendritic network with consistent properties along both the longitudinal and transverse cross sections.
There are two major factors that contribute to the development of the non-dendritic structure of the slurry within the extruder.
Mechanical Behaviour.
These factors were seen to directly impact the mechanical behaviour of the extruded rods.
Pinet, Correlating the microstructure and the tensile properties of a thixomouldedAZ91D Mg Alloy, Acta Mater. 49 (2001) 1225-1235.
There are two major factors that contribute to the development of the non-dendritic structure of the slurry within the extruder.
Mechanical Behaviour.
These factors were seen to directly impact the mechanical behaviour of the extruded rods.
Pinet, Correlating the microstructure and the tensile properties of a thixomouldedAZ91D Mg Alloy, Acta Mater. 49 (2001) 1225-1235.
Online since: January 2013
Authors: Shang Song Qin, Yuan Zhen Liu, Zhu Li, Yan Jia Guo
Intorduction
As a new type of building materials, the thermal insulation glazed hollow bead concrete has been extensively validated and recognized for its good mechanical properties and thermal properties[1-2].
Compared with the mechanical properties and thermal performance, the relevant study on durability is rare.
Concrete carbonation is a complex physical and chemical process, and it is affected by many factors.
By analyzing the ordinary concrete carbonation mechanism and its influence factors [3], the paper analyze the thermal insulation glazed hollow bead concrete carbonation in the theory way for the first time.
Research and Analysis of Mechanical Properties & Thermal Properties of Thermal Insulation Glazed Hollow Bead and Ceramisite Bearing Concrete [D].
Compared with the mechanical properties and thermal performance, the relevant study on durability is rare.
Concrete carbonation is a complex physical and chemical process, and it is affected by many factors.
By analyzing the ordinary concrete carbonation mechanism and its influence factors [3], the paper analyze the thermal insulation glazed hollow bead concrete carbonation in the theory way for the first time.
Research and Analysis of Mechanical Properties & Thermal Properties of Thermal Insulation Glazed Hollow Bead and Ceramisite Bearing Concrete [D].
Online since: March 2018
Authors: Krit Sutjarittangtham, Gobwute Rujijanagul, Kamonpan Pengpat, Uraiwan Intatha, Jerapong Tontrakoon, Wilaiwan Leenakul, Sukum Eitssayeam, Tawee Tunkasiri
However, the properties of the composites depend on their relative amounts and their interconnection, which is termed as connectivity.
Comparison of the densities and dielectric properties of this work against calculated values.
Herbert, Electroceramics Materials Properties Application.
Herbert, Electroceramics Materials Properties Application.
Zhang, Electrical and elastic properties of 1-3 PZT/epoxy piezoelectric composites, J.
Comparison of the densities and dielectric properties of this work against calculated values.
Herbert, Electroceramics Materials Properties Application.
Herbert, Electroceramics Materials Properties Application.
Zhang, Electrical and elastic properties of 1-3 PZT/epoxy piezoelectric composites, J.
Online since: August 2018
Authors: Wen Zhong Lu, Meng Meng Hao, Gui Fen Fan, Hao Yuan Deng, Kai Wang, Chen Hui Li, Yu Sheng Shi
The loss may be due to the interplay of various factors.
And the influence of single factor is easily overlapped by other factors.
Recently, many scholars conducted a series of experiments to deduce original correlations between electrical breakdown strength and mechanical or tribological properties [12,13,14].
Das, Effect of powder, chemistry and morphology on the dielectric properties of liquid-phase-sinted alumina.
Jiang, Microstructure and mechanical properties of porous alumina ceramic prepared by a combination of 3–D printing and sintering, Ceram.
And the influence of single factor is easily overlapped by other factors.
Recently, many scholars conducted a series of experiments to deduce original correlations between electrical breakdown strength and mechanical or tribological properties [12,13,14].
Das, Effect of powder, chemistry and morphology on the dielectric properties of liquid-phase-sinted alumina.
Jiang, Microstructure and mechanical properties of porous alumina ceramic prepared by a combination of 3–D printing and sintering, Ceram.
Online since: July 2011
Authors: Peng Dong, Hai Liang Wang, Xin Lei Yang, Quan Chang Ren
The Issues on the BF Application in the Bridge Engineering
The above information shows that the mechanical characteristics of the BF concrete should be strengthened, the research on the basalt fiber concrete mechanical property is just beginning in the field of fiber reinforced concrete[19,20].
Research on mechanical properties of BF reinforced beams.
Many factors affect the fiber material reinforcement effect, including the layers of FRP, reinforcement spacing, treatment methods of component surface, sheet thickness, stress level of existing structures, etc.
From test results, the main factors which affect the basalt fiber reinforcement effect can be identified.
At the same time, we can master the mechanical properties of basalt fiber reinforcement of existing bridges systematically by comparison test.
Research on mechanical properties of BF reinforced beams.
Many factors affect the fiber material reinforcement effect, including the layers of FRP, reinforcement spacing, treatment methods of component surface, sheet thickness, stress level of existing structures, etc.
From test results, the main factors which affect the basalt fiber reinforcement effect can be identified.
At the same time, we can master the mechanical properties of basalt fiber reinforcement of existing bridges systematically by comparison test.
Online since: April 2015
Authors: Ridho Bayuaji, Boedi Wibowo, Srie Subekti, Januarty Jaya Ekaputri, Muhammad Sigit Darmawan, Nur Ahmad Husin
The compressive strength is important mechanical properties for construction material.
Physical and chemical analysis properties of FA has been performed at Energy Laboratory ITS (Institut Technology of Sepuluh Nopember Surabaya).
A statistical analysis was performed to determine the statistically significant factors and data analysis therefore this table has no units.
Geopolymer concrete (GB) properties are highly dependent upon the type, ratios and concentrations of mixing constituents.
MS Darmawan, et al., The Effect of Chloride Environment on Mechanical Properties Geopolymer Binder with Fly Ash.
Physical and chemical analysis properties of FA has been performed at Energy Laboratory ITS (Institut Technology of Sepuluh Nopember Surabaya).
A statistical analysis was performed to determine the statistically significant factors and data analysis therefore this table has no units.
Geopolymer concrete (GB) properties are highly dependent upon the type, ratios and concentrations of mixing constituents.
MS Darmawan, et al., The Effect of Chloride Environment on Mechanical Properties Geopolymer Binder with Fly Ash.
Online since: January 2013
Authors: Yong Chang Guo, Yi Feng Liu, Jian Hong Zhang
Due to excellent mechanical properties and high working efficiency, FRP sheet has attracted significant attention from the field of strengthening in civil engineering.
At present, most researchers agree that the stress level of the reinforcing steel is the deciding factor of the fatigue life of FRP-strengthened beams.
Environmental Effects Environment is an important factor in evaluating the fatigue performance of FRP-strengthened beams.
It may result in degradation of the properties of the materials, affect the bonding properties, thus reduce the durability of reinforced beams.
This phenomenon could be explained that for higher degrees of corrosion, the pits did not significantly change the bar geometry, and thus the stress concentration factor at the ribs did not significantly change.
At present, most researchers agree that the stress level of the reinforcing steel is the deciding factor of the fatigue life of FRP-strengthened beams.
Environmental Effects Environment is an important factor in evaluating the fatigue performance of FRP-strengthened beams.
It may result in degradation of the properties of the materials, affect the bonding properties, thus reduce the durability of reinforced beams.
This phenomenon could be explained that for higher degrees of corrosion, the pits did not significantly change the bar geometry, and thus the stress concentration factor at the ribs did not significantly change.
Online since: July 2018
Authors: Ying Shi Sun, Duo Sun
As the heat source moves, the temperature of the entire weldment changes rapidly with time and space, and the physical properties of the materials also vary drastically with temperature.
A number of factors affect the temperature field, such as the heat source of welding, welding speed, size of welding materials, boundary conditions, thermophysical properties of materials and other parameters.
Consequently, the calculation of the temperature field should take into account the above factors [6].
The Gauss heat source model has been applied to simulate argon arc welding in this paper, and the thermophysical properties of materials are given in Table 1.
Connotation and Development of Mechanical Reliability-based Design.
A number of factors affect the temperature field, such as the heat source of welding, welding speed, size of welding materials, boundary conditions, thermophysical properties of materials and other parameters.
Consequently, the calculation of the temperature field should take into account the above factors [6].
The Gauss heat source model has been applied to simulate argon arc welding in this paper, and the thermophysical properties of materials are given in Table 1.
Connotation and Development of Mechanical Reliability-based Design.