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Online since: April 2024
Authors: Dmitry V. Ardashev, Ramil Dadashov, Sergey Gandzha, Nikolay Neustroev, Andrey Sogrin, Denis Korobatov
The calculations took into account the following phenomena: the nonlinear magnetic properties of ferromagnets and their magnetic saturation, eddy current losses in massive electrically conductive parts [12–14], and the mechanical transient processes associated with the inertia of the armature and the connected spool.
The electromagnetic force directly affects the EMC speed.
Reduction of the System Inductance The EMC dynamic properties can be improved by reducing inductance.
The geometric model of the EMC was transformed to be compatible with the software product and supplemented with housing parts and information on the thermal properties of the materials of its constituent parts [15].
The anisotropy of thermal properties was neglected. 40 °C air temperature was set as the environment.
Online since: February 2019
Authors: O.N. Tulupov, Alexandr Sychkov, Alexandr Moller
All these factors result in increasing of the welding wire manufacturing process effectiveness.
The limitation of boron and nitrogen content, hence their content ratio, is explained by their affect on steel properties.
Chujko, Structure and properties of the rod for electrode and welding wire manufacturing, Poligraphist, Bendery, 2009
Habibulin et al., Analysis of effect of end-of-rolling temperature on wire microstructure and mechanical properties.
Kamalova, Effect of metallurgical factors and heat treatment on welding rod structure formation, Vestnik of Nosov Magnitogorsk State Technical University. 14(3) (2016) 55-70
Online since: May 2011
Authors: Lin Li, Jing Da, Zhao Yang Ding, Zhi Tong Sui, Qing Wang
Erosion damage of concrete is considered as one of the four factors that caused the failure of concrete material[1,2,3].
It is because the polymerization reacted completely in the geopolymer matrix and formed compact three-dimensional network structure which made the samples hard to erode and performed excellent sulfate resistance property[8,9].
Low-calcium fly ash-based geopolymer concrete: long-term properties. 2006
[10] M.Luz Granizo,M.T.Blanco-Varela,S.Martı´nez-Ramı´rez.Alkali activation of metakaolins: parameters affecting mechanical, structural and microstructural properties[J].
Online since: May 2011
Authors: Shang Chuan Zhao, Jing Liang Xia
Concrete is compound body consisting of solid, liquid and gas, whose durability is affected by many factors, such as environment, loads and itself materials[1].
Cleanliness indexes mainly impact the interface bonding between coarse aggregate and cement mortar, thus affecting the erosion rate of corrosive media, which include powder adsorption on coarse aggregate surface and clay content.
The greater the clay content is the more weakening of interface properties is.
Zhou and Barr B.I.G: Fracture properties of high-strength concrete with varying silca fume content and aggregates.
Properties of Fresh Concrete, Edited by H.J.Wierig,1990 [5] A.
Online since: September 2011
Authors: Luigino Filice, Francesco Gagliardi, I. Alfaro, Elías Cueto
However, mechanical properties as well as the application field of the manufactured parts can be increased using embedding reinforcement or functional wires in extruded profiles [3].
The effective stress, the pressure and the time that the material requires to cross the welding chamber are the factors usually monitored to predict the quality of welding line [9, 10].
On the other hand, in FE simulations, the obtained results can be deeply affected by remeshing.
The die dimensions, whose changes can significantly affect the goodness of the extruded part, are illustrated in Fig. 1; their values are reported in Table 1.
In detail, the constant shear model was used; here, the frictional stress is defined by τ =mk where k is the shear yield stress and m, fixed to 1, is the friction factor.
Online since: January 2017
Authors: Quan Jiang, Shi Wei Ren, Yi Liu, Chun Zhi Zhao
In this context, all the manufacturing enterprises have been actively developing new techniques to produce new type aluminum-plastic composite panels, and have significantly improved the fireproof and flame-retardant properties of the products on the basis of ensuring all the performance levels of the products being acceptable.
Taking comprehensive consideration of such factors as development status of domestic products and coordination with international advanced standards, the Author deems it necessary to revise the test methods of nitric acid resistance so as to adjust to the requirements of more coating systems
(2) Roll peel strength is an important indicator to reflect the bonding performance of metal base and core material and is under influence of many factors such as raw materials and compound processes.
It is suggested that the enterprises, when engaging in the research and development of new type flame-retardant aluminum-plastic composite panel, give consideration to the mechanical property change of products, the study to the appropriate proportion of low density polyethylene and inorganic substances (metal hydroxide/metal oxide) is critical to consider both mechanical property and burning behavior indicator of products
It can be concluded that flame retardant level of core material is the decisive factor for the burning behavior of aluminum-plastic composite panel, while the most critical factor to affect flame retardant level of core material is the heat of combustion of core material.
Online since: July 2014
Authors: Hui Nong He, Zhang Wei Chen, Qiang Li Luan, Yu Chen
The control technology is based on the FRF estimation, whose accuracy affects the rapidity and stability of the control process.
FRF measurement is one of the factors that affect control effects, and system error is mainly from input and output measurement, such as noise interference and signal processing, such as leakage error.
Conclusions The precision of FRF estimation is one of the significant factors that affect multi-axis random tests control.
Dynamic Property of A Shaking Table Simulation Earthquake in Chinese.
Proceedings of the Institution of Mechanical Engineers, Part I:Journal of Systems and Control Engineering.Vol. 221(2007), p.423-444
Online since: October 2011
Authors: Mohammad K. Alkam, P. Barry Butler
The theoretical CJ point properties of the present mixture have been computed using RGEQUIL, an equilibrium code developed by Butler and Schmitt [19].
The second issue is the metallurgical limit of the substrate material as overheating the surface of the substrate could drastically affect its mechanical properties.
This surface is imaginary, passive and does not affect the flow conditions.
Results of the present investigation show that the flow properties at the exit of the tube are insensitive to the substrate existence at a stand-off distance of 20 mm.
An imaginary and passive circular surface with one tube diameter is place 1 mm ahead of the substrate in order to monitor properties of the gas flow heading for the substrate.
Online since: February 2013
Authors: Yue Feng, Mei Xia Qiao, Jie Wang, Mei Qi Liu
To carry out the simulation experiment, the results show that the proposed controller can guarantee that the system has better dynamic and static properties, error convergence rate is greatly improved.
In order to achieve the Potter diagram frequency, that in the middle and low frequency zero phase shift zero gain, high frequency amplitude fast decay, restrain the resonance peak value, reaching zero phase shift effect, system uses Notch functions and two order low pass filter superimposed structure , the Notch function expression for: The Notch function has periodic notch characteristics, its specific frequency attenuation rate is far greater than the 2 order filter, and on the adjacent frequency gain affects less than 2 order filter, if the coefficient is appropriate, the function also has a zero phase shift characteristic.
In the middle and low band gain of 0, the phase difference is zero, so that the system has better stability and convergence; High frequency phase difference is existent, but high frequency signal attenuation is very large, does not affect system performance.
After system input rectifier, using unidirectional half-bridge inverter output structure, power tube using IGBT, switching frequency 20kHz, ignore rectifying filtering, inverse peak voltage network so that can absorption secondary factors, system parameters as the input AC voltage 220V.
Chinese Journal of Mechanical Engineering.vol. 2, pp. 134-136, February 2002
Online since: July 2024
Authors: Mostafa Abdellah Sayed, Mona Mohamed Wetwet, Safaa M.A. El-Gamal, Mohamed Ramadan, Alaa Mohsen, Mahmoud M. Hazem, Fatma Mostafa Helmy
There are several works that investigated the impact of nanoparticles on these properties.
The addition of WO3 to cement and slag can have a significant effect on their fresh properties.
Sayed et al. were able to enhance the mechanical properties of slag/homra-based geopolymer after adding 0.25 wt.% WO3 by 52.4% [15].
Setting time of cementitious pastes Setting time determination is one of the most pressing physical factors that should be observed in the casting of any cementitious material to handle in which application they are applicable.
Ramadan, Thermal resistance, microstructure and mechanical properties of type I Portland cement pastes containing low-cost nanoparticles, Journal of Thermal Analysis and Calorimetry, 131 (2018) 949-968
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