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Online since: November 2022
Authors: Ram Subbiah, Sampath Boopathi, M. Jeyakumar, M. Sureshkumar, R. Sanjeev Kumar
The damping and mechanical properties of oil palm and jute fiber epoxy product were investigated by varying fiber contents.
Dynamic mechanical properties (damping factor, loss and storage modulus) have been improved by increasing fiber content and hybridization with epoxy resin [22].
The influence of various operating factors on the drilling operations of NFRPC has been discussed in numerous research activities.
These factors have been affected by drilling speed, Feed rate, the diameter of the drill bit, and drill angle [40].
The jute fiber had been recommended in many research activities to obtain good mechanical properties and thermal stability
Dynamic mechanical properties (damping factor, loss and storage modulus) have been improved by increasing fiber content and hybridization with epoxy resin [22].
The influence of various operating factors on the drilling operations of NFRPC has been discussed in numerous research activities.
These factors have been affected by drilling speed, Feed rate, the diameter of the drill bit, and drill angle [40].
The jute fiber had been recommended in many research activities to obtain good mechanical properties and thermal stability
Online since: August 2019
Authors: Tatiana Furs, Ada Matkova, Vasyl Shvabyuk, Volodymyr Shvabyuk
Factors affecting the intensity of PbI2 nucleation centers formation from vapor phase remain unknown.
Depending on the influence of each of the listed factors, variety of growth forms of crystals from structurally perfect tapes, plates to bulk crystals of atypical form [7] is observed.
Consequently, considering the negative factors of the impurities influence on the crystallization process and lead iodide properties, in the work is suggested to conduct additional purification of the source components (Pb і І2), and then consistently carry out direct synthesis processes and crystal growth.
This complicates the growth process and negatively affects the homogeneity, structure and properties of the obtained material.
Lyskovich, Wide-band layered crystals and their physical properties, High School.
Depending on the influence of each of the listed factors, variety of growth forms of crystals from structurally perfect tapes, plates to bulk crystals of atypical form [7] is observed.
Consequently, considering the negative factors of the impurities influence on the crystallization process and lead iodide properties, in the work is suggested to conduct additional purification of the source components (Pb і І2), and then consistently carry out direct synthesis processes and crystal growth.
This complicates the growth process and negatively affects the homogeneity, structure and properties of the obtained material.
Lyskovich, Wide-band layered crystals and their physical properties, High School.
Online since: November 2013
Authors: Mahmood Khaloobagheri, Behzad Janipour, Nayereh Askari
Due to low mechanical properties, a highly conductive pure copper needs to be strengthened and new materials with superior characteristics have been developed.
It has been reported that with a small fraction of nano-sized reinforcements, MMNCs could obtain comparable or even far superior mechanical properties than MMCs.
In this study, the main aim is to improve high-temperature mechanical properties of ductile copper while keeping its electrical conductivity at a reasonable level.
For achieving optimized mechanical and electrical properties of the composite materials, it is significant to obtain uniform distribution of reinforcement in the matrix.
If reinforcement particles in the composites do not disperse uniformly, this affects mechanical and electrical properties of composites negatively [9].
It has been reported that with a small fraction of nano-sized reinforcements, MMNCs could obtain comparable or even far superior mechanical properties than MMCs.
In this study, the main aim is to improve high-temperature mechanical properties of ductile copper while keeping its electrical conductivity at a reasonable level.
For achieving optimized mechanical and electrical properties of the composite materials, it is significant to obtain uniform distribution of reinforcement in the matrix.
If reinforcement particles in the composites do not disperse uniformly, this affects mechanical and electrical properties of composites negatively [9].
Online since: May 2012
Authors: Hui Ma, Guo Hua Liang, Su Zhi Liang, Hong Ying Liu
Research on Mode Selection and Layout of Parking in the New Residential Quarter
Hui Ma 1,2,a,Guo hua Liang 1,b Suzhi Liang 1,c Hongying Liu 3,d
1 School of Highway,Chang’an University,Xi’an ,710064,ShanXi ,China
2 Xi'an Institute of Urban Planning and Design,Xi’an,650031, ShanXi ,China
3Weifang Planning Bureau, Wei fang, China ,261041
a20493171@qq.com, b lgh@chd.edu.cn, c826212986@qq.com, dfuhuiping11@sina.com
Key words: traffic engineering; new residential quarter; parking mode; layout of parking; parking spaces
Abstract: In order to make new residential quarters’ parking mode selection and layout become more rational which can response to the parking pressure bring by the growing private car to the residential quarter.By analyzing the factors of affecting parking model and characteristics of parking demand, studying on the characteristics and applicability of various parking models, derive the method of parking mode selection and allocation according to parking land use.
Analysis of selection of parking mode in the new residential quarter Analysis of influence factor of parking mode in the new residential quarter Selection of parking mode is mainly influenced by the residential properties in the residential area, for example, residential floor area ratio, residential grade, residential area position condition, house type and structure in residential district, habitant age level, regional economical development standard and other factors[3], which are inseparable from the residential area parking.
In conclusion, comprehensive consideration shall be made for the matching degree between various kinds of parking modes and residential properties of residential quarter, in case of selection of parking mode.
Method for selection of parking mode in residential quarter Type and characteristic of parking mode in residential quarter The parking mode consists mainly of ground parking, underground parking and mechanical three dimension parking on the basis of comprehensive consideration of influence factor of the parking mode and of the concrete anamnesis of the parking demand characteristic.
Central Greenland underground parking Mechanical three dimension parking Mechanical parking Small land occupation and strong adaptability to terrain, maximum space utilization rate, high security for vehicle storage and convenience in assembly and disassembly.
Analysis of selection of parking mode in the new residential quarter Analysis of influence factor of parking mode in the new residential quarter Selection of parking mode is mainly influenced by the residential properties in the residential area, for example, residential floor area ratio, residential grade, residential area position condition, house type and structure in residential district, habitant age level, regional economical development standard and other factors[3], which are inseparable from the residential area parking.
In conclusion, comprehensive consideration shall be made for the matching degree between various kinds of parking modes and residential properties of residential quarter, in case of selection of parking mode.
Method for selection of parking mode in residential quarter Type and characteristic of parking mode in residential quarter The parking mode consists mainly of ground parking, underground parking and mechanical three dimension parking on the basis of comprehensive consideration of influence factor of the parking mode and of the concrete anamnesis of the parking demand characteristic.
Central Greenland underground parking Mechanical three dimension parking Mechanical parking Small land occupation and strong adaptability to terrain, maximum space utilization rate, high security for vehicle storage and convenience in assembly and disassembly.
Online since: October 2011
Authors: Jun Hong Lin, Ya Yin Lin, Yu Hsuan Chen
The initial pH is the important factor of medium to affect the BC production.
The characteristics of BC are high cellulose purity, great mechanical strength, high water keeping property and consisted of nano structure could be applied in industry [2] and medicotechnology [3].
The production of BC could be affected by several factors, such as G. xylinus strains, cultivation time, temperatures, pH values and medium types [4].
Factors, levels and the orthogonal array.
For getting the maximum effect, the initial pH, glucose concentration, acetic acid concentration, medium volume and vessel basal area which are the most influential factors were adjusted to affect the BC pellicle production.
The characteristics of BC are high cellulose purity, great mechanical strength, high water keeping property and consisted of nano structure could be applied in industry [2] and medicotechnology [3].
The production of BC could be affected by several factors, such as G. xylinus strains, cultivation time, temperatures, pH values and medium types [4].
Factors, levels and the orthogonal array.
For getting the maximum effect, the initial pH, glucose concentration, acetic acid concentration, medium volume and vessel basal area which are the most influential factors were adjusted to affect the BC pellicle production.
Online since: March 2015
Authors: Anatoly Danilov, Alexander Razov
Basic thermo-mechanical properties of NiTi alloys at high rate straining and their functional properties acquired after high rate tensile.
Improving the functional properties of NiTi.
The existence of distinct areas of austenite in the aged NiTi alloys, which are characterized by distinct paths of martensitic transformation, points to distinctions in the behaviour of their anisotropy factors A=c44/c¢ in the vicinity of the Ms temperature.
Volkov, Mechanical properties of titanium nickelide at high strain rate loading, Materials Science and Engineering A 378 (2004) 122-124
Harding (Eds.), Mechanical Properties at High Rates of Strain, Institute of physics, London, 1980, pp. 201-214
Improving the functional properties of NiTi.
The existence of distinct areas of austenite in the aged NiTi alloys, which are characterized by distinct paths of martensitic transformation, points to distinctions in the behaviour of their anisotropy factors A=c44/c¢ in the vicinity of the Ms temperature.
Volkov, Mechanical properties of titanium nickelide at high strain rate loading, Materials Science and Engineering A 378 (2004) 122-124
Harding (Eds.), Mechanical Properties at High Rates of Strain, Institute of physics, London, 1980, pp. 201-214
Online since: June 2021
Authors: Lei Qin, Hao Ran Duan, Feng Jiao Shi, Peng Zhao
Due to design problems, material quality problems, human factors, construction quality and other factors may cause leakage of the structure, seriously affecting the bearing capacity of the structure, resulting in engineering accidents[4, 5].
Meanwhile, its mechanical properties are better than that of water glass grouting material, and it is more suitable for coal mine grouting.
Xu, Experimental Study on Properties of Cement-Clay-Slag Grouting Material[D].
Zhang, et al, Effects of nano-clay on the mechanical and microstructural properties of cement-based grouting material in sodium chloride solution[J].
Du, Mechanical properties of the carbon nanotubes enhanced cement-based grouts and the microscopic mechanism[D].
Meanwhile, its mechanical properties are better than that of water glass grouting material, and it is more suitable for coal mine grouting.
Xu, Experimental Study on Properties of Cement-Clay-Slag Grouting Material[D].
Zhang, et al, Effects of nano-clay on the mechanical and microstructural properties of cement-based grouting material in sodium chloride solution[J].
Du, Mechanical properties of the carbon nanotubes enhanced cement-based grouts and the microscopic mechanism[D].
Online since: April 2015
Authors: S.M. Emelyanenko, Natalya Saprykina, Alexandr Saprykin
Fabrication of functional components of desired physico-mechanical characteristics by layer-by-layer laser sintering is a widely studied problem in the world now.
Such a mathematical model has been developed taking into account the results of four-factor design experiment.
Comparing experimental data and obtained by the formula 1, we conclude that the radiation power, the speed of movement of the laser beam and the scanning step are the main parameters affecting the surface roughness of the surface of the sintered layer, but the temperature of heating the powder material must necessarily be included in the model of governance.
Therefore, the radiation power and speed of the laser beam are the main parameters affecting the thickness of the sintered layer, but the temperature of the heating step and the powder material must necessarily be included in the model of control.
A controlled modification of the properties of the sintered surface layer by dividing the processing modes into a semifinishing mode for the surface and a rough mode for the bulk is discussed, which makes it possible to increase the efficiency of the sintering process without the quality loss of the product surface.
Such a mathematical model has been developed taking into account the results of four-factor design experiment.
Comparing experimental data and obtained by the formula 1, we conclude that the radiation power, the speed of movement of the laser beam and the scanning step are the main parameters affecting the surface roughness of the surface of the sintered layer, but the temperature of heating the powder material must necessarily be included in the model of governance.
Therefore, the radiation power and speed of the laser beam are the main parameters affecting the thickness of the sintered layer, but the temperature of the heating step and the powder material must necessarily be included in the model of control.
A controlled modification of the properties of the sintered surface layer by dividing the processing modes into a semifinishing mode for the surface and a rough mode for the bulk is discussed, which makes it possible to increase the efficiency of the sintering process without the quality loss of the product surface.
Online since: March 2018
Authors: Vasyl Lozynskyi, Pavlo Saik, Mykhailo Petlovanyi, Kateryna Sai, Yevhenii Malanchuk
Introduction
The rock massif is characterized with a high level of structural and textural heterogeneities and physico-mechanical nonstatic properties.
The initial state of rock massif stress largely depends on the stratification depth and mechanical properties of rocks.
Сhange of physico-mechanical rocks and coal properties, gases redistribution, variation of stress are observed in the faulting zones under the influence of tectonic processes.
The stress changes, which are accompanied in accordance with the properties of entire media deformation, depend on the level of initial pressure, the parameters of the voids and the deformation properties of the rock massif.
It is quite difficult to take into account changes in time over a large number of factors that affect the stress field.
The initial state of rock massif stress largely depends on the stratification depth and mechanical properties of rocks.
Сhange of physico-mechanical rocks and coal properties, gases redistribution, variation of stress are observed in the faulting zones under the influence of tectonic processes.
The stress changes, which are accompanied in accordance with the properties of entire media deformation, depend on the level of initial pressure, the parameters of the voids and the deformation properties of the rock massif.
It is quite difficult to take into account changes in time over a large number of factors that affect the stress field.
Online since: July 2022
Authors: Giovanna Rotella, Luigino Filice, Maria Rosaria Saffioti, Michela Sanguedolce, Domenico Umbrello
In fact, in the biomedical field, it continues to be one of the most used materials in prostheses thanks to its good corrosion resistance, high biocompatibility and its reliable mechanical properties as a replacement for hard tissues [4].
Properties changes by surface modification can be induced through different kinds of processing, such as: i) mechanical, e.g. burnishing, sandblasting and grinding processes; ii) physical, through plasma and laser treatments; iii) chemical, using acid and/or alkaline solutions.
The tribocorrosion behaviour of a material depends on the properties of the involved mating materials, on the mechanics of the tribological contact and is affected by the physico-chemical properties of the working environment.
Some limitations of this study concern the introduction of possible interference factors during the tests: i) related to interruptions of the tests in order to perform measurements, which could in part affect the results ii) the employment of simulated body fluid, which can only in part represent working conditions in body environment, iii) the analysis of one set of testing parameters.
Bayer, Mechanical Wear: Fundamentals and Testing, Second edi, Marcel Dekker, Inc., New York (USA), 2004.
Properties changes by surface modification can be induced through different kinds of processing, such as: i) mechanical, e.g. burnishing, sandblasting and grinding processes; ii) physical, through plasma and laser treatments; iii) chemical, using acid and/or alkaline solutions.
The tribocorrosion behaviour of a material depends on the properties of the involved mating materials, on the mechanics of the tribological contact and is affected by the physico-chemical properties of the working environment.
Some limitations of this study concern the introduction of possible interference factors during the tests: i) related to interruptions of the tests in order to perform measurements, which could in part affect the results ii) the employment of simulated body fluid, which can only in part represent working conditions in body environment, iii) the analysis of one set of testing parameters.
Bayer, Mechanical Wear: Fundamentals and Testing, Second edi, Marcel Dekker, Inc., New York (USA), 2004.