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Online since: April 2009
Authors: M.P. Hierro, F.J. Pérez, F.J. Bolívar, L. Sánchez
The major factors affecting the efficiency of the conventional steam power plants are the temperature and, to a lesser extent, the pressure of the steam entering the turbine.
The major factors affecting the efficiency of power plants is the temperature and, to lesser extent, pressure of the steam entering the turbine.
The Si is well known for its beneficial effect on the oxidation resistance of Fe-Cr system [1820] but when the Si is addition as element of alloy can affect the mechanical properties.
This fact reduces significantly the kinetic of growth the oxide scale in these steles in steam conditions at a temperature of 650 0C. 3) The main advantages of the deposition of Si coatings are that it can be realized at temperatures below 600 0C, in short times, at a low cost without affecting the microstructure of the materials and mechanical properties.
Hoyer, W, Structural properties of liquid Fe-Si alloys.
Online since: August 2004
Authors: Akira Shimamoto, Taku Shimomura, Hidenori Osako
In this study, we conducted the experiments to reveal how anisotropic properties of polymetric materials affect to the deformation behaviors near the crack-tip under equal and unequal biaxial stress conditions.
Figure 2 and Table 1 show the shapes, dimensions and optical properties of the specimens.
We examined how the isotropic and anisotropic properties of the polycarbonate materials affect differently on the crack-tip under equal biaxial stress by using photoelasticity and the caustic method.
We examined how the isotropic and anisotropic properties of Fig. 9.
Conclusions The stress intensity factors, KI, KII of polycarbonate band plates with isotropic and anisotropic properties under equal and unequal biaxial stress conditions were found by photoelasticity and the caustic method, and compared.
Online since: February 2014
Authors: Ritu Gupta, Norrozila Sulaiman, Mohammed Dalour Hossain Beg, Arun Gupta
It is important to include the factor of coupling agent, when making predictions the properties of the composites through the models.
The low compatibility and interfacial adhesion of such composites results into low mechanical and thermal properties of the final products [5], [6], [7].
Background Wood Plastic Composite (WPC) properties depend upon many factors such as strength of wood fibers, modulus of fibers, fiber length and diameter, fiber weight percent, fiber orientation [8]-[11].
However, studies made on composites suggest that coupling agent is also a crucial factor to obtain better composite properties.
Daneaulf, Influence of coupling agents and treatments on the mechanical properties of cellulose fiber-polystyrene composites.
Online since: February 2011
Authors: Bing Xing Wang, Guo Dong Wang, Yong Tian, Zhao Dong Wang, Jun Ping Chen, Guo Yuan
The temperature profile of plate was completed on the run-out table so that the product with fine microstructure and good mechanical properties was produced.
The mechanical properties and microstructure of the final product are shown in Table 4 and Fig.7.
The microstructure of product is bainite, so the mechanical property is relatively higher, at the other hand, the elongation is also better.
Effects of Control Cooling on Mechanical Properties of C-Mn Steel[J].
Control of Factors Affecting Homogeneous Cooling of Plate Furing Controlled Cooling[J], Wide and Heavy Plate, 2000, 6(1):1~6, (in Chinese)
Online since: September 2022
Authors: Hadj Mostefa Adda, Merdaci Slimane, Zerrouki Otmane
These differences result in the creation of a non-homogeneous macrostructure with different thermo-mechanical properties all the time.
The above power-law assumption is based on a simple rule about how to get the best properties from a mixture of ceramic and metal.
In terms of the impact of varied heat loads and porosity on axial stresses, Figure 5 enables them to underline the importance of these factors.
The power law type of gradation of properties across thickness has been studied, and homogeneous isotropic plates have been compared.
[18] Aqida, S.N., Ghazali, M.I., Hashim, J., Effects of porosity on mechanical properties of metal matrix composite: an overview, J.
Online since: March 2006
Authors: Qing Chun Zhou, Qian Sheng, Jing Zeng
Generally, the main influence factors of the stability of surrounding rock mass are geological structure, in situ stress, the mechanical properties of rock mass, scale and buried depth of power house, the order of excavation and support scheme.
Displacement and Stress Field Impacted by the Mechanical Properties of F211 In order to study the displacement field and stress field impacted by the mechanical properties of f211, the computational scheme to reduce the parameters of f211 as lower value in Table 1 is considered.
Displacement and Stress Field Impacted by The Mechanical Properties of Quartzite In order to study the excavation displacement field and stress field impacted by the mechanical properties of quartzite, the simulation analysis were carried out by increasing the mechanical properties of quartzite rock mass to II species rock mass or reducing that to IV1 species.
Conclusions From the research and analysis work described above, the summary can be obtained for the Yantan extended hydropower project: (1) The mechanical properties of fault f211 are weaker relatively.
The mechanical properties of quartzite is better relatively, its relative location to the power house has no obvious influence to the stability of the power house.
Online since: February 2013
Authors: Yong Jie Liu, Xiao Zhao, Qingyuan Wang
The mechanical properties such as compressive strength, tensile strength, water absorption and shrinkage are presented.
Up to now, there have been no specific standards for recycled aggregate brick testing in China and most of the mechanical properties test is performed according to the Chinese standard GB/T 2542-2003 “Standard for Test Method of Mechanical Properties of brick”.
On account of the transportation cost of construction and building wastes and other factors, the cost of bricks may be substantially higher than those of conventional bricks at several places.
Properties of concrete blocks prepared with low grade recycled aggregates[J].
Properties of masonry blocks produced with waste limestone sawdust and glass powder[J].
Online since: February 2011
Authors: Sinem Cevik Uzgur, Yagiz Uzunonat, S. Fehmi Diltemiz, Melih Cemal Kushan, Rabia Gunay
Their excellent properties range from high temperature mechanical strength, toughness to resistance to degradation in oxidizing and corrosive environment.
The effects of alloying elements on microstructure, mechanical properties, thermal stability and processing characteristics of alloy are important factors.
In addition to that the modification on the content of Al and Ti developes the optimum mechanical properties of the alloy.
Another factor on the improvement of the mechanical properties and thermal stability is the addition of Co up to about 9 wt%.
Extensive studies demonstrated that this alloy has shown superior tensile and stress rupture properties to alloy 718 and comparable properties to Waspaloy at the temperature up to 704°C [11].
Online since: December 2008
Authors: Ian J. Davies, Kiyoshi Itatani, Hiroshi Suemasu
Mechanical and Thermal Properties of Silicon Carbide Composites with Chopped Si-Al-C Fiber Addition Kiyoshi Itatani1,a , Ian J.
The mechanical properties of SiC composites may, therefore, be expected to be enhanced when chopped SA fiber is incorporated into the SiC matrix.
On the basis of such information, the present paper describes the influence of SA fiber addition on the thermal and mechanical properties (e.g., thermal conductivity and fracture toughness) of SiC composites with chopped SA fiber addition; the effect of fiber orientation on the mechanical properties was also examined in this research.
Mechanical properties of SiC composites with SA fiber addition.
Thermal properties of SiC composites with SA fiber addition.
Online since: September 2013
Authors: Tomasz Dzitkowski, Andrzej Dymarek
Before the passive suppression of vibrations is commenced it is necessary to determine dynamic properties of the desired system in the form of characteristic functions that define the system mobility (mechanical admittance) or immobility (mechanical impedance) [1,2]
In this study the conditions for passive suppression of vibrations are determined as the values of factors specified by drop of the free vibration frequency.
In the above-presented case, the immobility (6) and mobility (7) take the analytic form taking into account solely the dynamical properties in the form of resonance and anti-resonance frequency sequence
Structure of mechanical system obtained as a result of applying the passive vibration reduction in the case of properties described in the forms (6), (7) Computer-aided numerical example The Synteza program is designed to determine a discrete mechanical system by taking into account the desired dynamical properties.
These requirements apply to obtaining the set dynamic properties of systems with control as characteristic functions (impedance, mobility).
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