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Online since: April 2013
Authors: Yan Gao, Ya Zhou Jing, Hai Shan Li, Guo Jun Zhao
Regarding to the residential buildings, the condition of its thermal properties finally manifests through the architectural form and thermal performance of building enclosure.
It affects not only the possible solar radiation heat gain, but also the heat exchange between indoor and outdoor.
But in the former study, using mode of residential building has not been considered as one factor that influences the energy consumption of air conditioning.
Based on these, nature priority and all mechanical modes of the residential building are designed in this paper.
This differs from the results under all mechanical mode.
It affects not only the possible solar radiation heat gain, but also the heat exchange between indoor and outdoor.
But in the former study, using mode of residential building has not been considered as one factor that influences the energy consumption of air conditioning.
Based on these, nature priority and all mechanical modes of the residential building are designed in this paper.
This differs from the results under all mechanical mode.
Online since: February 2011
Authors: Qing Song Xiong, Pin Chen, Sheng Zhang, Zhao Hua Wu
It has affected the quality of the signal transmission line, resulting in circuit performance and reliability of electronic system decreasing.
The victim network and interfered network will both be affected each other when coupling occurs.
Some of the parameters which are inherent properties of materials usually unchanged.
The reason is that when the impedance of microstrip deviates from the standard impedance and increases from 25Ω to 100Ω,the width becomes narrower, the insertion loss and the reflection gradually become larger, so the electrical properties becomes worse.
Analyzing the affection of coupling loss to the signal transmission performance When signal transports in the microstrip, in addition to its own conductor loss and dielectric loss, the adjacent transmission lines have energy loss caused by the coupling affecting the signal transmission performance.
The victim network and interfered network will both be affected each other when coupling occurs.
Some of the parameters which are inherent properties of materials usually unchanged.
The reason is that when the impedance of microstrip deviates from the standard impedance and increases from 25Ω to 100Ω,the width becomes narrower, the insertion loss and the reflection gradually become larger, so the electrical properties becomes worse.
Analyzing the affection of coupling loss to the signal transmission performance When signal transports in the microstrip, in addition to its own conductor loss and dielectric loss, the adjacent transmission lines have energy loss caused by the coupling affecting the signal transmission performance.
Online since: September 2014
Authors: Xiao Ying Wu, Fan Li
The numerical simulation is considered the influence of three factors on the penetration effect, including fragment penetrating speed, fragment shape and tube thickness.
When the initial velocity is larger, the higher the penetration speed to maintain process fragment penetrating tube, and tube resistance affected by.
In fact, there are many factors, such as fragments of material, material of tube, fragment angle changes, we further analysis.
(Mechanical Industry Press, China2010.5 ),p.89-93
[3] Z.X.Liu:Study on the Anti Penetration Properties of Ceramics and Fiber Composite Plate(MS Wuhan University of Science and Technology, China 2010),p.89
When the initial velocity is larger, the higher the penetration speed to maintain process fragment penetrating tube, and tube resistance affected by.
In fact, there are many factors, such as fragments of material, material of tube, fragment angle changes, we further analysis.
(Mechanical Industry Press, China2010.5 ),p.89-93
[3] Z.X.Liu:Study on the Anti Penetration Properties of Ceramics and Fiber Composite Plate(MS Wuhan University of Science and Technology, China 2010),p.89
Online since: July 2004
Authors: Eduardo A. Pérez R, Roberto M. Souza
Introduction
The development of components and parts with high functionality frequently envolves the
selection of options where materials with different mechanical properties are combined.
Depending on the mechanical properties of the material, a pile-up (Fig. 1a) or sinkin (Fig. 1b) morphology may be observed [6,15,16].
The elastic and thermal properties of the aluminum (elastic modulus E= 68.9 GPa, Poisson ratio ν=0.33 and coefficient of thermal expansion α=23.6 x 10-6 K -1) were taken from the literature [9].
Fig. 4b, 4d and 4f also allow observing that the load is an important factor regarding the diameter of the cavity generated during the indentation.
In this case, one factor that would be representative of that tendency is the plastic deformation of the substrate.
Depending on the mechanical properties of the material, a pile-up (Fig. 1a) or sinkin (Fig. 1b) morphology may be observed [6,15,16].
The elastic and thermal properties of the aluminum (elastic modulus E= 68.9 GPa, Poisson ratio ν=0.33 and coefficient of thermal expansion α=23.6 x 10-6 K -1) were taken from the literature [9].
Fig. 4b, 4d and 4f also allow observing that the load is an important factor regarding the diameter of the cavity generated during the indentation.
In this case, one factor that would be representative of that tendency is the plastic deformation of the substrate.
Online since: February 2011
Authors: Jian Zhong Cui, Fu Qu
Fig.1 Schematic diagram of air film semi-continuous casting with magnetic field
Results and discussion
Effects of frequency on surface quality
Stability of air film is the key factor to air film casting process, and it can be observed directly.
The mechanical balance of meniscus can not be undermined, and the air film is stable; as a result, the fold disappeared, but a lot of segregations appeared on ingot surface, as shown in Fig. 2(b).
Surface exudation is determined by primary cooling intensity and the height of solidified shell, which mainly affect (affects) the solute concentration near the ingot surface [8,9].
In the process of air film casting, the thickness of air film affects the primary cooling of the mould.
Effect of low frequency electromagnetic field on the as-cast microstructures and mechanical properties of superhigh strength aluminum alloy.
The mechanical balance of meniscus can not be undermined, and the air film is stable; as a result, the fold disappeared, but a lot of segregations appeared on ingot surface, as shown in Fig. 2(b).
Surface exudation is determined by primary cooling intensity and the height of solidified shell, which mainly affect (affects) the solute concentration near the ingot surface [8,9].
In the process of air film casting, the thickness of air film affects the primary cooling of the mould.
Effect of low frequency electromagnetic field on the as-cast microstructures and mechanical properties of superhigh strength aluminum alloy.
Online since: December 2010
Authors: Jian You Long
Simulation Investigation for Heat Transfer in Fin-tube Thermal Storage Unit with Phase Change Material
Jianyou Long
Department of Mechanical and Electronic Engineering, Shunde Polytechnic College, Foshan Guangdong528333, P R China
jianyoulong@163.com
Keywords: fin-tube; phase change; heat transfer; simulation
Abstract:This paper addresses a simulation investigation of a fin-tube thermal storage unit involving phase change process dominated by heat conduction.
Because its heat transfer performance is affected by many factors, such as thermal properties of PCM and geometrical sizes of fin-tube thermal storage unit, it is so complicated that it is difficult to calculate or simulate its heat transfer process.
Following simulation aims to show that how the inlet water temperature affects heat release process when the fin distance is 12fin/inch.
This is because outlet water temperature is decided by inlet water temperature and temperature increasing in thermal storage unit (Outlet=Tinlet+△T), and thermal resistance, which affects temperature increasing greatly, gradually dominated with time increasing.
Because its heat transfer performance is affected by many factors, such as thermal properties of PCM and geometrical sizes of fin-tube thermal storage unit, it is so complicated that it is difficult to calculate or simulate its heat transfer process.
Following simulation aims to show that how the inlet water temperature affects heat release process when the fin distance is 12fin/inch.
This is because outlet water temperature is decided by inlet water temperature and temperature increasing in thermal storage unit (Outlet=Tinlet+△T), and thermal resistance, which affects temperature increasing greatly, gradually dominated with time increasing.
Online since: April 2014
Authors: Peter Bernasovský
Liquid metal embrittlement is caused by a combination of two factors [2].
These are 1) The presence of a specific liquid (molten)metal in contact with the affected component or structure, and 2) An applied or residual tensile stress acting on the affected component or structure while in contact with the liquid metal.
The hardness and deformation behavior of the solid metal affect its susceptibility to LME.
Table 1 Chemical composition [wt %] and mechanical properties of the 15 G2S steel C Mn Si P S Cr Ni Cu Ti 0.14 -0.15 1.37 – 1.45 1.07 – 1.08 0.014 0.029 0.06 0.05 0.08 0.032 Re [MPa] Rm [MPa] A5[%] ChV FATT (50 J.cm-2) Upper shelf 387 - 404 591 - 612 22 -27 + 14°C 55 j.cm-2 Fig. 1 A crack along the spirally weld joint Fig. 2 a) Linear and opposite runs misalignment – poor workmanship Fig. 2 b) Liquid metal embrittlement by Cu in the HAZ of repair weld.
These are 1) The presence of a specific liquid (molten)metal in contact with the affected component or structure, and 2) An applied or residual tensile stress acting on the affected component or structure while in contact with the liquid metal.
The hardness and deformation behavior of the solid metal affect its susceptibility to LME.
Table 1 Chemical composition [wt %] and mechanical properties of the 15 G2S steel C Mn Si P S Cr Ni Cu Ti 0.14 -0.15 1.37 – 1.45 1.07 – 1.08 0.014 0.029 0.06 0.05 0.08 0.032 Re [MPa] Rm [MPa] A5[%] ChV FATT (50 J.cm-2) Upper shelf 387 - 404 591 - 612 22 -27 + 14°C 55 j.cm-2 Fig. 1 A crack along the spirally weld joint Fig. 2 a) Linear and opposite runs misalignment – poor workmanship Fig. 2 b) Liquid metal embrittlement by Cu in the HAZ of repair weld.
Online since: July 2017
Authors: Antonio Formisano, Domenico Brigante, Alessandro Mauro, Giuseppe La Manna Ambrosino
The growing number of earthquakes that affected the country in recent years caused a strong and growing interest in novel materials, different from traditional ones, which the composite materials, especially under form of Fiber Reinforced Polymers (FRP), belong to.
Under persistent loads, the materials that provide the best mechanical characteristics to the system in terms of long-term duration are the carbon fibers, while the matrix is always of epoxy type.
Table 1: Conversion factor for long-term effects ηl for several FRP systems (Guidelines of the Italian Public Works Superior Council) [3,4].
The geometry of such plates is dimensioned in function of the geometrical and mechanical characteristics of the element to be reinforced and also of the load to be applied.
Table 2: Mechanical properties of the AFRP rope.
Under persistent loads, the materials that provide the best mechanical characteristics to the system in terms of long-term duration are the carbon fibers, while the matrix is always of epoxy type.
Table 1: Conversion factor for long-term effects ηl for several FRP systems (Guidelines of the Italian Public Works Superior Council) [3,4].
The geometry of such plates is dimensioned in function of the geometrical and mechanical characteristics of the element to be reinforced and also of the load to be applied.
Table 2: Mechanical properties of the AFRP rope.
Online since: March 2014
Authors: Sara Caprioli, Anders Ekberg
In contrast to [2], [3] and [4] that investigate the
influence of rolling contact loading on crack growth using stress intensity factors or J-integral measures,
the current study focuses on effects of cracks on bulk material deformation.
Previous studies (a) Larger, radial thermal cracks (b) Network of thermal cracks around periodic small wheel flats Fig. 1: Examples of operational thermal and thermomechanical crackshave shown that the thermal loading induce additional thermal stresses and alter material properties of the wheel material, which will eventually promote RCF crack formation, [5].
The effect of the crack depth on the mechanical response in the bulk material in-between the surface cracks is quantified.
re-profiling procedures) for wheels affected by shallow thermal cracking.
In: Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 224.5 (Sept. 2010), pp. 435-443.
Previous studies (a) Larger, radial thermal cracks (b) Network of thermal cracks around periodic small wheel flats Fig. 1: Examples of operational thermal and thermomechanical crackshave shown that the thermal loading induce additional thermal stresses and alter material properties of the wheel material, which will eventually promote RCF crack formation, [5].
The effect of the crack depth on the mechanical response in the bulk material in-between the surface cracks is quantified.
re-profiling procedures) for wheels affected by shallow thermal cracking.
In: Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 224.5 (Sept. 2010), pp. 435-443.
Online since: February 2026
Authors: Mohamad Hafiz Mamat, Noor Asnida Asli, Mohd Hanapiah Abdullah, Nor Diyana Md. Sin, Mohamad Zhafran Hussin, Fatimah Khairiah Abd Hamid, Shahirah Ahmad Kamal
Furthermore, it is possible that at higher doping concentrations, the growth kinetics are influenced by the interplay of these factors, leading to a different size distribution.
These structural changes were reflected in the sensing properties.
Bai, Preparation and properties of humidity sensor based on K-doped ZnO nanostructure, J.
Wang, Properties of ZnO with oxygen vacancies and its application in humidity sensor, J.
Costa, Electrical properties of Sn-doped Ba₀.₇₅Sr₀.₂₅Ti₀.₉₅O₃ perovskite, Ceram.
These structural changes were reflected in the sensing properties.
Bai, Preparation and properties of humidity sensor based on K-doped ZnO nanostructure, J.
Wang, Properties of ZnO with oxygen vacancies and its application in humidity sensor, J.
Costa, Electrical properties of Sn-doped Ba₀.₇₅Sr₀.₂₅Ti₀.₉₅O₃ perovskite, Ceram.