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Online since: September 2014
Authors: Adam Skrobak, Martin Reznicek, Vojtech Senkerik, Martin Ovsik, David Manas, Michal Stanek, Petr Kratky
One of the factors that can negatively affect this interpretation is the number of tested samples.
This material belong to category of construction materials and is known for its good mechanical properties, as in statically and dynamically stressed parts.
Good sliding properties, high abrasion resistance and good damping properties make it one of the most widely used construction material.
Radiation crosslinking is used for standard and construction materials, to which this processing gives properties of high-tech materials.
Even though the difference can be seen by the naked eye, the effect of irradiation on creep properties can be affected by subjective impression of the observer.
Online since: September 2015
Authors: Tomáš Bittner, Petr Bouška, Milan Rydval, Michaela Kostelecká, Miroslav Vokáč, Šárka Nenadálová
The type of disruption and the location of the disruption of the samples are important monitored factors.
properties of nonconventional reinforcements using a specially designed deformation sensor and the testing process are described in this contribution.
The determined tensile strength of the basalt reinforcement is higher than it could be expected because of basic properties of basalt.
The basalt fibers seem to be more suitable for using as reinforcement elements for UHPC matrix from the point of view of not only the determined mechanical properties but also because of the fact that the basalt fibers are in average about approximately 30 % cheaper than AR-Glass.
[2] ČSN EN ISO 13934-2 Textiles – Tensile properties of fabrics – Part 2: Determination of maximum force at maximum force using the grab method
Online since: May 2020
Authors: Alexander N. Bolotov, Vladislav V. Novikov, Olga O. Novikova
Permanent magnets with a high thermal resistance of properties of the SmCo5 alloy created a magnetic field on a friction path.
The device described in [15] has been developed and manufactured to study colloidal stability of magnetic fluids and oils in inhomogeneous magnetic fields, as well as to study the factors affecting structural stability of magnetic liquid media.
In order to check how this fact affects the work function, we made surface measurements of construction materials, which are different in mechanical and magnetic properties, coated with a thin (10 µm) layer of magnetic or non-magnetic oil.
However, it is also unacceptable to absolutize any of them, since the degree of their influence depends on a combination of many factors determined by friction conditions.
Mishchak, Tribological properties of ferrofluid, Friction and Wear, 27, 3 (2006) 330-336
Online since: October 2016
Authors: Wen Long Song, Guang Li Zhang, Hong Shi Bi, Gang Zhao, Zhuang Zhi Sun
As a result, we found it presented various electromechanical properties under the preparation factors of the different additive glycerol (0mL, 2mL, 4mL).
Results and Discussion As can be shown in Figure 3, the content of additive can affect the film properties.
Electrochemical properties and actuation mechanisms of actuators using carbon nanotube-ionic liquid gel.
Effect of solvent mixture on properties and performance of electro-active paper made with regenerated cellulose.
Investigation into the actuating properties of ionic polymer metal composites using various electrolytes.
Online since: September 2013
Authors: Jong Deok Kim, Young Moo Heo, Si Tae Won
Eco-Al is the new material which is replaced Mg of aluminum alloy with Mg+Al2Ca, therefore Eco-Al material has improved mechanical properties and formability.
The clearance between the punch and die of a fine blanking tool is an important design factor that affects the sheared surface of a product.
Especially, researches on weight reduction of automobiles wherein strength of components and functional factors are satisfied while weight is decreased are very active.
Table 1 shows its mechanical properties.
Lee, Microstructure and Mechanical Properties of Eco-2024-T3 aluminum alloy, Advanced Materials Research Vols. 602-604 (2013) p. 623-626 [2] W.
Online since: December 2014
Authors: Fan Guo Meng, Ben Liang Yu, Jun Fei Wu, Jin Mei Kan
Effect of Medium Viscosity on the Lift Performance of Full-metal Single Screw Pump Junfei WU1, a, Jinmei KAN1,b,Fanguo Meng1,c ,Benliang YU1,d 1College of Electromechanical Engineering,Qingdao University of Science and Technology Qingdao 266061,China ajfw_2002@sina.com, b694157316@qq.com, c813991893@qq.com,dyubenliang@sina.com Keywords:full-metal single screw pump;viscosity; performance ;numerical simulation;fluid dynamics Abstract: To deal with the complicated spiral surface of screw pump,this article uses Pro/E to build geometry model.And it improves the method of the grid topology to use the dynamic grid ideas.At the same time,using the method of Computational Fluid Dynamics to numerical simulation for full-metal single screw pump,analysis and study that viscosity affect leakage properties,the torque of surface of rotor and the volumetric efficiency.
Introduction The main performance parameters of full-metal single screw pump are volume flow, pressure of import and export,screw speed, the input power, medium viscosity and temperature, etc.Flow is Mutual influenced by many factors.Viscosity of the medium is affected by the temperature of the medium.The leakage of the pump is a function of the parameters.Designing the parameters of the pump must comprehensively consider the effect of these parameters.The field test research in the aspect of full-metal single screw pump performance needs higher economic costs, and the numerical simulation method shows its efficiency and simplicity.This article using the method of Computational Fluid Dynamics to numerical simulation for full-metal single screw pump,analyzes and studies that viscosity affect leakage properties,the torque of surface of rotor and the volumetric efficiency. 1 Modeling and Meshing We use Pro/E to establish geometric model of GLB500 type full-metal single screw pump and computational
Fig.1 Screw pump assembly schemes 2 The applied load and the analysis of the results 2.1 Viscosity affecting the performance of leakage Viscosity is one of the important factors which affect the efficiency of full-metal single screw pump.
Master thesis, Department of mechanical and mechatronic engineering.
Online since: September 2013
Authors: Tian Feng Gu, Jia Ding Wang
Factors affecting loess liquefaction caused by earth microtremors 4.1 c and values of loess Now let us analyze Coulomb’s Law (2) We can find that c and c and values are respectively measurable parameters of the friction and clay bridges among particles from formula(2).We wanted to know how c and values of loess vary after loess is soaked by water.
Collapse is due to contributory factors such as water soaking,self-load pressure and dynamic load and to built-in internal factors such as large pores and chemical,mineral and moisture contents.
Dynamic load caused earth microtremors is the most important of these factors.
,and Yao, M.,1997,Mechanical Properties of Loose Liquefied Sand Undergoing Lateral Flow: Proceedings of the International Symposium do Landslide Hazard Assessment, Xian,China,PP.57-74
In Genesis and Properties of Collapsible Soils: kluwer Academic Publishers Group, Dordrecht, pp. 267-293
Online since: January 2012
Authors: Yan Li Song, Lin Hua
Moreover, the evaluation of welding residual stress and strain affecting the formability of TWBs has not been reported previously.
In order to measure the mechanical properties of base sheets, uniaxial tension tests were performed on a Zwick Z100 material testing machine.
The measured hardening curves are shown in Fig. 2.The measured properties of the base materials are listed in Table 1.
Table 1 Plastic properties of the base sheets.
The evaluation of welding residual strain and stress affecting the TWB formability was conducted by comparing the simulated and experimental results of the Erichsen cupping tests.
Online since: November 2011
Authors: Zheng Zhang, Huan Ping Kong, Li Fei Li
Factors influencing acousto-ultrasonic approach to impact damage in composite materials Huanping Kong1,a , Zheng Zhang1,b,Lifei Li1,c 1School of Materials Science and Engineering, Beihang University, Beijing 100191, China akhp8706@126.com, bzhangzh@buaa.edu.cn, ctihutihu@163.com Keywords: Acousto-ultrasonic; impact damage; influencing factors; composite Abstract: This paper studied factors influencing AU detection results on different damage specimens, including simulation frequency, transducer modes and transducer location.
The propagation of emitted waves in the materials is affected by the characteristics of microstructure [3].
Reception signal is a rich source of information that carries the integrated imprint of material properties, microstructure and diffuse populations of flaws.
Through statistic analysis on reception signal, we can obtain effective information. 2 Theory and Background 2.1 Stress wave factors The basic approach of AU signal analysis was termed stress wave factor (SWF) analysis.
Mechanical Systems and Signal Processing [9] Z.Q.
Online since: February 2012
Authors: Zhen Long Wang, Yu Kui Wang, Bao Cheng Xie, Wan Sheng Zhao
Using this model, numerical simulation of the single spark of EDM process has been carried out with parameters such as conduction, convection, the latent heat of phase change, thermal properties of material with temperature and gauss distribution of heat flux to predict the temperature distribution in the discharge point of cathode as a result of single discharges in EDM process.
ANSYS version 12.0 has been used to develop a numerical model of the EDM process, and the model considered the important factors of the EDM process such as conduction, convection, the latent heat of phase change, thermal properties of material with temperature and gauss distribution of heat flux to analyze the temperature distribution of cathode electrode.
Important factors which contribute to the accurate calculation of temperature distribution of affected zone in single spark EDM process includes the amount of heat input, radius of plasma spark ,the fraction of energy distribution and the thermo-physical properties of material.
In the beginning of discharge, the temperature of heat-affected zone is low as shown in figure5.
With time increasing, the temperature of heat-affected zone enhances to the boiling and vaporization point, and the heat-affected in the vertical direction is smaller than that in the radial direction.
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