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Online since: July 2014
Authors: Chen Miao, Bing Quan Sun, Li Wang, Da Wei Zhang
This study investigates carbonation properties of concrete mixed with alkaline potential water (APW).
Introduction Some studies suggest that the use of magnetized water can improve the strength of concrete mixing and carbonation properties[1,2].
Therefore, this paper studies the impact of potential water alkaline concrete carbonation properties, mainly to study the potential of water from the alkaline concrete carbonation properties and carbonation depth forecasting.
Effect of magnetic water on engineering properties of concrete containing granulated blast-furnace slag.
Cement and Concrete Research, 2000, (30): 599-605 [3] Sun Bingquan, Wang Lijiu, Study on the Properties of Concrete Mixed with Alkaline Redox Potential Water.
Introduction Some studies suggest that the use of magnetized water can improve the strength of concrete mixing and carbonation properties[1,2].
Therefore, this paper studies the impact of potential water alkaline concrete carbonation properties, mainly to study the potential of water from the alkaline concrete carbonation properties and carbonation depth forecasting.
Effect of magnetic water on engineering properties of concrete containing granulated blast-furnace slag.
Cement and Concrete Research, 2000, (30): 599-605 [3] Sun Bingquan, Wang Lijiu, Study on the Properties of Concrete Mixed with Alkaline Redox Potential Water.
Online since: March 2013
Authors: Ming Gang Wang, Zhan Kui Zhao, Zhao Zan
Theformer two factors eliminate adsorptive gas and impurities on surface of the power particles and the latter two promote sintering [12]; (2) Joule heating sintering mechanism: T.
In fact, most of the reported mechanisms of the SPS sintering process are close relationship with the pulse current which plays an important factor affecting the sintering.
Teramoto, et al., Microstructures and mechanical properties of titanium/biodegradable-polymer FGM for bone tissue fabricated by spark plasma sintering method, J.
Jiang, Effect of sintering temperatures on the room temperature properties of Al90Mn8Ce2 alloys, J.
Andersen, et al., Effect of spark plasma sintering (SPS) on the microstructure and mechanical properties of randomly packed hollow sphere (RHS) cell wall, Mater.
In fact, most of the reported mechanisms of the SPS sintering process are close relationship with the pulse current which plays an important factor affecting the sintering.
Teramoto, et al., Microstructures and mechanical properties of titanium/biodegradable-polymer FGM for bone tissue fabricated by spark plasma sintering method, J.
Jiang, Effect of sintering temperatures on the room temperature properties of Al90Mn8Ce2 alloys, J.
Andersen, et al., Effect of spark plasma sintering (SPS) on the microstructure and mechanical properties of randomly packed hollow sphere (RHS) cell wall, Mater.
Online since: August 2013
Authors: Zhi Heng Deng, Yi Liao, Chao Lou Meng, Hai Feng Yang
The current researches on the mechanical property of recycled coarse aggregate concrete mainly focus on the influences caused by factors such as replacement rate, aggregate strength and sources.
The physical property of recycled coarse aggregate concrete and ordinary concrete was tested according to Standard for Test Method of Mechanical Properties on Ordinary concrete (GB/ E 50081-2002) .
There hasn’t been a unified test standard for shearing property test yet.
However, different methods lead to different conclusions. [2] Considering the veracity and feasibility of shearing properties obtained from the above methods into consideration, this test adopted experimentation on equal height but varying width beam with four points under stress to test the shearing property of recycled aggregate concrete.
The cross-sections of these beams were affected by shear force only.
The physical property of recycled coarse aggregate concrete and ordinary concrete was tested according to Standard for Test Method of Mechanical Properties on Ordinary concrete (GB/ E 50081-2002) .
There hasn’t been a unified test standard for shearing property test yet.
However, different methods lead to different conclusions. [2] Considering the veracity and feasibility of shearing properties obtained from the above methods into consideration, this test adopted experimentation on equal height but varying width beam with four points under stress to test the shearing property of recycled aggregate concrete.
The cross-sections of these beams were affected by shear force only.
Online since: March 2012
Authors: Li Hong Cao
Using the PRO-E to build the 3D model of plastic closures and analyze the main shortages of the plastic closures and the corresponding countermeasures; the influencing factors like the polymer injection location, the pressure, the temperature and the time in the plastic closures molding process are studied in this paper based on Moldflow.
It is one of the common shortcomings of plastic products and it affects the plastic product’s appearance quality and the mechanical property.
The main factors influencing the buckling deformation are: (1) the buckling deformation is caused by the uneven cooling, i.e. the result of uneven contraction of the product along thickness direction.
The main factors include the uneven temperature in the cavity surface, the temperature change along the thickness direction and the thermal properties of the mold; (2) the buckling deformation is caused by the uneven contraction (also called the regional contraction), i.e. the result of uneven contraction of the whole plastic product.
The main factors include the molecular orientation, the glass fiber orientation, the polymer injection location, the cooling system design or the cooling parameters and the molding conditions.
It is one of the common shortcomings of plastic products and it affects the plastic product’s appearance quality and the mechanical property.
The main factors influencing the buckling deformation are: (1) the buckling deformation is caused by the uneven cooling, i.e. the result of uneven contraction of the product along thickness direction.
The main factors include the uneven temperature in the cavity surface, the temperature change along the thickness direction and the thermal properties of the mold; (2) the buckling deformation is caused by the uneven contraction (also called the regional contraction), i.e. the result of uneven contraction of the whole plastic product.
The main factors include the molecular orientation, the glass fiber orientation, the polymer injection location, the cooling system design or the cooling parameters and the molding conditions.
Online since: November 2014
Authors: Xiao Yang Xu, Xiao Hong Xu, Jian Feng Wu, Yang Zhou, De Zhi He
Introduction
Alumina ceramic is a potential ideal material for heat transmission pipes due to its high melting, outstanding mechanical properties, anti-corrosion and good wear resistance at room temperature as well as at higher temperatures.
Therefore, it is of great interest to study the preparation and characteristics of good thermal shock resistance and mechanical properties Al2O3-based composite ceramic under lower firing temperature for heat transmission pipes used in solar thermal power generation.
According to thermal shock evaluation factors[12], bending strength, microstructure, thermal expansion coefficient, thermal conductivity and Poisson’s ratio all affect the thermal shock behavior.
[2] Yin Z, Huang C, Zou B, et al, Study of the mechanical properties, strengthening and toughening mechanisms Al2O3/TiC micro-nano-composite ceramic tool material Materials Science and Engineering: A. 577 (2013) 9-15
Effect of SiC additions on microstructure, mechanical properties and thermal shock behaviour of alumina-mullite-zirconia composites Materials Science and Engineering A. 530 (2011) 585-590
Therefore, it is of great interest to study the preparation and characteristics of good thermal shock resistance and mechanical properties Al2O3-based composite ceramic under lower firing temperature for heat transmission pipes used in solar thermal power generation.
According to thermal shock evaluation factors[12], bending strength, microstructure, thermal expansion coefficient, thermal conductivity and Poisson’s ratio all affect the thermal shock behavior.
[2] Yin Z, Huang C, Zou B, et al, Study of the mechanical properties, strengthening and toughening mechanisms Al2O3/TiC micro-nano-composite ceramic tool material Materials Science and Engineering: A. 577 (2013) 9-15
Effect of SiC additions on microstructure, mechanical properties and thermal shock behaviour of alumina-mullite-zirconia composites Materials Science and Engineering A. 530 (2011) 585-590
Online since: April 2008
Authors: Jun Tao, Tian Cang Zhang, Peng Tao Liu, Jing Li, Yu Mang
With
thermal- mechanical coupling technique, and considering the geometrical non-linearity, the material
property non-linearity and the interface frictional non-linearity, a Finite Element Model (FEM) of
temperature, stress and deformation fields were constructed.
(3) The transfer coefficient between input mechanical power and heat power doesn't change with temperature
(4) Thermal and mechanical properties of the materials change with temperature
For such a highly nonlinear heat-deformation process, a thermo-mechanical coupled analysis must be applied.
Chinese Journal of Mechanical Engineering, 2004, 40(6): 144-148 (in Chinese) [4] Mark R D, Nei W B.
(3) The transfer coefficient between input mechanical power and heat power doesn't change with temperature
(4) Thermal and mechanical properties of the materials change with temperature
For such a highly nonlinear heat-deformation process, a thermo-mechanical coupled analysis must be applied.
Chinese Journal of Mechanical Engineering, 2004, 40(6): 144-148 (in Chinese) [4] Mark R D, Nei W B.
Online since: January 2012
Authors: Alexander M. Efremov, A.N. Levandovskiy, G. Bruno
Introduction
Mechanical properties of dense polycrystalline ceramic materials for environmental application (such as membranes and filters) are poorly known.
In fact, those materials are always manufactured as porous and sometimes cannot exist in dense state without microcracks in a wide range of temperatures, because of their large thermal expansion and mechanical properties anisotropy.
Conversely, if the properties of the porous material are available (i.e., p, eMacro , sMacro and are measured) the dense material properties and pore morphology (m) can be evaluated.
The input material properties are given in Table 1 (taken from literature [11]).
Input properties for the FEM calculations d Element size [mm] 3.36, 4.48 Ed Element Young's Modulus [GPa] 350 nd Element Poisson ratio 0.15 g Surface crack energy density [J/m2] 0.30, 0.45, 0.60 The finite element model of the pore structure consisted of cubic volume pixels (voxels) of the same size and with isotropic mechanical properties (Fig. 2a).
In fact, those materials are always manufactured as porous and sometimes cannot exist in dense state without microcracks in a wide range of temperatures, because of their large thermal expansion and mechanical properties anisotropy.
Conversely, if the properties of the porous material are available (i.e., p, eMacro , sMacro and
The input material properties are given in Table 1 (taken from literature [11]).
Input properties for the FEM calculations d Element size [mm] 3.36, 4.48 Ed Element Young's Modulus [GPa] 350 nd Element Poisson ratio 0.15 g Surface crack energy density [J/m2] 0.30, 0.45, 0.60 The finite element model of the pore structure consisted of cubic volume pixels (voxels) of the same size and with isotropic mechanical properties (Fig. 2a).
Online since: April 2013
Authors: Mohammad Gohari, Mona Tahmasebi, Roslan Abdul Rahman, Musa Mailah
Distribution pattern of spray boom in fields is affected by several parameters which one of the important reasons is horizontal and vertical vibrations because of unevenness surfaces.
It means, the inertia of spray boom can be heuristically introduced with a certain value regards to the system and mass properties.
Wills, Factors determining the design of tractor-mounted sprayer booms-sprayer nozzle characteristics, J.
De Baerdemaeker, DESIGN OF A CASCADE CONTROLLER FOR A FLEXIBLE SPRAY BOOM, Mechanical Systems and Signal Processing, 10(2) (1996) 197-210
Jamaluddin, Vehicles active suspension system using skyhook adaptive neuro active force control, Mechanical Systems and Signal Processing, 23(3) (2009) 855-868
It means, the inertia of spray boom can be heuristically introduced with a certain value regards to the system and mass properties.
Wills, Factors determining the design of tractor-mounted sprayer booms-sprayer nozzle characteristics, J.
De Baerdemaeker, DESIGN OF A CASCADE CONTROLLER FOR A FLEXIBLE SPRAY BOOM, Mechanical Systems and Signal Processing, 10(2) (1996) 197-210
Jamaluddin, Vehicles active suspension system using skyhook adaptive neuro active force control, Mechanical Systems and Signal Processing, 23(3) (2009) 855-868
Online since: December 2023
Authors: Ching Yu Hsu, Chia Chin Chiang, Ya Hui Chen
The mechanical properties of materials and related fatigue parameters are important components of a fatigue life estimation program.
The strain-life method mainly uses the material fatigue properties provided by the material’s strain-life curve to perform the life estimation.
There are two types of environmental factors set in material testing.
Comparison of mechanical properties of 316L at room temperature and 250℃.
In order to simplify the problem, only the influence of repeated thermal load on fatigue life is discussed, and the actual material damage caused by corrosion or other factors is not considered.
The strain-life method mainly uses the material fatigue properties provided by the material’s strain-life curve to perform the life estimation.
There are two types of environmental factors set in material testing.
Comparison of mechanical properties of 316L at room temperature and 250℃.
In order to simplify the problem, only the influence of repeated thermal load on fatigue life is discussed, and the actual material damage caused by corrosion or other factors is not considered.
Online since: December 2014
Authors: Hong Shan Zhao, Sha Sha Lian, Ling Shao
Wind turbines suffer much environmental interference; moreover, data-based fault prediction is vulnerable to occur false alarms by the impact of these factors.
So this paper presents a fault prediction method for the pitch-controlled system, which is based on the mathematical model of wind turbines physical properties.
Fault statistics can be seen from from domestic and foreign wind turbines[1,2], pitch system is one of the high incidence of fault mechanical components.
In view of the above analysis, this paper presents a fault prediction method for the pitch actuator, which is based on the mathematical model of wind turbines physical properties.
The model parameters rather than the operating parameters of the system parameters are utilized, which effectively reduces the impact of environmental factors and the input change.
So this paper presents a fault prediction method for the pitch-controlled system, which is based on the mathematical model of wind turbines physical properties.
Fault statistics can be seen from from domestic and foreign wind turbines[1,2], pitch system is one of the high incidence of fault mechanical components.
In view of the above analysis, this paper presents a fault prediction method for the pitch actuator, which is based on the mathematical model of wind turbines physical properties.
The model parameters rather than the operating parameters of the system parameters are utilized, which effectively reduces the impact of environmental factors and the input change.