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Online since: October 2014
Authors: Darja Kubečková, Michal Kraus, Veronika Kučeriková
The characteristic technological and chemical properties of plasters protect supporting structure against weather and temperature extremes.
The mechanical purification is based on the high-pressure stream of water or hot steam.
In the contrast, impregnation with a depot effect has also preventive properties. [1] The vegetation of algae can be partially avoided, mitigated or delay using by appropriate type and structure of the plaster or by the using biocides. [6] Biocides additives can be added to the plaster.
The possibilities of rehabilitation of facades, including an appropriate base layer. [1] Properties of Plaster affecting the Vegetation of Algae and Fungi The final layer of ETICS is mostly acrylic, silicate, silicone and mosaic plaster.
Diffusion resistance factor μ-value [-] is in the range from 20 to 120.
The mechanical purification is based on the high-pressure stream of water or hot steam.
In the contrast, impregnation with a depot effect has also preventive properties. [1] The vegetation of algae can be partially avoided, mitigated or delay using by appropriate type and structure of the plaster or by the using biocides. [6] Biocides additives can be added to the plaster.
The possibilities of rehabilitation of facades, including an appropriate base layer. [1] Properties of Plaster affecting the Vegetation of Algae and Fungi The final layer of ETICS is mostly acrylic, silicate, silicone and mosaic plaster.
Diffusion resistance factor μ-value [-] is in the range from 20 to 120.
Online since: November 2015
Authors: L. Mahesh Kumar, P. Jayaraman
., Mechanical Engineering, Prathyusha Institute of Technology and Management, Chennai, India
2 Professor, Mechanical Engineering, St.
Experimental Work Taguchi’s L9 orthogonal array was used to design the experiments with three factors and three levels.
The assignment of the levels to the factors and the various parameters used are given in Table 1.
Table 1 Assignment of the Levels to the Factors Sl.No Factors Unit Symbols Level 1 Level 2 Level 3 1 Cutting speed m/min v 91.84 128.58 165.32 2 Feed rate mm/rev f 0.05 0.075 0.1 3 Depth of cut mm d 0.1 0.15 0.2 Table 2 Experimental Results for L9 Orthogonal Array Trial No.
In the present work, it is revealed that depth of cut, feed rate is prominent factors which affect the turning of aluminium alloy.
Experimental Work Taguchi’s L9 orthogonal array was used to design the experiments with three factors and three levels.
The assignment of the levels to the factors and the various parameters used are given in Table 1.
Table 1 Assignment of the Levels to the Factors Sl.No Factors Unit Symbols Level 1 Level 2 Level 3 1 Cutting speed m/min v 91.84 128.58 165.32 2 Feed rate mm/rev f 0.05 0.075 0.1 3 Depth of cut mm d 0.1 0.15 0.2 Table 2 Experimental Results for L9 Orthogonal Array Trial No.
In the present work, it is revealed that depth of cut, feed rate is prominent factors which affect the turning of aluminium alloy.
Online since: September 2011
Authors: Kiyoshi Kemmochi, Jian Shi, Li Min Bao
Mechanical recycling involves breaking down CFRPs by shredding, crushing, milling, or other similar mechanical processes, but can produce only short milled fibers with poor mechanical properties used as filler or reinforcement materials [4].
Fluidized beds [6] can operate at high temperatures in an oxidizing atmosphere to produce clean, resin-free fibers, but cause a reduction in mechanical properties.
Mechanical Properties of Recycled CFs.
It is essential to investigate mechanical properties in-depth.
Temperature is the main factor affecting the tensile strength of recycled CFs.
Fluidized beds [6] can operate at high temperatures in an oxidizing atmosphere to produce clean, resin-free fibers, but cause a reduction in mechanical properties.
Mechanical Properties of Recycled CFs.
It is essential to investigate mechanical properties in-depth.
Temperature is the main factor affecting the tensile strength of recycled CFs.
Online since: September 2021
Authors: Anna S. Shorshina, Viktor A. Lomovskoy, Igor D. Simonov-Emelyanov, Anastasia A. Razzhivina
Introduction
It is known that epoxy resins (ES) and materials based on them are widely used in various areas of natural economy due to their valuable properties: low shrinkage during curing, high adhesion to various materials, chemical resistance, good physical and mechanical properties, and excellent dielectric properties [1].
The use of epoxy oligomers in the preparation of composites poses new challenges associated with the study of the relationship "structure-physicomechanical and physicochemical characteristics-synthesis of materials with desired properties."
It should be noted that the properties of the composition depend on the completeness of curing, which is determined by the amount and nature of the curing system [4].
However, the temperature dependence of the viscosity η = f (T) is a little determining factor affecting the targeted synthesis of a three-dimensional composite network.
Regulation of the properties of epoxy oligomers.
The use of epoxy oligomers in the preparation of composites poses new challenges associated with the study of the relationship "structure-physicomechanical and physicochemical characteristics-synthesis of materials with desired properties."
It should be noted that the properties of the composition depend on the completeness of curing, which is determined by the amount and nature of the curing system [4].
However, the temperature dependence of the viscosity η = f (T) is a little determining factor affecting the targeted synthesis of a three-dimensional composite network.
Regulation of the properties of epoxy oligomers.
Online since: May 2004
Authors: L. Magalhães, C. Sá, Henrique Santos, António Duarte, J. Seabra
Table 1 shows a list of the tested ADIs along with some correspondent mechanical properties.
Mechanical properties of all tested ADIs.
Damage intensity factor Fig. 3.
Title of Publication (to be inserted by the publisher) 279 Fig. 3 shows how measured ZAF diameters, here represented by respective As values, follow closely the evolution predicted by Paris law (correlation factors attain more than 99% in most cases).
Zones affected by fatigue revealed a coherent growth at each test.
Mechanical properties of all tested ADIs.
Damage intensity factor Fig. 3.
Title of Publication (to be inserted by the publisher) 279 Fig. 3 shows how measured ZAF diameters, here represented by respective As values, follow closely the evolution predicted by Paris law (correlation factors attain more than 99% in most cases).
Zones affected by fatigue revealed a coherent growth at each test.
Online since: July 2015
Authors: Jaafar Sahari, Hendra Suherman, Irmayani Irmayani
Composite that has electrical conductivity property known as conductive polymer composites (CPCs).
The electrical conductivity of the composite bipolar plate obtained was less than 6 S/cm, although the bipolar plate had excellent mechanical and gas barrier properties.
Although the moulding parameters are the important factors on the resulting high electrical conductivity of the CB/G/EP composite, the optimization of the moulding parameters has been given less attention in the literature, especially in fabrication CB/G/EP composite.
The moulding parameters such us moulding temperature (A), moulding pressure (B), and moulding time (C) were selected as control factors.
ANOVA results show that the most significant factor in affecting the electrical conductivity of the CB/G/EP composite was moulding time (C) with percentage contribution of 59.98%. 4.
The electrical conductivity of the composite bipolar plate obtained was less than 6 S/cm, although the bipolar plate had excellent mechanical and gas barrier properties.
Although the moulding parameters are the important factors on the resulting high electrical conductivity of the CB/G/EP composite, the optimization of the moulding parameters has been given less attention in the literature, especially in fabrication CB/G/EP composite.
The moulding parameters such us moulding temperature (A), moulding pressure (B), and moulding time (C) were selected as control factors.
ANOVA results show that the most significant factor in affecting the electrical conductivity of the CB/G/EP composite was moulding time (C) with percentage contribution of 59.98%. 4.
Online since: June 2013
Authors: Wei Hua Song, Hong Wei Zhang
Introduction
Coal and gas outburst is a very complicated dynamic phenomenon, which is affected by many factors such as in-situ stress, gas pressure, physical and mechanical properties of coal and rock.
Hanes believed that stress and gas are playing important roles in coal and gas outburst, but some factor is in dominant sometimes [1].
Geological structures in NW direction are performing for pressure and twist properties, which is mainly in extrusion, shearing functions.
Mechanics analysis of the causes for coal and gas outburst Coal and gas outburst is a kind of complex dynamic phenomenon, mainly affected by many factors such as in-situ stress, geological structures, gas pressure and physical and mechanical properties of coal and rock.
At the same time, the mechanics properties are also differences.
Hanes believed that stress and gas are playing important roles in coal and gas outburst, but some factor is in dominant sometimes [1].
Geological structures in NW direction are performing for pressure and twist properties, which is mainly in extrusion, shearing functions.
Mechanics analysis of the causes for coal and gas outburst Coal and gas outburst is a kind of complex dynamic phenomenon, mainly affected by many factors such as in-situ stress, geological structures, gas pressure and physical and mechanical properties of coal and rock.
At the same time, the mechanics properties are also differences.
Online since: August 2019
Authors: Anežka Zezulová, Dana Kubátová, Alexandra Rybová
Samples were cured under hydrothermal conditions up to 170 °C for 24h and changes in mechanical properties, phase composition and porosity were monitored.
It was confirmed, that hydrothermal treatment can lead to acceleration of chemical reaction and promising mechanical properties.
It was confirmed, that concentration and type of alkaline activator and higher temperature and pressure are factors that have an influence on formation of crystalline phases [16].
The mechanical properties of the prepared samples were monitored.
Mechanical properties are affected by the change in phase composition, the formation of the aluminosilicates and the character and volume of pores associated with excess of water during hydrothermal treatment.
It was confirmed, that hydrothermal treatment can lead to acceleration of chemical reaction and promising mechanical properties.
It was confirmed, that concentration and type of alkaline activator and higher temperature and pressure are factors that have an influence on formation of crystalline phases [16].
The mechanical properties of the prepared samples were monitored.
Mechanical properties are affected by the change in phase composition, the formation of the aluminosilicates and the character and volume of pores associated with excess of water during hydrothermal treatment.
Online since: July 2014
Authors: Lin Li, Chang Ji Shan, Yi Duo Bian
There are many factors affecting the structure of the shaft and its structure varies from the specific circumstances.
Take, and you will get the shaft stress: (10) Of which, —the working stress on the section; —the synthetic bending moment on the section; T—the torque on the section;—the correction factor set by the changing properties of the torsional stress.
According to the Mechanical Design Manual [6], is found
The PRO / E three-dimensional modeling software can be applied to assembly designing, overall weight calculation, surface area and other exterior factors, which will help improve the design accuracy and efficiency References [1] Zhao, Ying-yue: Hydraulic motor[M], Shanghai Jiao Tong University Press, 2000, p:20-25
[6] Cheng, Da-xian: Mechanical Design Manual, Vol.5 [M], Chemical Industry Press, 2008,p:67-99
Take, and you will get the shaft stress: (10) Of which, —the working stress on the section; —the synthetic bending moment on the section; T—the torque on the section;—the correction factor set by the changing properties of the torsional stress.
According to the Mechanical Design Manual [6], is found
The PRO / E three-dimensional modeling software can be applied to assembly designing, overall weight calculation, surface area and other exterior factors, which will help improve the design accuracy and efficiency References [1] Zhao, Ying-yue: Hydraulic motor[M], Shanghai Jiao Tong University Press, 2000, p:20-25
[6] Cheng, Da-xian: Mechanical Design Manual, Vol.5 [M], Chemical Industry Press, 2008,p:67-99
Online since: June 2020
Authors: J.B. Saedon, Nornisaadila Musa, M.S. Adenan
Ti-6Al-4V has wide range of application in alloys due to its superior mechanical properties such as corrosion resistance, high tensile strength and toughness.
The variations of the parameters affecting the cutting quality concludes the surface integrity [14].
Table 2: Control factors of WEDM Parameter Unit Test I Test II Pulse-off time µs 1 5 Peak current Ampere 4 6 Wire tension N 6 16 Wire feed mm/min 4 12 Surface Characterization.
Copper increases the hardness of titanium and the existence of zinc has no effects on the mechanical properties.
Weaver, “Crystallography, Compositions, and Properties of White Layer by Wire Electrical Discharge Machining of Nitinol Shape Memory Alloy,” Mater.
The variations of the parameters affecting the cutting quality concludes the surface integrity [14].
Table 2: Control factors of WEDM Parameter Unit Test I Test II Pulse-off time µs 1 5 Peak current Ampere 4 6 Wire tension N 6 16 Wire feed mm/min 4 12 Surface Characterization.
Copper increases the hardness of titanium and the existence of zinc has no effects on the mechanical properties.
Weaver, “Crystallography, Compositions, and Properties of White Layer by Wire Electrical Discharge Machining of Nitinol Shape Memory Alloy,” Mater.