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Online since: January 2010
Authors: Dattatraya P. Dandekar
The mechanical behavior of ceramics under high pressures and temperatures is a subject of considerable interest.
Since high pressures can be generated under static or dynamic conditions, it is necessary to measure mechanical properties of the materials under both.
Material The relevant properties of titanium diboride, densities, bulk modulus and pressure derivative of the bulk modulus, and Hugoniot Elastic Limit (HEL), used in various investigations are displayed in Table 1.
A possible reason for this discrepancy is that the large magnitude of the Hugoniot Elastic Limit (HEL) of titanium diboride, i.e., 12-17 GPa, affected the Table 1 Properties of titanium diboride.
The results of such experiments would improve our current understanding of the shear strength of a solid under high pressures and determine the effects of factors mentioned above which may explain the differences in the values of shear strength obtained form shock compression and static compression experiments..
Online since: April 2019
Authors: Suteera Witayakran, Jatuporn Kongcrup, Phichit Somboon, Chaiyaporn Sampoompuang, Keowpetch Lobyam
Paper mechanical properties, including density, tensile index, burst index, ring crush index, and tear index, were tested according to ISO 5270.
Analysis of Paper Mechanical Properties.
Results and Discussion Mechanical Properties of Activated Carbon Loaded Paper.
This effects also correlated to mechanical properties of the AC-paper because the most important factor that affects paper mechanical properties is inter-fiber bonding.
Mechanical properties of AC-paper.
Online since: July 2011
Authors: Tian Dong Xia, Yang Tao Xu, Wen Jun Zhao, Xiao Jun Wang
W and Mo in Cobalt-base superalloys provide additional strength to the matrix[5].The future study should elucidate the precise mechanism by which Co3(Al,Ti) phase forms and its effect on the properties, which may be very useful to design new Co-base two-phase superalloys[6].
Therefore, It is necessary to research welding properties of Co-9Al-7.5W on 304 austenite stainless steel by laser cladding.
This paper focus on investigated the cladding properties of Co-9Al-7.5W powder on 304 stainless steel by laser cladding.
Various factors decided the quality of caldding layer for:scanning speed>power>overlapped rate.
Microstructural Features and Mechanical Properties of a Cobalt-based Laser Coating [J].
Online since: December 2012
Authors: Pawan Tyagi
F is the proportionality factor, which included strength of FMR experimental factors like RF magnetic field, microwave frequency; lock in amplifier operational conditions etc.
(c) Damaging AlOx barrier between, without affecting OMCs, produced diffused FMR modes.
FMR studies were not planned around the time of magnetization study, and when all the experimental factors were in the optimized state.
After the discussion on the magnitude of exchange coupling it is imperative to focus on the mechanism by which a strong exchange coupling can affect the magnetic properties of MEMSD’s FM electrodes.
Author has observed OMCs affecting magnetic tunnel junction’s magnetic transport, and optical properties.
Online since: April 2013
Authors: Mohd Nazrul Roslan, Saparudin Ariffin, Mohd Yussni Hashim, Norazlina Ahmad
Additionally, it exhibits poor resistant to moisture, which lead to high water absorption, subsequently resulting in poor mechanical properties and dimensional stability of the natural fiber reinforced composites [5].
It also has been reported that by using the circular fiber area assumption, a considerable error is introduced into the calculated mechanical properties.
This value showed that, different levels of the factor affect the response differently.
[15] Nor Azowa Ibrahim, et al., "Effect of Fiber Treatment on Mechanical Properties of Kenaf Fiber-Ecoflex Composites," Journal of Reinforced Plastics and Composites, vol. 29, pp. 2192-2198, July 1, 2010 2010
Mwaikambo, "Tensile properties of alkalised jute fibres," Bioresources, vol. 4, pp. 566-588, 2009.
Online since: October 2009
Authors: Sheng Lu, Jing Chen, Xiao Dan Jia, Ze Xin Wang, Jing Jing Gong
However conventional fusion welding processes often leave defects, such as porosities and hot cracks in the weld, which declines the mechanical properties of magnesium alloys [3].
The thermal cycle or temperature distribution is a key factor to affect the plastic flow and the final microstructure and mechanical properties of the weld using FSW.
Wang et.al [6, 7] measured the thermal cycle of aluminum alloys during FSW by means of embedding thermocouples and found that thermal cycle influences the mechanical properties of weld by changing the size and distribution of the precipitates.
The aim is to establish a base to correlate the temperature distribution of FSW with the dynamical recrystallization, microstructure and mechanical properties for the weld along different locations for magnesium alloys.
Zhang: Materials for Mechanical Engineering Vol.32, No. 5 (2008), p. 87 [9] J.
Online since: November 2016
Authors: Nakorn Srisukhumbowornchai, Pakawadee Sirilar, Gernot Klein, Purit Thanakijkasem, Somnuk Sirisoonthorn
The test pieces were fired at 1175, 1200 and 1225°C and the physical-mechanical properties (firing shrinkage, flexural strength, and water absorption) were compared.
It could enhance all of the good properties at lower firing temperature.
Table 3 Rheological properties of the cast slurry.
Formulations Rheological Properties Density (g/cm3) Torsion viscosity (°Over swing) B1* 1.707 328 B2 1.714 325 B3 1.725 320 B4 1.706 328 B5 1.701 329 B6 1.706 330 B7 1.702 332 Physical-mechanical properties Firing shrinkage, water absorption and flexural strength depended on firing temperature.
Maiti, Effect of pyrophyllite on vitrification and properties of triaxial porcelain, Ceram.
Online since: August 2019
Authors: Victoria Malets, Petro Savchuk, Vitalii Kashytskyi, Dmitro Matrunchyk, Anastasia Kushniruk
The advantage of nanoscale fillers is that they have high elastic, mechanical, plastic, magnetic, electrical and tribological properties [2].
Ultrasonic treatment positively affects the structure and physical and mechanical properties of epoxy composites, regardless of the magnetic susceptibility of the filler.
[2] Buketov А.V., Sapronov О.О., Brailo М.V., Aleksenko V.L., Influence of the ultrasonic treatment on the mechanical and thermal properties of epoxy nanocomposites, Materials Science. – Vol. 49, Number 5, 2014, рр. 696-702
[8] Stuhlyak, P.D., Epoxy-dyano composites: technology of forming, physico-mechanical and thermophysical properties, Ternopil: Step, 2011, 165
[11] Sanzharovsky A.T., Physico-mechanical properties of polymer and paint coatings, M.: Chemistry, 1978, 184
Online since: October 2012
Authors: Jian Min Sun, Chun Dong Zhang, Ze Yang Zhou
Modeling and Simulation of Chilled Water System for Central Air Conditioning Jianmin Sun 1, a, Chundong Zhang 1, b and Zeyang Zhou 1, c 1School of Mechanical-electronic and Automobile Engineering, Beijing University of Civil Engineering and Architecture, Beijing, China asunjianmin@bucea.edu.cn, b winter5515@163.com,c zhouzeyang123@163.com Keywords: Central air conditioning; Chilled water system; Mathematical modeling; PID control Abstract: Considering the central air conditioning system is highly susceptible to interferences from external environment, this paper established a dynamic mathematical model for chilled water system with the air conditioning area, fan coil unit and air conditioning area interference factors.
Introduction Central air-conditioning systems as a big energy consumer in commercial buildings, the energy saving effect is directly affect the integrated building energy efficiency.
Establish the air conditioning area mathematical transfer function model In terms of central air conditioning system, air conditioning area is influenced by many factors; its thermal equilibrium is a complicated process.
Establish the interference factors of air region mathematical transfer function model Room temperature interference factors: internal disturbance (indoor lighting, personnel) and disturbance (outdoor air through the structure enters into the interior).
In order to not affect the simulation results while ensuring the precision of control system, this paper adopts approximation of two order mathematical model.
Online since: October 2016
Authors: Senthil Padmavathy, S. Nandhakumar, R. Vijayakumar, N. Nagasundaram
Factors which influence the surface roughness are the machining parameters such as feed, cutting speed and tool nose radius, depth of cut and cutting tool and work piece material.
They optimized the cutting parameters and also examined the parameters affecting the machining characteristics.
The properties were tested according to the specified standards.
Mechanical properties of AISI 310 steel Material properties AISI 310 steel Density 7750 Kg/m3 Tensile strength 515Mpa Yield strength 205 Mpa Rockwell hardness 95 Temperature resist Upto 1150oC The three different input parameters with two levels were designed in 2-level Box- Beheken method.
Random order of machining is to avoid noise factors accumulation or domination at one point or over a range of period.
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